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What are predominant linkages in glycogen between glucose units?
Alpha 1,4
Alpha 1,6
Beta 1,3
Beta 1,4
Beta 1,6
In fermentation, the final electron acceptor is
Water
Oxygen
Carbon dioxide
An organic compound
An inorganic compound
Which of the following primary teeth is MOST likely to have an oblique ridge?
Maxillary canine
Maxillary first molar
Maxillary second molar
Mandibular first molar
Mandibular second molar
Each of the following structures is found in the infratemporal fossae EXCEPT one. Which one is this EXCEPTION?
Lingual nerve
Medial pterygoid muscle
Inferior alveolar nerve
Pterygopalatine ganglion
Pterygoid venous plexus
Each of the following cranial nerves is associated with the cavernous sinus EXCEPT one. Which one is this EXCEPTION?
Facial
Abducens
Trochlear
Trigeminal
Oculomotor
Calcium dipicolinate is present in large amounts in
Spores
Flagella
Mesosomes
Ribosomes
Mitochondria
When compared to the primary mandibular first moral, the primary mandibular second molar normally exhibits a GREATER number of which of the following?
Oblique ridges
Roots
Cusps
Cervical ridges
Transverse ridges
Which of the following describes the movement of glycine molecules in an electric field at a pH of 6.06 (the isoelectric pH for glycine)? The glycine molecules will
Not move
Move to the anode
Move to the cathode
Move to both anode and cathode
Zinc is an essential component of which of the following?
Pepsin
Amaylase
Hexokinase
Adenylate cyclase
Carbonic anhydrase
Which of the following cancers typically arises in teenagers and young adults?
Wilms' tumor
Angiosarcoma
Ewing's sarcoma
Multiple myeloma
Chronic lymphocytic leukemia
Each of the following muscles usually appears in the floor of the posterior triangle EXCEPT one. Which one is this EXCEPTION?
Sternohyoid
Medius scalene
Splenius capitis
Levator scapulae
Anterior belly of omohyoid
In an ideal intercuspal relation, the mesiofacial cusp of the maxillary first molar opposes which morphologic entity of the mandiubular first molar?
Central fossa
Lingual groove
Distofacial groove
Mesiofacial groove
Three days ago, a patient received her third immunization with tetanus toxoid. What class of antibodies specific for tetanus toxoid would one expect to find in her serum?
Similar concentrations of IgM and IgG
High concentrations of both IgM and IgD
Low concentrations of IgM; high concentration of IgE
Low concentration of IgM; high concentration of IgG
High concentration of IgM; low concentration of IgG
Facilitated diffusion DIFFERS from active transport in that net transport by facilitated diffusion
Has a transport maximum
Uses ATP as an energy source
Requires a concentration gradient
Occurs as an endergonic (positive G) process
Mucosa of the anterior two-thirds of the tongue develops primarily from
Rathke's pouch
Tuberculum impar
Foregut endoderm
Hypobranchial eminence
Lateral lingual swellings
Each of the following statements regarding aldosterone is correct EXCEPT one. Which one is this EXCEPTION?
Is a mineralocorticoid
Increases Na uptake from the kidneys
Production is stimulated by angiotensin II
Is produced in the zona fasciculata of the adrenal cortex
Interstitial pulmonary inflammation is MOST characteristic of
Viral pneumonia
Bacterial pneumonia
Lung abscess
Bronchial asthma
Bronchopneumonia
The occlusal outline of a mandibular first molar is similar to a
Circle
Square
Hexagon
Pentagon
Rhomboid
Which of the following statements is correct with respect to mastication of food?
Food is masticated primarily in a border movement
Food is masticated primarily in lateral contacting movement
An ideal occlusion is a requisite for masticatory efficiency
Proper incisor contact is a requisite for masticatory efficiency
Indigestion is generally related to inadequate mastication of food
Human papillomaviruses 16 and 18 are strongly correlated with the appearance of
Genital warts
Plantar warts
Cutaneous warts
Uterine cancer
Cervical cancer
The sensory receptors serving the stretch reflex are classified as
Nociceptors
Chemoreceptors
Proprioceptors
Exteroceptors
Which of the following muscles participates in flexion at the gleno-humeral and the humero-ulnar joints?
Deltoid
Brachialis
Biceps brachii
Triceps brachii
Coracobrachiallis
During fetal development, blood is shunted from the pulmonary artery to the aortic arch by means of the
Foramen ovale
Sinus venosus
Ductus venosus
Ductus arteriosus
Foramen secundum
Which of the following factors MOST influences the lingual concavity of the maxillary anterior teeth and groove direction of the posterior teeth?
Anterior guidance
Angle of the eminence
Curve of the occlusion
Sideshift of the mandible (Bennett movement)
Direction of movement of the rotating condyle
Rough pneumococci grown in the presence of DNA from dead smooth pneumococci develop capsules. This is an example of bacterial
Mutation
Dominance
Conjugation
Transduction
Transformation
Which of the following base pairs promotes helix stabilization in DNA but does NOT do so in RNA?
G-C
A-T
G-U
C-T
A-U
Blood from the cephalic vein drains into which of the following veins?
Basilic
Brachiocephalic
Axillary
Internal thoracic
Superior vena cava
The junction between the tooth surface and the crevicular epithelium is composed of which of the following?
Cementoid
Tight junction
Intermediate filaments
Basal lamina-like structure
Interstitial crevicular fluid
If the anticodon on transfer RNA is 5' ACG 3' then which of the following is its corresponding codon on messenger-RNA?
5' CGT 3'
5' CGU 3'
5' TGC 3'
5' UAG 3'
5' UGC 3'
On the crown of the primary maxillary first molar, the mesial surface normally
Is larger than the distal surface of the same tooth
Exhibits a concave lingual outline
Is wider occlusocervically than buccolingually
Exhibits a straight cervical line
Is wider buccolingually at the occlusal table than at the cervical third
Staphylococcus aureus MOST commonly causes
Skin infections
Septicemia
Sore throat
Chronic infections
Exogenous infections
Each of the following is characteristic of herpes zoster EXCEPT one. Which one is the EXCEPTION?
Unilateral
Usually involves 1-3 dermatomes
Occurs repeatedly in immunocompetent patients
Only occurs in an individual having a latent VZV infection
More common in individuals who are immunocompromised
Which of the following describes the contact relationship between a maxillary central incisor and a maxillary lateral incisor?
Contact is offset to the lingual
Contact is centered incisocervically
Lingual embrassure is larger than the facial embrassure
Incisal embrassure is the largest of all the embrasures
Which of the following shows a relative INCREASE as the dental pulp ages?
Number of fibroblasts
Number of odontoblasts
Number of blood vessels
Size of the pulp chamber
Amount of fibrous connective tissue
The rapid emergence of new strains of human immunodeficiency virus is primarily the result of
The frequent genomic recombination between human immunodeficiency virus and other retroviruses
Frequent errors in the translation of viral proteins
The lack of immune response to the viral envelope glycoprotein
Frequent errors introduced by viral reverse transcriptase
The imprecision of protein cleavage by viral protease
Mesial and distal pulp horns are more likely to be found in which of the following teeth?
Maxillary central incisors
Mandibular central incisors
Mandibular canines
Maxillary first premolars
Mandibular first premolars
The major sensory nerve to the parietal pericardium branches from which of the following nerves?
Vagus
Muscuophrenic
Intercostal
Phrenic
Internal thoracic
Which of the following muscles is MOST concerned in quiet respiration?
Rhomboid
Diaphragm
Subclavius
Sacrospinalis
Pectoralis major
Before swallowing can be initialized, afferent information must be received
From muscle spindles, indicating the consistency of a soft bolus of food
In a lesser amount from nociceptors indicating a soft bolus of food
From mucosal mechanoreceptors, indicating the consistency of a soft bolus of food
From pharyngeal taste receptors, indicating the consistency of a soft bolus of food
When the mandible moves to the right, the mesiolingual cusp of the maxillary right first molar passes through which groove of the mandibular right first molar?
Mesiomarginal
Distofacial
Mesiofacial
Lingual
Central
The antigenic component of which of the following vaccines is a capsular antigen?
Influenza
Poliovirus
Hepatitis B
Haemophilus influenza
Coupled respiration requires each of the following EXCEPT one. Which one is this EXCPETION?
ADP
Oxygen
Carbon dioxide
Electron donor
Inorganic phosphate
As the severity of periodontal disease progresses, there is an increase in plasma cells that produce which of the following?
sIgA
IgD
IgE
IgG
IgM
Which of the following is a complication of cirrhosis?
Splenic atrophy
Hepatic angioma formation
Obstruction of portal circulation
Increased plasma protein formation
Decreased central venous pressure
Which of the following is produced when a mutation occurs in an enzyme controlling a signal pathway involved in cell growth processes?
Epigene
Antigene
Oncogene
Monogene
Transgene
DNA that is complementary to mRNA can be made using which of the following?
A plasmid
DNA ligase
A retrovirus
RNA polymerase
Reverse transcriptase
Which of the following groups of organs is retroperitoneal?
Pancrease, transverse colon, and descending colon
Pancrease, stomach, and ovary
Kidney, transverse colon, and ovary
Ureter, gallbladder, and transverse colon
Kidney, adrenal, and rectum
Each of the following derives from a pharyngeal pouch EXCEPT one. Which one is this EXCEPTION?
Thymus
Parathyroid
Parotid gland
Auditory tube
Palatine tonsil
SEE question 49 (Diagram involved)
Which of the following is caused by vitamin D deficiency in adults?
Rickets
Myxedema
Acromegaly
Osteomalacia
Osteitis fibrosa cystica
In unilateral balanced occlusion, contact between lower buccal cusps and upper buccal cusps, along with simultanwous contact between lower lingual cusps and upper lingual cusps, will MOST likely occur in which of the following types of mandibular movements?
Laterotrusive
Mediotrusive
Straight retrusive
Straight protrusive
The buccal mucosa typically has which of the following epithelia?
Simple columnar
Pseudostratified columnar
Non-keratinzed, stratified squamous
Parakeratinized, stratified squamous
Orthokeratinized, stratified squamous
The apex of the horizontal plane Gothic-arch tracing represents which of the following positions?
Maximum opening
Centric relation
Lateral protrusive
Rest position
Which of the following streptococcal virulence factors acts as a superantigen, mediating a variety of cytokine-induced effects that can result in life-threatening disease?
Pyrogenic exotoxin
Hyaluronidase
Streptokinase
Streptolysin O
Preganglionic parasympathitic fibers that synapse in the pterygopalatine ganglion travel in which of the following nerves?
Maxillary
Lesser palatine
Lesser petrosal
Greater palatine
Greater petrosal
Initiation of calcification for the mandibular central incisor normally occurs at
3-4 months of age
1 year of age
2-3 years of age
4-5 years of age
6-7 years of age
Each of the following viruses is potentially capable of causing cell transformation EXCEPT one. Which one is this EXCEPTION?
Retrovirus
Herpesvirus
Picornavirus
Hepatitis B virus
Human papillomavirus
Of the primary maxillary teeth, the cervical ridge would stand out MOST prominently as a distinct entity on which surface of which molar?
First Distofacial
First Mesiofacial
Second Distofacial
Second Mesiolingual
Second Distolingual
IL-1 is primarily produced by which of the following?
Neutrophils
Macrophages
Plasma cells
T-helper cells
T-suppressor cells
During endodontic therapy, one will usually find two pulp canals in which of the following?
Mandibular canine
Distofacial root of a maxillary molar
Distal root of a mandibular first molar
Mesial root of a mandibular first molar
Lingual root of a maxillary first molar
Which of the following statements BEST applies to saliva?
Phosphate is the main pH buffer
Supplies sialate for additional mucins
Main source of enzymes for protein digestion
Supplies calcium and phosphate for remineralization
Undersaturated with respect to hydroxyapatite at neutral pH
Smooth muscle contains each of the following muscle proteins EXCEPT one. Which one is this EXCEPTION?
Actin
Myosin
Troponin
Tropomyosin
Cell bodies of neurons mediating proprioception from the periodontal lifament of the maxillary first molar lie in the
Semilunar ganglion
Motor nucleus of V
Spinal nucleus of V
Chief sensory nucleus of V
Mesencephalic nucleus of V
Which of the following can be used to distinguish the palatine tonsil from the pharyngeal tonsil on the histologic level?
General shape of the tonsil
Number of lymphatic nodules
Type of epithelium associated with it
Type of lymphocytes present
Presence or absence of Hassall's corpuscles
The movement in the upper compartment of the temporomandibular joint is rotation and translation.The movement in the lower compartment is translation.
Both statements are TRUE
Both statements are FALSE
The first statement is TRUE, and the second is FALSE
The first statement is FALSE, and the second is TRUE
As blood flows through the periodontal membrane, tremendous pressures occur in response to forceful occlusion. Blood flow is temporarily reduced, but platelets do not aggregate because of the presence of
Ca
ADP
Thrombin
Thromboxane A2
Prostacyclin (PgI2)
Which of the following parts of the hypophysis is the site of oxytocin release?
Pars nervosa
Infundibulum
Pars distalis
Pars tuberalis
Pars intermedia
The non-working condyle performs which of the following movements?
Straight forward
Forward and downward
Downward, forward, and lateral
Downward, backward, and medial
Downward, forward, and medial
Which of the following substances is the predominant source of ATP at MODERATE levels (for greater than 60 minutes) of activity?
Amino acids
Fatty acids
Carbohydrates
Proteins
Which of the following premotes the release of bile from the gallbladder?
Gasrin
Secretin
Galla
Bombesin
Cholecystokinin
Which of the following teeth represents the one MOST likely to present with three roots?
Mandibular central incisor
Mandibular second premolar
Mandibular canine
Maxillary first premolar
Maxillary second premolar
Which of the following chemical agents is approved as an immersion sterilant?
Iodophors
Ethyl alcohol
Glutaraldehydes
Synthetic phenolics
Sodium hypochlorite
Granulation tissue is comprised of each of the following components EXCEPT one. Which one is this EXCEPTION?
Fibroblasts
Plasma cells
Capillary buds
Endothelial cells
Newly formed collagen
Following eruption and initial occlusal contact in the oral cavity, a tooth will continue to erupt in order to compensate for occlusal wear. In response to this continuous eruption, which of the following is deposited at the apex of the root?
Primary dentin
Secondary dentin
Reparative dentin
Cellular cementum
Acellular cementum
Which of the following would produce the greatest DECREASE in resistance in a single artery 2 mm long and with a radius of 1.2 mm?
A halving in length
A doubling in length
An increase in radius by a factor of 2
A decrease in blood viscosity by a factor of 2
Which of the following BEST describes a centric holding cusp of a mandibular left second molar?
It is the distofacial cusp and occludes in the embrassure between maxillary first and second molars
It is the distofacial cusp and occludes in the central fossa of a maxillary second molar
It is the distolingual cusp and occludes in the embrassure between maxillary first and second molars
It is the distolingual cusp and occludes in the central fossa of a maxillary second molar
Oral streptococci are usually
Gamma-hemolytic
Alpha-hemolytic
Beta-hemolytic
Non-hemolytic
The cell membrane is LEAST permeable to which of the following substances?
O2
CO2
H2O
Sodium
Ethanol
Which of the following types of dentin is the MOST highly mineralized?
Carious
Predentin
Intertubular
Interglobular
Intra(peri)tubular
Each of the following can be found in the dental pulp EXCEPT one. Which one is this EXCEPTION?
Nerve tissue
Blood vessels
Cementoblasts
Lymph vessels
According to the Spaulding Classification System for contaminated items and srufaces, semi-critical items should be reprocessed by
Exposure to ethylene oxide
A spray-wipe-spray technique
Immersion in a tuberculocidal disinfectant
Washing with a chlorhexidine fluconate disinfectant
Heat stabilization if the material is heat stable
In the contractile cycle, the dissociation of the actomyosin complex results MOST immediately from
ATP hydrolysis
Release of ATP hydrolysis products
ATP replacing ADP on the myosin heads
Tilting of the myosin heads (crossbridges)
Which of the following represents the consequence of the fact that DNA strans are complementary?
Hairpin loop structures can be generated
They will always have identical sequences
Separated strands are able to reassociate
They cannot get back together once separated
Which of the following predominates in steroid producing cells?
Smooth endoplasmic reticulum
Rough endoplasmic reticulum
Golgi apparatus
Phagosomes
Nucleolus
The spacing between anterior teeth in the primary dentition is MOST frequently caused by
Thumb-sucking
Tongue thrusting
Transseptal gingival fibers
The growth of the dental arches
The pressure form succedaeous teeth
Each of the following types of cells is phagocytic EXCEPT one. Which one is this EXCEPTION?
Monocyte
Histiocyte
Neutrophil
Macrophage
Lymphocyte
Which of the following is MOST likely to promote depolymerization of extracellular matrix?
Corisone
Collagenase
Chymotrypsin
Hyaluronidase
In the intercuspal position, which of the following anterior teeth has the potential of contacting both anterior and posterior antagonists?
Maxillary lateral incisor
Mandibular lateral incisor
Maxillary canine
Mandibular canine
In the oral region, the lingual artery usually is found between the
Lingual and hypoglossal nerves
Mylohyoid and geniohyoid muscles
Hyoglossus and genioglossus muscles
Sublingual duct and hypoglossal nerve
Oral mucous membrane and the anterior belly of the digastric muscle
Each of the following is a type of inflammatory exudate EXCEPT one. Which one is this EXCPETION?
Suppurative
Fibrous
Purulent
Fibrinous
Pseudomembranous
A substance alters the rate of an enzymatic reaction by binding to the enzyme at a site other than the active site. The substance described is a (an)
Uncoupler
Covalent modifier
Allosteric inhibitor
Competitive inhibitor
Post-translational modifier
On a maxillary first molar, the occlusal outline contains two obtuse and two acute angles. The acute line angles are
Mesiolingual and distolingual
Mesiofacial and distiolingual
Mesiolingual and distofacial
Mesiofacial and distofacial
Distofacial and distolingual
When T-cells from patients who have chronic periodontal disease react with certain plaque bacterial antigens, they produce each of the following EXCEPT one. Which one is this EXCEPTION?
Immunoglobulin
IL-2
TNF-B
IFN-y
During which of the following would blood flow to the coronary arteries be GREATEST in a resting individual
Isovolumic contraction
Ventricular ejection
Atrial contraction
Ventricular relaxation
Atropine prevents the secretion of saliva resulting from stimulation of the chorda tympani because it
Denatures the salivary gland proteins
Prevents the action of acetylcholine on the secreting cells
Prevents release of acetylcholine by sympathetic postganglionic fibers
Prevents release of acetylcholine in autonomic ganglia
If the point of a needle enters the parotid gland during an inferior alveolar injection and solution is deposited in the gland, the MOST likely result is
Paralysis of the buccinator muscle
Paralysis of the temporalis muscle
Paresthesia of the lingual nerve
Paralysis of temporal tympani
A hematoma of the pterygoid venous plexus
Which of the following promotes edema?
Increased blood proteins
Increased sodium excretion
Decreased lymphatic drainage
Decreased venule blood pressure
Increased plasma osmotic pressure
Which of the following BEST describes the primary ionic movement during the depolarization phase of a nerve action potential?
Potassium ions moving from inside to outside the membrane
Potassium ions moving into the fiber from interstitial fluid
Large organic-negative ions moving from inside the fiber to outside the fiber
Sodium ions moving from inside the membrane to outside the membrane
Sodium ions moving from outside the membrane to inside the membrane
A mature ovum is expelled from which of the following?
Corpus luteum
Corpus albicans
Graafian follicles
Corpus hemorrhagicum
Which of the following is the characteristic immunoglobulin present in human external secretions (i.e. saliva, tears, intestinal juice)?
Monomeric IgE
Monomeric IgA
Polymeric IgG4
Polymeric IgA
Secretory IgD
Which of the following is the cellular organelle that contains many types of hydorlytic enzymes?
Lysosome
Centrosome
Mitochondrion
Golgi apparatus
Endoplasmic reticulum
Ordinarily, a 6 year old child would have which of the following teeth clinically visible?
All primary teeth only
All primary teeth and permanent first molars
Primary posterior teeth, permanent first molars, and central incisors
Primary canines, permanent first molars, and permanent mandibular incisors
Alpha 1,4
Alpha 1,6
Beta 1,3
Beta 1,4
Beta 1,6
In fermentation, the final electron acceptor is
Water
Oxygen
Carbon dioxide
An organic compound
An inorganic compound
Which of the following primary teeth is MOST likely to have an oblique ridge?
Maxillary canine
Maxillary first molar
Maxillary second molar
Mandibular first molar
Mandibular second molar
Each of the following structures is found in the infratemporal fossae EXCEPT one. Which one is this EXCEPTION?
Lingual nerve
Medial pterygoid muscle
Inferior alveolar nerve
Pterygopalatine ganglion
Pterygoid venous plexus
Each of the following cranial nerves is associated with the cavernous sinus EXCEPT one. Which one is this EXCEPTION?
Facial
Abducens
Trochlear
Trigeminal
Oculomotor
Calcium dipicolinate is present in large amounts in
Spores
Flagella
Mesosomes
Ribosomes
Mitochondria
When compared to the primary mandibular first moral, the primary mandibular second molar normally exhibits a GREATER number of which of the following?
Oblique ridges
Roots
Cusps
Cervical ridges
Transverse ridges
Which of the following describes the movement of glycine molecules in an electric field at a pH of 6.06 (the isoelectric pH for glycine)? The glycine molecules will
Not move
Move to the anode
Move to the cathode
Move to both anode and cathode
Zinc is an essential component of which of the following?
Pepsin
Amaylase
Hexokinase
Adenylate cyclase
Carbonic anhydrase
Which of the following cancers typically arises in teenagers and young adults?
Wilms' tumor
Angiosarcoma
Ewing's sarcoma
Multiple myeloma
Chronic lymphocytic leukemia
Each of the following muscles usually appears in the floor of the posterior triangle EXCEPT one. Which one is this EXCEPTION?
Sternohyoid
Medius scalene
Splenius capitis
Levator scapulae
Anterior belly of omohyoid
In an ideal intercuspal relation, the mesiofacial cusp of the maxillary first molar opposes which morphologic entity of the mandiubular first molar?
Central fossa
Lingual groove
Distofacial groove
Mesiofacial groove
Three days ago, a patient received her third immunization with tetanus toxoid. What class of antibodies specific for tetanus toxoid would one expect to find in her serum?
Similar concentrations of IgM and IgG
High concentrations of both IgM and IgD
Low concentrations of IgM; high concentration of IgE
Low concentration of IgM; high concentration of IgG
High concentration of IgM; low concentration of IgG
Facilitated diffusion DIFFERS from active transport in that net transport by facilitated diffusion
Has a transport maximum
Uses ATP as an energy source
Requires a concentration gradient
Occurs as an endergonic (positive G) process
Mucosa of the anterior two-thirds of the tongue develops primarily from
Rathke's pouch
Tuberculum impar
Foregut endoderm
Hypobranchial eminence
Lateral lingual swellings
Each of the following statements regarding aldosterone is correct EXCEPT one. Which one is this EXCEPTION?
Is a mineralocorticoid
Increases Na uptake from the kidneys
Production is stimulated by angiotensin II
Is produced in the zona fasciculata of the adrenal cortex
Interstitial pulmonary inflammation is MOST characteristic of
Viral pneumonia
Bacterial pneumonia
Lung abscess
Bronchial asthma
Bronchopneumonia
The occlusal outline of a mandibular first molar is similar to a
Circle
Square
Hexagon
Pentagon
Rhomboid
Which of the following statements is correct with respect to mastication of food?
Food is masticated primarily in a border movement
Food is masticated primarily in lateral contacting movement
An ideal occlusion is a requisite for masticatory efficiency
Proper incisor contact is a requisite for masticatory efficiency
Indigestion is generally related to inadequate mastication of food
Human papillomaviruses 16 and 18 are strongly correlated with the appearance of
Genital warts
Plantar warts
Cutaneous warts
Uterine cancer
Cervical cancer
The sensory receptors serving the stretch reflex are classified as
Nociceptors
Chemoreceptors
Proprioceptors
Exteroceptors
Which of the following muscles participates in flexion at the gleno-humeral and the humero-ulnar joints?
Deltoid
Brachialis
Biceps brachii
Triceps brachii
Coracobrachiallis
During fetal development, blood is shunted from the pulmonary artery to the aortic arch by means of the
Foramen ovale
Sinus venosus
Ductus venosus
Ductus arteriosus
Foramen secundum
Which of the following factors MOST influences the lingual concavity of the maxillary anterior teeth and groove direction of the posterior teeth?
Anterior guidance
Angle of the eminence
Curve of the occlusion
Sideshift of the mandible (Bennett movement)
Direction of movement of the rotating condyle
Rough pneumococci grown in the presence of DNA from dead smooth pneumococci develop capsules. This is an example of bacterial
Mutation
Dominance
Conjugation
Transduction
Transformation
Which of the following base pairs promotes helix stabilization in DNA but does NOT do so in RNA?
G-C
A-T
G-U
C-T
A-U
Blood from the cephalic vein drains into which of the following veins?
Basilic
Brachiocephalic
Axillary
Internal thoracic
Superior vena cava
The junction between the tooth surface and the crevicular epithelium is composed of which of the following?
Cementoid
Tight junction
Intermediate filaments
Basal lamina-like structure
Interstitial crevicular fluid
If the anticodon on transfer RNA is 5' ACG 3' then which of the following is its corresponding codon on messenger-RNA?
5' CGT 3'
5' CGU 3'
5' TGC 3'
5' UAG 3'
5' UGC 3'
On the crown of the primary maxillary first molar, the mesial surface normally
Is larger than the distal surface of the same tooth
Exhibits a concave lingual outline
Is wider occlusocervically than buccolingually
Exhibits a straight cervical line
Is wider buccolingually at the occlusal table than at the cervical third
Staphylococcus aureus MOST commonly causes
Skin infections
Septicemia
Sore throat
Chronic infections
Exogenous infections
Each of the following is characteristic of herpes zoster EXCEPT one. Which one is the EXCEPTION?
Unilateral
Usually involves 1-3 dermatomes
Occurs repeatedly in immunocompetent patients
Only occurs in an individual having a latent VZV infection
More common in individuals who are immunocompromised
Which of the following describes the contact relationship between a maxillary central incisor and a maxillary lateral incisor?
Contact is offset to the lingual
Contact is centered incisocervically
Lingual embrassure is larger than the facial embrassure
Incisal embrassure is the largest of all the embrasures
Which of the following shows a relative INCREASE as the dental pulp ages?
Number of fibroblasts
Number of odontoblasts
Number of blood vessels
Size of the pulp chamber
Amount of fibrous connective tissue
The rapid emergence of new strains of human immunodeficiency virus is primarily the result of
The frequent genomic recombination between human immunodeficiency virus and other retroviruses
Frequent errors in the translation of viral proteins
The lack of immune response to the viral envelope glycoprotein
Frequent errors introduced by viral reverse transcriptase
The imprecision of protein cleavage by viral protease
Mesial and distal pulp horns are more likely to be found in which of the following teeth?
Maxillary central incisors
Mandibular central incisors
Mandibular canines
Maxillary first premolars
Mandibular first premolars
The major sensory nerve to the parietal pericardium branches from which of the following nerves?
Vagus
Muscuophrenic
Intercostal
Phrenic
Internal thoracic
Which of the following muscles is MOST concerned in quiet respiration?
Rhomboid
Diaphragm
Subclavius
Sacrospinalis
Pectoralis major
Before swallowing can be initialized, afferent information must be received
From muscle spindles, indicating the consistency of a soft bolus of food
In a lesser amount from nociceptors indicating a soft bolus of food
From mucosal mechanoreceptors, indicating the consistency of a soft bolus of food
From pharyngeal taste receptors, indicating the consistency of a soft bolus of food
When the mandible moves to the right, the mesiolingual cusp of the maxillary right first molar passes through which groove of the mandibular right first molar?
Mesiomarginal
Distofacial
Mesiofacial
Lingual
Central
The antigenic component of which of the following vaccines is a capsular antigen?
Influenza
Poliovirus
Hepatitis B
Haemophilus influenza
Coupled respiration requires each of the following EXCEPT one. Which one is this EXCPETION?
ADP
Oxygen
Carbon dioxide
Electron donor
Inorganic phosphate
As the severity of periodontal disease progresses, there is an increase in plasma cells that produce which of the following?
sIgA
IgD
IgE
IgG
IgM
Which of the following is a complication of cirrhosis?
Splenic atrophy
Hepatic angioma formation
Obstruction of portal circulation
Increased plasma protein formation
Decreased central venous pressure
Which of the following is produced when a mutation occurs in an enzyme controlling a signal pathway involved in cell growth processes?
Epigene
Antigene
Oncogene
Monogene
Transgene
DNA that is complementary to mRNA can be made using which of the following?
A plasmid
DNA ligase
A retrovirus
RNA polymerase
Reverse transcriptase
Which of the following groups of organs is retroperitoneal?
Pancrease, transverse colon, and descending colon
Pancrease, stomach, and ovary
Kidney, transverse colon, and ovary
Ureter, gallbladder, and transverse colon
Kidney, adrenal, and rectum
Each of the following derives from a pharyngeal pouch EXCEPT one. Which one is this EXCEPTION?
Thymus
Parathyroid
Parotid gland
Auditory tube
Palatine tonsil
SEE question 49 (Diagram involved)
Which of the following is caused by vitamin D deficiency in adults?
Rickets
Myxedema
Acromegaly
Osteomalacia
Osteitis fibrosa cystica
In unilateral balanced occlusion, contact between lower buccal cusps and upper buccal cusps, along with simultanwous contact between lower lingual cusps and upper lingual cusps, will MOST likely occur in which of the following types of mandibular movements?
Laterotrusive
Mediotrusive
Straight retrusive
Straight protrusive
The buccal mucosa typically has which of the following epithelia?
Simple columnar
Pseudostratified columnar
Non-keratinzed, stratified squamous
Parakeratinized, stratified squamous
Orthokeratinized, stratified squamous
The apex of the horizontal plane Gothic-arch tracing represents which of the following positions?
Maximum opening
Centric relation
Lateral protrusive
Rest position
Which of the following streptococcal virulence factors acts as a superantigen, mediating a variety of cytokine-induced effects that can result in life-threatening disease?
Pyrogenic exotoxin
Hyaluronidase
Streptokinase
Streptolysin O
Preganglionic parasympathitic fibers that synapse in the pterygopalatine ganglion travel in which of the following nerves?
Maxillary
Lesser palatine
Lesser petrosal
Greater palatine
Greater petrosal
Initiation of calcification for the mandibular central incisor normally occurs at
3-4 months of age
1 year of age
2-3 years of age
4-5 years of age
6-7 years of age
Each of the following viruses is potentially capable of causing cell transformation EXCEPT one. Which one is this EXCEPTION?
Retrovirus
Herpesvirus
Picornavirus
Hepatitis B virus
Human papillomavirus
Of the primary maxillary teeth, the cervical ridge would stand out MOST prominently as a distinct entity on which surface of which molar?
First Distofacial
First Mesiofacial
Second Distofacial
Second Mesiolingual
Second Distolingual
IL-1 is primarily produced by which of the following?
Neutrophils
Macrophages
Plasma cells
T-helper cells
T-suppressor cells
During endodontic therapy, one will usually find two pulp canals in which of the following?
Mandibular canine
Distofacial root of a maxillary molar
Distal root of a mandibular first molar
Mesial root of a mandibular first molar
Lingual root of a maxillary first molar
Which of the following statements BEST applies to saliva?
Phosphate is the main pH buffer
Supplies sialate for additional mucins
Main source of enzymes for protein digestion
Supplies calcium and phosphate for remineralization
Undersaturated with respect to hydroxyapatite at neutral pH
Smooth muscle contains each of the following muscle proteins EXCEPT one. Which one is this EXCEPTION?
Actin
Myosin
Troponin
Tropomyosin
Cell bodies of neurons mediating proprioception from the periodontal lifament of the maxillary first molar lie in the
Semilunar ganglion
Motor nucleus of V
Spinal nucleus of V
Chief sensory nucleus of V
Mesencephalic nucleus of V
Which of the following can be used to distinguish the palatine tonsil from the pharyngeal tonsil on the histologic level?
General shape of the tonsil
Number of lymphatic nodules
Type of epithelium associated with it
Type of lymphocytes present
Presence or absence of Hassall's corpuscles
The movement in the upper compartment of the temporomandibular joint is rotation and translation.The movement in the lower compartment is translation.
Both statements are TRUE
Both statements are FALSE
The first statement is TRUE, and the second is FALSE
The first statement is FALSE, and the second is TRUE
As blood flows through the periodontal membrane, tremendous pressures occur in response to forceful occlusion. Blood flow is temporarily reduced, but platelets do not aggregate because of the presence of
Ca
ADP
Thrombin
Thromboxane A2
Prostacyclin (PgI2)
Which of the following parts of the hypophysis is the site of oxytocin release?
Pars nervosa
Infundibulum
Pars distalis
Pars tuberalis
Pars intermedia
The non-working condyle performs which of the following movements?
Straight forward
Forward and downward
Downward, forward, and lateral
Downward, backward, and medial
Downward, forward, and medial
Which of the following substances is the predominant source of ATP at MODERATE levels (for greater than 60 minutes) of activity?
Amino acids
Fatty acids
Carbohydrates
Proteins
Which of the following premotes the release of bile from the gallbladder?
Gasrin
Secretin
Galla
Bombesin
Cholecystokinin
Which of the following teeth represents the one MOST likely to present with three roots?
Mandibular central incisor
Mandibular second premolar
Mandibular canine
Maxillary first premolar
Maxillary second premolar
Which of the following chemical agents is approved as an immersion sterilant?
Iodophors
Ethyl alcohol
Glutaraldehydes
Synthetic phenolics
Sodium hypochlorite
Granulation tissue is comprised of each of the following components EXCEPT one. Which one is this EXCEPTION?
Fibroblasts
Plasma cells
Capillary buds
Endothelial cells
Newly formed collagen
Following eruption and initial occlusal contact in the oral cavity, a tooth will continue to erupt in order to compensate for occlusal wear. In response to this continuous eruption, which of the following is deposited at the apex of the root?
Primary dentin
Secondary dentin
Reparative dentin
Cellular cementum
Acellular cementum
Which of the following would produce the greatest DECREASE in resistance in a single artery 2 mm long and with a radius of 1.2 mm?
A halving in length
A doubling in length
An increase in radius by a factor of 2
A decrease in blood viscosity by a factor of 2
Which of the following BEST describes a centric holding cusp of a mandibular left second molar?
It is the distofacial cusp and occludes in the embrassure between maxillary first and second molars
It is the distofacial cusp and occludes in the central fossa of a maxillary second molar
It is the distolingual cusp and occludes in the embrassure between maxillary first and second molars
It is the distolingual cusp and occludes in the central fossa of a maxillary second molar
Oral streptococci are usually
Gamma-hemolytic
Alpha-hemolytic
Beta-hemolytic
Non-hemolytic
The cell membrane is LEAST permeable to which of the following substances?
O2
CO2
H2O
Sodium
Ethanol
Which of the following types of dentin is the MOST highly mineralized?
Carious
Predentin
Intertubular
Interglobular
Intra(peri)tubular
Each of the following can be found in the dental pulp EXCEPT one. Which one is this EXCEPTION?
Nerve tissue
Blood vessels
Cementoblasts
Lymph vessels
According to the Spaulding Classification System for contaminated items and srufaces, semi-critical items should be reprocessed by
Exposure to ethylene oxide
A spray-wipe-spray technique
Immersion in a tuberculocidal disinfectant
Washing with a chlorhexidine fluconate disinfectant
Heat stabilization if the material is heat stable
In the contractile cycle, the dissociation of the actomyosin complex results MOST immediately from
ATP hydrolysis
Release of ATP hydrolysis products
ATP replacing ADP on the myosin heads
Tilting of the myosin heads (crossbridges)
Which of the following represents the consequence of the fact that DNA strans are complementary?
Hairpin loop structures can be generated
They will always have identical sequences
Separated strands are able to reassociate
They cannot get back together once separated
Which of the following predominates in steroid producing cells?
Smooth endoplasmic reticulum
Rough endoplasmic reticulum
Golgi apparatus
Phagosomes
Nucleolus
The spacing between anterior teeth in the primary dentition is MOST frequently caused by
Thumb-sucking
Tongue thrusting
Transseptal gingival fibers
The growth of the dental arches
The pressure form succedaeous teeth
Each of the following types of cells is phagocytic EXCEPT one. Which one is this EXCEPTION?
Monocyte
Histiocyte
Neutrophil
Macrophage
Lymphocyte
Which of the following is MOST likely to promote depolymerization of extracellular matrix?
Corisone
Collagenase
Chymotrypsin
Hyaluronidase
In the intercuspal position, which of the following anterior teeth has the potential of contacting both anterior and posterior antagonists?
Maxillary lateral incisor
Mandibular lateral incisor
Maxillary canine
Mandibular canine
In the oral region, the lingual artery usually is found between the
Lingual and hypoglossal nerves
Mylohyoid and geniohyoid muscles
Hyoglossus and genioglossus muscles
Sublingual duct and hypoglossal nerve
Oral mucous membrane and the anterior belly of the digastric muscle
Each of the following is a type of inflammatory exudate EXCEPT one. Which one is this EXCPETION?
Suppurative
Fibrous
Purulent
Fibrinous
Pseudomembranous
A substance alters the rate of an enzymatic reaction by binding to the enzyme at a site other than the active site. The substance described is a (an)
Uncoupler
Covalent modifier
Allosteric inhibitor
Competitive inhibitor
Post-translational modifier
On a maxillary first molar, the occlusal outline contains two obtuse and two acute angles. The acute line angles are
Mesiolingual and distolingual
Mesiofacial and distiolingual
Mesiolingual and distofacial
Mesiofacial and distofacial
Distofacial and distolingual
When T-cells from patients who have chronic periodontal disease react with certain plaque bacterial antigens, they produce each of the following EXCEPT one. Which one is this EXCEPTION?
Immunoglobulin
IL-2
TNF-B
IFN-y
During which of the following would blood flow to the coronary arteries be GREATEST in a resting individual
Isovolumic contraction
Ventricular ejection
Atrial contraction
Ventricular relaxation
Atropine prevents the secretion of saliva resulting from stimulation of the chorda tympani because it
Denatures the salivary gland proteins
Prevents the action of acetylcholine on the secreting cells
Prevents release of acetylcholine by sympathetic postganglionic fibers
Prevents release of acetylcholine in autonomic ganglia
If the point of a needle enters the parotid gland during an inferior alveolar injection and solution is deposited in the gland, the MOST likely result is
Paralysis of the buccinator muscle
Paralysis of the temporalis muscle
Paresthesia of the lingual nerve
Paralysis of temporal tympani
A hematoma of the pterygoid venous plexus
Which of the following promotes edema?
Increased blood proteins
Increased sodium excretion
Decreased lymphatic drainage
Decreased venule blood pressure
Increased plasma osmotic pressure
Which of the following BEST describes the primary ionic movement during the depolarization phase of a nerve action potential?
Potassium ions moving from inside to outside the membrane
Potassium ions moving into the fiber from interstitial fluid
Large organic-negative ions moving from inside the fiber to outside the fiber
Sodium ions moving from inside the membrane to outside the membrane
Sodium ions moving from outside the membrane to inside the membrane
A mature ovum is expelled from which of the following?
Corpus luteum
Corpus albicans
Graafian follicles
Corpus hemorrhagicum
Which of the following is the characteristic immunoglobulin present in human external secretions (i.e. saliva, tears, intestinal juice)?
Monomeric IgE
Monomeric IgA
Polymeric IgG4
Polymeric IgA
Secretory IgD
Which of the following is the cellular organelle that contains many types of hydorlytic enzymes?
Lysosome
Centrosome
Mitochondrion
Golgi apparatus
Endoplasmic reticulum
Ordinarily, a 6 year old child would have which of the following teeth clinically visible?
All primary teeth only
All primary teeth and permanent first molars
Primary posterior teeth, permanent first molars, and central incisors
Primary canines, permanent first molars, and permanent mandibular incisors