any one could help answer these questions, please

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[FONT=Times New Roman, serif]any one could help answer these questions, please.



[FONT=Times New Roman, serif]166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?.
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    [FONT=Times New Roman, serif]d. Secretory IgA.
[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.


[FONT=Times New Roman, serif]a. Absence of biphosphoglycerate binding of hemoglobin.
  1. [FONT=Times New Roman, serif]b. Substitution of 2 proximal histidines.
  2. [FONT=Times New Roman, serif]Decreased solubility of the deoxy form of hemoglobin.
    [FONT=Times New Roman, serif]d. A P50 value for hemoglobin similar to that of myoglobin.
    [FONT=Times New Roman, serif]e. Decreased number of subunits in hemoglobin.
Here are several more questions, Which I don't have clear answers. Someone please help

[FONT=Times New Roman, serif]9 Each of the following viruses is potentially capable of causing cell transformation EXCEPT one. Which one is this EXCEPTION?.


[FONT=Times New Roman, serif]A Retrovirus.
[FONT=Times New Roman, serif]B Herpesvirus.
[FONT=Times New Roman, serif]C Picornavirus.
[FONT=Times New Roman, serif]D Hepatitis B virus.
[FONT=Times New Roman, serif]E Human papillomavirus.


[FONT=Times New Roman, serif]22 Integration of the F factor plasmid into the chromosome?.


[FONT=Times New Roman, serif]A Is essential in order for the chromosome to be transferred during conjugation.
[FONT=Times New Roman, serif]B Is essential in order for the F factor to be transferred during conjugation.
[FONT=Times New Roman, serif]C leads to the formation of F pill.
[FONT=Times New Roman, serif]D produces a mutation.


[FONT=Times New Roman, serif]26 Each of the following conditions involves changes in numbers of cells in an organ or tissue EXCEPT one. Which one is the this EXCEPTION?.


[FONT=Times New Roman, serif]A Aplasia.
[FONT=Times New Roman, serif]B Hyperplasia.
[FONT=Times New Roman, serif]C Hypoplasia.
[FONT=Times New Roman, serif]D Metaplasia.


[FONT=Times New Roman, serif]40 Neurofibromatosis Type I is characterized by which of the following conditions?.
[FONT=Times New Roman, serif]A Multiple mucosal neuromas.
[FONT=Times New Roman, serif]B Perioral melanotic freckles.
[FONT=Times New Roman, serif]C Multiple schwannomas of the skin.
[FONT=Times New Roman, serif]D Development of visceral carcinoma.
[FONT=Times New Roman, serif]E Multiple pigmented macules of the skin.


[FONT=Times New Roman, serif]73 The biologic effect of exotoxin A produced by Pseudomonas aeruginoses is to.
[FONT=Times New Roman, serif]A induce shock.
[FONT=Times New Roman, serif]B inactivate IgG.
[FONT=Times New Roman, serif]C Inhibit protein synthesis.
[FONT=Times New Roman, serif]D Increase levels of cAMP.
[FONT=Times New Roman, serif]E inhibit neutrophil function.

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Last edited:
[FONT=Times New Roman, serif]any one could help answer these questions, please.


[FONT=Times New Roman, serif]166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?.
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    [FONT=Times New Roman, serif]d. Secretory IgA.
[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.

[FONT=Times New Roman, serif]a. Absence of biphosphoglycerate binding of hemoglobin.
  1. [FONT=Times New Roman, serif]b. Substitution of 2 proximal histidines.
  2. [FONT=Times New Roman, serif]Decreased solubility of the deoxy form of hemoglobin.
    [FONT=Times New Roman, serif]d. A P50 value for hemoglobin similar to that of myoglobin.
    [FONT=Times New Roman, serif]e. Decreased number of subunits in hemoglobin.
:cool:
 
[FONT=Times New Roman, serif]166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?.
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    [FONT=Times New Roman, serif]d. Secretory IgA.
[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.


[FONT=Times New Roman, serif]a. Absence of biphosphoglycerate binding of hemoglobin.
  1. [FONT=Times New Roman, serif]b. Substitution of 2 proximal histidines.
  2. [FONT=Times New Roman, serif]Decreased solubility of the deoxy form of hemoglobin.
    [FONT=Times New Roman, serif]d. A P50 value for hemoglobin similar to that of myoglobin.
    [FONT=Times New Roman, serif]e. Decreased number of subunits in hemoglobin.
Here are several more questions, Which I don't have clear answers. Someone please help

[FONT=Times New Roman, serif]9 Each of the following viruses is potentially capable of causing cell transformation EXCEPT one. Which one is this EXCEPTION?.


[FONT=Times New Roman, serif]A Retrovirus.
[FONT=Times New Roman, serif]B Herpesvirus.
[FONT=Times New Roman, serif]C Picornavirus.
[FONT=Times New Roman, serif]D Hepatitis B virus.
[FONT=Times New Roman, serif]E Human papillomavirus.


[FONT=Times New Roman, serif]22 Integration of the F factor plasmid into the chromosome?.


[FONT=Times New Roman, serif]A Is essential in order for the chromosome to be transferred during conjugation.
[FONT=Times New Roman, serif]B Is essential in order for the F factor to be transferred during conjugation.
[FONT=Times New Roman, serif]C leads to the formation of F pill.
[FONT=Times New Roman, serif]D produces a mutation.


[FONT=Times New Roman, serif]26 Each of the following conditions involves changes in numbers of cells in an organ or tissue EXCEPT one. Which one is the this EXCEPTION?.


[FONT=Times New Roman, serif]A Aplasia.
[FONT=Times New Roman, serif]B Hyperplasia.
[FONT=Times New Roman, serif]C Hypoplasia.
[FONT=Times New Roman, serif]D Metaplasia.


[FONT=Times New Roman, serif]40 Neurofibromatosis Type I is characterized by which of the following conditions?.
[FONT=Times New Roman, serif]A Multiple mucosal neuromas.
[FONT=Times New Roman, serif]B Perioral melanotic freckles.
[FONT=Times New Roman, serif]C Multiple schwannomas of the skin.
[FONT=Times New Roman, serif]D Development of visceral carcinoma.
[FONT=Times New Roman, serif]E Multiple pigmented macules of the skin.


[FONT=Times New Roman, serif]73 The biologic effect of exotoxin A produced by Pseudomonas aeruginoses is to.
[FONT=Times New Roman, serif]A induce shock.
[FONT=Times New Roman, serif]B inactivate IgG.
[FONT=Times New Roman, serif]C Inhibit protein synthesis.
[FONT=Times New Roman, serif]D Increase levels of cAMP.
[FONT=Times New Roman, serif]E inhibit neutrophil function.
 
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[FONT=Times New Roman, serif]any one could help answer these questions, please.




[FONT=Times New Roman, serif]166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?.
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    [FONT=Times New Roman, serif]d. Secretory IgA.
[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.



[FONT=Times New Roman, serif]a. Absence of biphosphoglycerate binding of hemoglobin.
  1. [FONT=Times New Roman, serif]b. Substitution of 2 proximal histidines.
  2. [FONT=Times New Roman, serif]Decreased solubility of the deoxy form of hemoglobin.
    [FONT=Times New Roman, serif]d. A P50 value for hemoglobin similar to that of myoglobin.
    [FONT=Times New Roman, serif]e. Decreased number of subunits in hemoglobin.
Here are several more questions, Which I don't have clear answers. Someone please help

[FONT=Times New Roman, serif]9 Each of the following viruses is potentially capable of causing cell transformation EXCEPT one. Which one is this EXCEPTION?.


[FONT=Times New Roman, serif]A Retrovirus.
[FONT=Times New Roman, serif]B Herpesvirus.
[FONT=Times New Roman, serif]C Picornavirus.
[FONT=Times New Roman, serif]D Hepatitis B virus.
[FONT=Times New Roman, serif]E Human papillomavirus.


[FONT=Times New Roman, serif]22 Integration of the F factor plasmid into the chromosome?.


[FONT=Times New Roman, serif]A Is essential in order for the chromosome to be transferred during conjugation.
[FONT=Times New Roman, serif]B Is essential in order for the F factor to be transferred during conjugation.
[FONT=Times New Roman, serif]C leads to the formation of F pill.
[FONT=Times New Roman, serif]D produces a mutation.


[FONT=Times New Roman, serif]26 Each of the following conditions involves changes in numbers of cells in an organ or tissue EXCEPT one. Which one is the this EXCEPTION?.


[FONT=Times New Roman, serif]A Aplasia.
[FONT=Times New Roman, serif]B Hyperplasia.
[FONT=Times New Roman, serif]C Hypoplasia.
[FONT=Times New Roman, serif]D Metaplasia.


[FONT=Times New Roman, serif]40 Neurofibromatosis Type I is characterized by which of the following conditions?.
[FONT=Times New Roman, serif]A Multiple mucosal neuromas.
[FONT=Times New Roman, serif]B Perioral melanotic freckles.
[FONT=Times New Roman, serif]C Multiple schwannomas of the skin.
[FONT=Times New Roman, serif]D Development of visceral carcinoma.
[FONT=Times New Roman, serif]E Multiple pigmented macules of the skin.


[FONT=Times New Roman, serif]73 The biologic effect of exotoxin A produced by Pseudomonas aeruginoses is to.
[FONT=Times New Roman, serif]A induce shock.
[FONT=Times New Roman, serif]B inactivate IgG.
[FONT=Times New Roman, serif]C Inhibit protein synthesis.
[FONT=Times New Roman, serif]D Increase levels of cAMP.
[FONT=Times New Roman, serif]E inhibit neutrophil function.
:smuggrin:
 
[FONT=Times New Roman, serif]73 The biologic effect of exotoxin A produced by Pseudomonas aeruginoses is to.
A induce shock
[FONT=Times New Roman, serif]B inactivate IgG.
[FONT=Times New Roman, serif]C Inhibit protein synthesis.
[FONT=Times New Roman, serif]D Increase levels of cAMP.
[FONT=Times New Roman, serif]E inhibit neutrophil function

endotoxins produces shock and exotoxin A inhibits protein synthesis.
.
 
22 Integration of the F factor plasmid into the chromosome?


A Is essential in order for the chromosome to be transferred during conjugation
B Is essential in order for the F factor to be transferred during conjugation (ANS)
C leads to the formation of F pill
D produces a mutation
 
166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    [FONT=Times New Roman, serif]d. Secretory IgA.
lactoferrin prevent aggregation and kill bacteria
. Secretory IgA only prevent aggregation.
according to the question,the answer is c. anybody can agree with me?

[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.

[FONT=Times New Roman, serif]a. Absence of biphosphoglycerate binding of hemoglobin.
[FONT=Times New Roman, serif]b. Substitution of 2 proximal histidines.
[FONT=Times New Roman, serif]c.Decreased solubility of the deoxy form of hemoglobin.
[FONT=Times New Roman, serif]d. A P50 value for hemoglobin similar to that of myoglobin.
[FONT=Times New Roman, serif]e. Decreased number of subunits in hemoglobin.

still confusing about 178.
in sickle cell anemia,valine replaces glutamate but not histidines why answer c is right?
 
to impaction

73 The biologic effect of exotoxin A produced by Pseudomonas aeruginoses is to
A induce shock

[FONT=Times New Roman, serif]B inactivate IgG.
[FONT=Times New Roman, serif]C Inhibit protein synthesis.
[FONT=Times New Roman, serif]D Increase levels of cAMP.
[FONT=Times New Roman, serif]E inhibit neutrophil function.

the answer should be inhibit protien synthesis, As the virulence factor exotoxin A act on ADP-ribosylate eukaryotic elongation factor 2 in the host cell.Without elongation factor 2, eukaryotic cells cannot synthesize proteins and necrose. So it leads to inhibition of protien synthesis ..:)
 
[FONT=Times New Roman, serif]any one could help answer these questions, please.




[FONT=Times New Roman, serif]166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?.
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    d. Secretory IgA
[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.



[FONT=Times New Roman, serif]a. Absence of biphosphoglycerate binding of hemoglobin.
  1. [FONT=Times New Roman, serif]b. Substitution of 2 proximal histidines.
  2. Decreased solubility of the deoxy form of hemoglobin
    [FONT=Times New Roman, serif]d. A P50 value for hemoglobin similar to that of myoglobin.
    [FONT=Times New Roman, serif]e. Decreased number of subunits in hemoglobin.
Here are several more questions, Which I don't have clear answers. Someone please help

[FONT=Times New Roman, serif]9 Each of the following viruses is potentially capable of causing cell transformation EXCEPT one. Which one is this EXCEPTION?.


[FONT=Times New Roman, serif]A Retrovirus.
[FONT=Times New Roman, serif]B Herpesvirus.
C Picornavirus
[FONT=Times New Roman, serif]D Hepatitis B virus.
[FONT=Times New Roman, serif]E Human papillomavirus.


[FONT=Times New Roman, serif]22 Integration of the F factor plasmid into the chromosome?.


[FONT=Times New Roman, serif]A Is essential in order for the chromosome to be transferred during conjugation.
[FONT=Times New Roman, serif]B Is essential in order for the F factor to be transferred during conjugation.
[FONT=Times New Roman, serif]C leads to the formation of F pill.
D produces a mutation


[FONT=Times New Roman, serif]26 Each of the following conditions involves changes in numbers of cells in an organ or tissue EXCEPT one. Which one is the this EXCEPTION?.


[FONT=Times New Roman, serif]A Aplasia.
[FONT=Times New Roman, serif]B Hyperplasia.
[FONT=Times New Roman, serif]C Hypoplasia.
D Metaplasia


[FONT=Times New Roman, serif]40 Neurofibromatosis Type I is characterized by which of the following conditions?.
[FONT=Times New Roman, serif]A Multiple mucosal neuromas.
[FONT=Times New Roman, serif]B Perioral melanotic freckles.
[FONT=Times New Roman, serif]C Multiple schwannomas of the skin.
[FONT=Times New Roman, serif]D Development of visceral carcinoma.
E Multiple pigmented macules of the skin


[FONT=Times New Roman, serif]73 The biologic effect of exotoxin A produced by Pseudomonas aeruginoses is to.
[FONT=Times New Roman, serif]A induce shock.
[FONT=Times New Roman, serif]B inactivate IgG.
C Inhibit protein synthesis
[FONT=Times New Roman, serif]D Increase levels of cAMP.
[FONT=Times New Roman, serif]E inhibit neutrophil function.

plzz correct me if i am wrong ..
 
166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    [FONT=Times New Roman, serif]d. Secretory IgA.
lactoferrin prevent aggregation and kill bacteria
. Secretory IgA only prevent aggregation.
according to the question,the answer is c. anybody can agree with me?

[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.

[FONT=Times New Roman, serif]a. Absence of biphosphoglycerate binding of hemoglobin.
[FONT=Times New Roman, serif]b. Substitution of 2 proximal histidines.
[FONT=Times New Roman, serif]c.Decreased solubility of the deoxy form of hemoglobin.
[FONT=Times New Roman, serif]d. A P50 value for hemoglobin similar to that of myoglobin.
[FONT=Times New Roman, serif]e. Decreased number of subunits in hemoglobin.

still confusing about 178.
in sickle cell anemia,valine replaces glutamate but not histidines why answer c is right?

well in the sickle cell anemia, the abnormal type of hemoglobin S contains faulty beta chains which when exposed to low concentratiom ofoxygen, it precipetates into long crystals inside the RBC these crystals elongate the cell and give it the appearance of a sickle rather than a biconcave disc. the precipitated hemoglobin also damages the cell membrane, so that the cells become highly fragile, leading to serious anemia. such patients frequently experience a vicious circle of events called a sickle cell disease crisis in which low oxygen tension in the tissue causes sickling , which leads to ruptured RBC , which causesa further decrease in Oxygen tensionand still more sickling and RBC distruction .
'' ref. Gyton and Hall medical physiology 11th ed ... '' :)
 
[FONT=Times New Roman, serif].


[FONT=Times New Roman, serif]40 Neurofibromatosis Type I is characterized by which of the following conditions?.
[FONT=Times New Roman, serif]A Multiple mucosal neuromas.
[FONT=Times New Roman, serif]B Perioral melanotic freckles.
[FONT=Times New Roman, serif]C Multiple schwannomas of the skin.
[FONT=Times New Roman, serif]D Development of visceral carcinoma.
[FONT=Times New Roman, serif]E Multiple pigmented macules of the skin.

[FONT=Times New Roman, serif].

they are commonly known as cafe-au-lait spots and you need 6 or more that are 5 mm in kids or 15 in adults.

check out ctf.org (childrens tumor foundation)
 
[FONT=Times New Roman, serif]any one could help answer these questions, please.



[FONT=Times New Roman, serif]166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?.
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    [FONT=Times New Roman, serif]d. Secretory IgA.
[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.


answer is lactoferrin which is present in secretions and causes bacterial aggregation
secretory IgA prevents attachment of bacteria.
 
[FONT=Times New Roman, serif]22 Integration of the F factor plasmid into the chromosome?.


[FONT=Times New Roman, serif]A Is essential in order for the chromosome to be transferred during conjugation.
[FONT=Times New Roman, serif]B Is essential in order for the F factor to be transferred during conjugation.
[FONT=Times New Roman, serif]C leads to the formation of F pill.
[FONT=Times New Roman, serif]D produces a mutation.

F-plasmids only encode for F-pili. You guys such watch out for bandwagoning onto clearly wrong answers and possibly try actually researching things for yourself. It's much, much easier to type "F-plasmid" into google than it is to ask about it on here, and clearly the results are more accurate...

http://en.wikipedia.org/wiki/F-plasmid
 
[FONT=Times New Roman, serif]any one could help answer these questions, please.



[FONT=Times New Roman, serif]166. Which of the following proteins is involved with bacterial aggregation and subsequent elimination from the oral cavity?.
  1. [FONT=Times New Roman, serif]a.Gustin.
    [FONT=Times New Roman, serif]b. statherin.
    [FONT=Times New Roman, serif]c. lactoferrin.
    [FONT=Times New Roman, serif]d. Secretory IgA.
[FONT=Times New Roman, serif]178. Which of the following describes a major effect of sickle cell anemia?.


answer is lactoferrin which is present in secretions and causes bacterial aggregation
secretory IgA prevents attachment of bacteria.

You have it backwards. Lactoferrin PREVENTS bacterial aggregation and attachment and IgA promotes agglutination of the bacteria by opsonizing them. Lactoferrin is the correct answer though.
 
22 Integration of the F factor plasmid into the chromosome?


A Is essential in order for the chromosome to be transferred during conjugation
B Is essential in order for the F factor to be transferred during conjugation
C leads to the formation of F pill
D produces a mutation
F-plasmids only encode for F-pili. You guys such watch out for bandwagoning onto clearly wrong answers and possibly try actually researching things for yourself. It's much, much easier to type "F-plasmid" into google than it is to ask about it on here, and clearly the results are more accurate...

http://en.wikipedia.org/wiki/F-plasmid
So whats the answer because some ppl say its B others say its E...
Certain donor strains of bacteria transfer genes with high efficiency. In this case, the F factor acts as an episome and integrates itself into the bacterial chromosome. Under these conditions, chromosomal genes are transferred to the recipient cell, and the donor is called a high frequency of recombination (Hfr) donor. During normal conjugation, the donor cell can become a recipient cell if the F factor is transferred during the conjugation. However, during Hfr conjugation, the F factor is rarely transmitted, and the recipient cell does not become a donor cell. The exception occurs if the complete chromosome is transferred, a process requiring about 100 minutes in E. coli. In this case, the F factor is transferred and the recipient becomes a donor cell.
Im comfused??? If a plasmid is integrated into a chromosome then wouldnt it cause a mutation???
 
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