Biology Practice Questions
Started by cl24uw06
cl24uw06 said:
c) left atrium
Insulincl24uw06 said:
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dOprah said:
I think Dcl24uw06 said:
esophaguscl24uw06 said:
heshyn2000 said:
wrong...epiglottis
wrong again...C -> after release of bicarbonate from pancreaseheshyn2000 said:
Comet208 said:
It's a good news. I hope they are as easy as these questions. ;-) I hate questions that ask about a strange organism that I haven't heard about. classes, orders, families and the like. I don't think I can possibly memorize all the classes, orders, families and the names of all organisms that belong to each category....Some of the questions that I have seen on practice tests seem to have deviated from the objectives of the DAT. I hope the real test is not like that.
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ok..i'll play...
Which of the following statements about DNA polymerase is incorrect?
a. it joins complementary base pairs to each other.
b. it is able to proofread and correct for errors in base pairing.
c. it is unable to join free nucleotides unless an RNA primer is present.
d. it only works in the 5' to 3' direction.
e. it is found in eurkaryotes and prokaryotes.
Which of the following statements about DNA polymerase is incorrect?
a. it joins complementary base pairs to each other.
b. it is able to proofread and correct for errors in base pairing.
c. it is unable to join free nucleotides unless an RNA primer is present.
d. it only works in the 5' to 3' direction.
e. it is found in eurkaryotes and prokaryotes.
cl24uw06 said:
Do u mind explaining the second and third question again. I thought it was D for the second question since it asked for the primany mRNA transcript made so if this the is the original strain 3'AAGGCTAGC5' then shouldn't it be 5' UUCCGAUCG3'. I thought Uracil replaces the thymine for RNA. Also the last answer, do you mind explaing that one 'cause for some reason I got UCC CGA UCG.. I guess i would get that one wrong if i don't get the second one...
by the way, I think this is helpful.... Way to go 👍
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Oprah said:
resting potential neurions ... I was thinking isn't it where they are more K inside then Na... 2k in 3 NA out. It's also more negative inside so i am thinking it's high chloride inside since it has negative charge...
Tnz said:
I'd say the question has no correct answer.
mitochondria, chloroplasts, nucleus are organelles and are only found in eukaryotes.
Some eukaryotes (e.g. plants) & some prokaryotes (bacteria) have cell walls.
katieTX said:
good job! you are correct!
do you know the endo-symbiont hypothesis - it will give you insight as to how/why mitochondria and chloroplasts both contain their own genomes (dna). REMEMBER - plants have BOTH chloroplasts and mitochondria. Chloroplasts for photosynthesis (obviously), and mitochnorida for utilizing energy from products of photosyntheis (yes, plants need energy too!).
So, yes, you are correct in the forumalation of answer choice d as the correct answer, you are correctomundo! good job katie! keep it up!
Tnz said:
a. typical of the early pre-cambrian fossils
b. typical of several types of chordates
c. an adaptation for aquatic life
d. none of the above
my guess would be none of the above
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A. function to provide the cell a source of energy.Tnz said:
B. are present in plants.
C. contain DNA.
D. all of the above
I don't agree.I think the answer is all of the above.
a. the cnidaria (with the ctenophores), and all other metazoaTnz said:
b. hephalumps and heterolumps
c. arthropods and chordates
d. protostomes and deuterostomes
wrong answer. I think the correct answer is "protosomes and deutrosomes"
Tnz said:
mainly due to the proteins inside NOT the cloride
dat_student said:
why none of the above? i think tnz was correctomundo!
check this out,
spiral and radial cleavage describes the deuterostomes and the protostomes, one cleaves sprialy ,and the other radially. i can't remember which is which. However, both deuterostomes and protostomes evolved last among animal kingdom, therefore, choice a is eliminated. choice c is eliminated because humans and many land animals undergoe radial cleavage. answer b is correct, since it's simply true.
DICK said:
b cannot possibly be correct
Here is the question again:
Spiral and radial cleavage are
a. typical of the early pre-cambrian fossils
b. typical of several types of chordates
c. an adaptation for aquatic life
d. none of the above
chordates don't have spiral cleavage.
dat_student said:
i mixed radial for spiral!!!!!!!!!!!!!
whoops ! I got tricked! well done dat_student for catching my stupidity! You are quite corectomundo! I have eliminated choice a and c in my previous post, and now I must eliminate choice b!
answer is simply d, none of the above
👍 NEXT...
1.The study of tissues is known as
A) etymology.
B) cytology.
C) pathology.
D) histology.
2.Which of the following is not one of the four types of tissues?
A) nervous
B) muscular
C) mesodermal
D) epithelial
3.The fibers of connective tissue are embedded in the matrix, which is also known as
A) lacunae.
B) mesenchyme.
C) parenchyma.
D) ground substance.
4.Which of the following is not a characteristic of connective tissue?
A) matrix
B) ground substance
C) collagen fibers
D) basement membrane
5.Epithelium may be modified to form
A) glands.
B) connective tissue.
C) lacunae.
D) ground substance.
6.Dense connective tissue is found in
A) tendons.
B) blood.
C) bone.
D) cartilage.
7.Blood, lymph, and tissue fluid are classified as _________ tissue.
A) adipose
B) simple
C) stratified
D) vascular
8._______ are cavities within bone or cartilage where cells reside.
A) Canaliculi
B) Osteons
C) Lacunae
D) Glia
9.In a neuron, the _________ typically receive neural impulses from adjacent neurons.
A) axon hillocks
B) dendrites
C) axons
D) nodes of Ranvier
10.The junction between neurons is known as the
A) hillock.
B) node.
C) synapse.
D) glia.
11.Fluid within the cell is known as the
A) intracellular fluid.
B) extracellular fluid.
C) interstitial fluid.
D) plasma.
12.A fibrous protein that is particularly abundant in many types of connective tissues is
A) keratin.
B) collagen
C) sclerenchyma.
D) parenchyma.
13.Which of the following is a pseudocoelomate animal?
A) a sponge
B) a nematode
C) a fish
D) a jellyfish
14.Vertebrates have only two types of striated muscle; skeletal and smooth.
A) True
B) False
15.The cellular components of bone are referred to as chondrocytes.
A) True
B) False
A) etymology.
B) cytology.
C) pathology.
D) histology.
2.Which of the following is not one of the four types of tissues?
A) nervous
B) muscular
C) mesodermal
D) epithelial
3.The fibers of connective tissue are embedded in the matrix, which is also known as
A) lacunae.
B) mesenchyme.
C) parenchyma.
D) ground substance.
4.Which of the following is not a characteristic of connective tissue?
A) matrix
B) ground substance
C) collagen fibers
D) basement membrane
5.Epithelium may be modified to form
A) glands.
B) connective tissue.
C) lacunae.
D) ground substance.
6.Dense connective tissue is found in
A) tendons.
B) blood.
C) bone.
D) cartilage.
7.Blood, lymph, and tissue fluid are classified as _________ tissue.
A) adipose
B) simple
C) stratified
D) vascular
8._______ are cavities within bone or cartilage where cells reside.
A) Canaliculi
B) Osteons
C) Lacunae
D) Glia
9.In a neuron, the _________ typically receive neural impulses from adjacent neurons.
A) axon hillocks
B) dendrites
C) axons
D) nodes of Ranvier
10.The junction between neurons is known as the
A) hillock.
B) node.
C) synapse.
D) glia.
11.Fluid within the cell is known as the
A) intracellular fluid.
B) extracellular fluid.
C) interstitial fluid.
D) plasma.
12.A fibrous protein that is particularly abundant in many types of connective tissues is
A) keratin.
B) collagen
C) sclerenchyma.
D) parenchyma.
13.Which of the following is a pseudocoelomate animal?
A) a sponge
B) a nematode
C) a fish
D) a jellyfish
14.Vertebrates have only two types of striated muscle; skeletal and smooth.
A) True
B) False
15.The cellular components of bone are referred to as chondrocytes.
A) True
B) False
Wrong, the answer is D.Tnz said:
Hadiya said:
1. D
2. C?
3. B (a wild guess)
4. C (wot is ground subs?)
5. D - are you serious?
6. C - i think
7. D, i guess, but i thought bload would be considered connective (b/c of definition)
8. B (a guess, def not D)
9. B 🙂 yay! i know this one!
10. C - woo, another! 🙂
11. A 😀
12. B 😕
13. B - i just finished studying this topic 15 min ago (am i right? is it B?)
14. i don't think smooth muscle is striaghted, FALSE 😀
15. TRUE 😕 - it sounds so familiar
HOW DID I DO OUT OF 15?
the questions at the beginning were kind of hard (for me at least), what is 'ground substance', thanks for the questions!
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DICK said:
1st glance:
your aswers to 3, 6, 8, & 15 are wrong...
Before I post the answers, good job Dick. You got 9 (including Q7 which I think there is a mistake) out of 15 right...
1) D.
Histology : The study of the tissues.
2) C.
The four types of animal tissues are: Epithelial - a covering tissue.
Connective - connecting and supporting
tissue.
Nerve- a conducting tissue
Muscle - a contracting tissue.
* Mesodermal is the wrong choice because it is derived from Mesoderm, one of the germ layers.
3) D.
Fibers of the connective tissue are embedded in an extracellular matrix which is also called ground substance. The ground substance is a liquid or jellylike where the framework of the connective cells lie.
4) D.
The free surface of the epithelium is exposed to air or fluid whereas the cellls at the base of the barrier are attached to a basement membrane, a dense mat of extracellular matrix (Campbell and Reece, pg 835). Therefore, connective tissue is not characterised by basement membrane.
5) A.
In addition to protecting the cells they line, some ephithelial cells called glandular ephitelia absorb or secrete solutions. They line the thyroid gland and secrete a hormone that regulates the body's rate of fuel consumption. There glandular epithelia that lines the lumen of the stomach also secretes a solution called mucus that lubricates the surface and keeps it moist (Campbell and Reece pg 835).
6) A.
Fibrous connective tissues are dense due to its large numbers of collagenous fibers and are found in the tendons (attach muscles to bones) and ligaments (bone to bone).
7)I suppose connective tissue should have been one of the answers (thank you Dick for correcting me).
8) C.
Bone consists of extracellular matrix with relatively few bone cells residing in lacunae in the solid matrix.
9)B.
dendrites transmit impulses from their tips towards the cell body.
10) C.
Synapse is the locus where one neuron communicates with another neuron in a neural pathway.
11) A
Intracellular fluid.
12) B.
Connective tissue fibers are of three kinds: Collagenous fibers (made up of collagen), elastic fibers (made up of elastin) and reticular fibers (they are also made up of collagen).
13) B.
Nematode
14) B.
False because smooth muslces are not striated.
15) B.
I think the answer is: osteoblasts (double check).
1) D.
Histology : The study of the tissues.
2) C.
The four types of animal tissues are: Epithelial - a covering tissue.
Connective - connecting and supporting
tissue.
Nerve- a conducting tissue
Muscle - a contracting tissue.
* Mesodermal is the wrong choice because it is derived from Mesoderm, one of the germ layers.
3) D.
Fibers of the connective tissue are embedded in an extracellular matrix which is also called ground substance. The ground substance is a liquid or jellylike where the framework of the connective cells lie.
4) D.
The free surface of the epithelium is exposed to air or fluid whereas the cellls at the base of the barrier are attached to a basement membrane, a dense mat of extracellular matrix (Campbell and Reece, pg 835). Therefore, connective tissue is not characterised by basement membrane.
5) A.
In addition to protecting the cells they line, some ephithelial cells called glandular ephitelia absorb or secrete solutions. They line the thyroid gland and secrete a hormone that regulates the body's rate of fuel consumption. There glandular epithelia that lines the lumen of the stomach also secretes a solution called mucus that lubricates the surface and keeps it moist (Campbell and Reece pg 835).
6) A.
Fibrous connective tissues are dense due to its large numbers of collagenous fibers and are found in the tendons (attach muscles to bones) and ligaments (bone to bone).
7)I suppose connective tissue should have been one of the answers (thank you Dick for correcting me).
8) C.
Bone consists of extracellular matrix with relatively few bone cells residing in lacunae in the solid matrix.
9)B.
dendrites transmit impulses from their tips towards the cell body.
10) C.
Synapse is the locus where one neuron communicates with another neuron in a neural pathway.
11) A
Intracellular fluid.
12) B.
Connective tissue fibers are of three kinds: Collagenous fibers (made up of collagen), elastic fibers (made up of elastin) and reticular fibers (they are also made up of collagen).
13) B.
Nematode
14) B.
False because smooth muslces are not striated.
15) B.
I think the answer is: osteoblasts (double check).
Hadiya said:
I think 15 is "osteocyte" It's a more general term.
5.Epithelium may be modified to form
A) glands.
B) connective tissue.
C) lacunae.
D) ground substance.
oops! I confused epithelium with epidermis
I have looked into an anatomy and physiology textbook and this is what they have:
There are 4 types of cells in Bone tissue and they are:
1) osteoprogenitor: These cells are derived from mesenchyma and can undergo mitosis.
2) Osteoblasts (blast=germ or bud): They secrete collagen needed to build the bone and they have lost the ability to divide by mitosis. In the diagram that they have, osteoblast are found on the surface of the bone.
3) Osteocytes (cyte = cell): They are mature bone cells that derive from the osteoblasts. They have no mitotic potential. They are contained in the lacunae and they no longer secrete matrix but instead instead maintain cellular activities of bone tissue.
4) Osteoclasts(clast = to break): These types of cells settle on the surfaces of the bone and function in bone resorption (destruction of matrix).
According to the way the question was asked, any of these could be the answer. The Anatomy and physiology book that I have got this info from is called "Principles of Anatomy and Physiology" by Gerard tortora andGrabowski
Awuah29, I think the Math would be a great idea and I am sure many would benefit from it.
There are 4 types of cells in Bone tissue and they are:
1) osteoprogenitor: These cells are derived from mesenchyma and can undergo mitosis.
2) Osteoblasts (blast=germ or bud): They secrete collagen needed to build the bone and they have lost the ability to divide by mitosis. In the diagram that they have, osteoblast are found on the surface of the bone.
3) Osteocytes (cyte = cell): They are mature bone cells that derive from the osteoblasts. They have no mitotic potential. They are contained in the lacunae and they no longer secrete matrix but instead instead maintain cellular activities of bone tissue.
4) Osteoclasts(clast = to break): These types of cells settle on the surfaces of the bone and function in bone resorption (destruction of matrix).
According to the way the question was asked, any of these could be the answer. The Anatomy and physiology book that I have got this info from is called "Principles of Anatomy and Physiology" by Gerard tortora andGrabowski
Awuah29, I think the Math would be a great idea and I am sure many would benefit from it.
Hadiya said:
Thanks Hadiya. A great set of questions and answers. I learned so much.
I thought bringing this thread back from the dead might be helpful to some of you preparing to take the DAT, good luck.
Which of the following has a 1-way digestive tract?
A. amoeba
B. earthworm
C. hydra
D. jellyfish
E. paramecium
A. amoeba
B. earthworm
C. hydra
D. jellyfish
E. paramecium
B-is the answer. Annelids are segmented worms that have 1-way digestive tract. mouth-anus
Answers A and E Amoeba and paramecium lack digestive system
Answers C and D cnidarians like hydra and jellyfis have only single opening-ingest and expel food.
I've followed this tread through, and if you wouldn't mind posting the answers to your latest questions I'd appreciate it.
Thanks.
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