Biology Practice Questions
Started by cl24uw06
What is the value of the alcoholic fermentation pathway?
a. it produces ATP
b. it produces lactate (or lactic acid)
c. it produces ADP for the electron transport chain
d. it replenishes CO2 for he dark reaction
e. it replenishes NAD+ so that glycolysis can produce ATP
a. it produces ATP
b. it produces lactate (or lactic acid)
c. it produces ADP for the electron transport chain
d. it replenishes CO2 for he dark reaction
e. it replenishes NAD+ so that glycolysis can produce ATP
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If only K+ gates open on the postsynaptic membrane, then:
a. the postsynaptice membrane releases a neurotransmitter
b. an excitatory postsynaptic potential is established
c. the post synaptice neuron is stimulated
d. the postsynaptic neuron is inhibited
e. Ca2+ is released
a. the postsynaptice membrane releases a neurotransmitter
b. an excitatory postsynaptic potential is established
c. the post synaptice neuron is stimulated
d. the postsynaptic neuron is inhibited
e. Ca2+ is released
D. Chitin is a polysaccharide found in the exoskeleton or arthropods and in the cell walls of fungi.
Anyone care as to why the others are correct? Just means more typing for me..
C. The antheridia of the gametophyte generationof bryophytes, Lycophyta, Sphenophyta, and Pterophyta produce male gametes.
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E. In the absence of oxygen, all of the NAD+ gets converted to NADH. With no NAD+ to accept electrons from the glycolytic steps, glycolysis stops. By replenishing NAD+, alcoholic fermentation allows glycolysis to continue.
C. The contraction of the left ventricle pumps blood through the body and thus maintains the systolic blood pressure.
D. If K+ gates are stimulated to open on the postsynaptic membran, an inhibitory postsynaptic potential is established. This makes the membrane more polarized (remember the inside is more negative already), and it is more difficult to establish an action potential.
Forgot one!
D. During strenuous exercise, glucose is broken down to pyruvate. Anaerobic respiration, which would occur during strenuous exercise, would increase lactate formation. Exercise would also consume ATP, producing ADP and P.
What is the difference if you rush K+ or Na+ into the cell? The inside will become more positive either way, moving the potential toward treshhold. Example: Hair cells of the ear. To establish a inhibitory postsynaptic threshold the inside of the cell would need to become more negative moving away from threshold. Ex: Cl- ion rushing into the cell.
Anybody else want to chime in...
So if that is true then what happens in those people with a deficient aortic valve? The valve actually creates the pressure by preventing backflow. Think about a water hose....placing your thumb over the end of the hose increases the pressure causing the water to shoot out further. Remove your thumb and the pressure decreases. I think this is a trick question b/c the left ventricle when compared to the other chambers does have an increased pressure hence then more size but systole is due to the closing of the semi lunar valve.
Anyone one else....
Great questions!!!!!!! Everyone should contribute!!!!!!!!!
AAA.!!! Reptiles DID NOT give rise to primates in any shape or form!!! Reptiles are advanced Diapsids, while primates are advanced synapsids!
I think a point you are missing, and it is an often forgotten fact, is that there is an excess of K+ inside the cell and an excess of Na+ outside the cell. Also, the inside of the cell is more negative than the outside the of the cell, thus it is polarized. When K+ gates open, K+ flows out of the cell following its concentration gradient thus making the inside of the cell even more negative (I believe this is called hyperpolarization).
Hope this helps!
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Eneey meeny mineey mo -B
ANSWER: D CHITIN as far as i remember is found only in insects.WHATS PHYCOBILINS NEVER HEARD OF THEM.
You take a nucleus of a rat embryo and inject it into an enucleated rat egg and it results in the development of a normal rat. This is an example/demonstrates what?
A. Cloning
B. Fertilization
C. Indeterminate fate (Determination)
D. Parthenogenesis
E. cellular differentiation
F. or maybe something else?
I remember this question from an old Life Science class and have been searching for the answer ever since remembering it. I actually don't know the answer to this one, so help would be appreciated... 🙂
A. Cloning
B. Fertilization
C. Indeterminate fate (Determination)
D. Parthenogenesis
E. cellular differentiation
F. or maybe something else?
I remember this question from an old Life Science class and have been searching for the answer ever since remembering it. I actually don't know the answer to this one, so help would be appreciated... 🙂
What would happen to the rabbit population if the coyote population went down drastically?
A. Go up exponentially
B. Go up then down
C. stays the same
D. I dunno if any of those other ones are correct, I'm gonna explain my self...
again, don't quite know the answer my self... I would assume it goes up mighty quickly till it hits a cap and then drops, but that would make choosing between A and B difficult since you don't really know the time frame of B...
A. Go up exponentially
B. Go up then down
C. stays the same
D. I dunno if any of those other ones are correct, I'm gonna explain my self...
again, don't quite know the answer my self... I would assume it goes up mighty quickly till it hits a cap and then drops, but that would make choosing between A and B difficult since you don't really know the time frame of B...
Hi guys ,
This thread was awesome ! I love it . It's really not fair to get benefits from people who posted these questions and answers . Therefore , i will add some questions ...
Which of the following describes how binary fission and mitosis are the same ?
A. Two genetically identical daughter cells are produced.
B. Replication of DNA occurs.
C. Only one chromosome involved.
D. Division of the nucleus occurs.
E. Chromosomes are separated.
This thread was awesome ! I love it . It's really not fair to get benefits from people who posted these questions and answers . Therefore , i will add some questions ...
Which of the following describes how binary fission and mitosis are the same ?
A. Two genetically identical daughter cells are produced.
B. Replication of DNA occurs.
C. Only one chromosome involved.
D. Division of the nucleus occurs.
E. Chromosomes are separated.
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Wrong . At first , i chose A . But the answer key gave me the different answer . The answer is E . I do not quite agree with them because they said "
In prokaryotes , where binary fission occurs , there is a single chromosome that is not enclosed in a nucleus . Replication of the chromosome occurs , followed by invagination of the plasma membrane and cell wall formation that divide the cell into 2 genetically identical cells ( Clones) . The production of the of daughter cells in not the result of mitosis . Rather , the division of the cell to produce 2 daughter cells occurs in a second process called cytokinesis."🙁
lol! they just trying to make you feel bad about your self! thats a load of crap! cytokinesis is PART of mitosis! actually, maybe not. hmm.....
well I'm not sure if E is so correct because in mitosis, chromaTIDS are separated, not crhomoSOMES. also, I'm not sure if binary fission even uses chromatids...
edit: wikipedia (love)
Cytokinesis is the process whereby the cytoplasm of a single cell is divided to spawn two daughter cells. It usually initiates during the late stages of mitosis, and sometimes meiosis
so it is part of mitosis.
and binary fission does not use chromatids, but mitosis does, so E cannot be correct...
wow the only logical choice is lungs? but thats weird, but sounds correct. I'm quite sure there are frogs with no lungs. I remember watching those lil suckers as a kid and wondering why they never opened their mouths. (didn't know they might have nose holes back then...)
someone PLEASE explain to me how this sentence makes ANY sense!!!?
"The hydrolysis of ATP from ADP and inorganic phosphate can drive cellular work."
this is an implication from our beloved topcore... I cannot seem to wrap my head around this friggin question. I believe that it is inherently INCORRECT!
I believe that "from" should be "to"
"The hydrolysis of ATP from ADP and inorganic phosphate can drive cellular work."
this is an implication from our beloved topcore... I cannot seem to wrap my head around this friggin question. I believe that it is inherently INCORRECT!
I believe that "from" should be "to"
You cross a red flowered plant with a white flowered plant , and all of the offspring have pink floweres . What is the most probable explanation ?
A. Red is dominant
B. White is dominant
C. Pink is dominant
D. Red and white exhibit incomplete dominance
E. Red and white exhibit codominance
A. Red is dominant
B. White is dominant
C. Pink is dominant
D. Red and white exhibit incomplete dominance
E. Red and white exhibit codominance
D. incomplete dominance.
the P generation are homozygous dominant for red and white. all the F1 are heterozygous. red and white are not being shown completely at the same time, rather, a mix of the two. so ditch codominance for incomplete dominance.
for anyone that is interested, check out the latest journal of SCIENCE...they just found a lungless frog. pretty cool if you ask me 😎👍
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I like you guys...here's my contribution
The bodywall of the tapeworm has millions of fingerlike projections that
A. increase the surface area for absorption of nutrients
B. cling to the host's intestinal wall
C. secret digestive enzymes
D. trap the tapeworm's prey
The bodywall of the tapeworm has millions of fingerlike projections that
A. increase the surface area for absorption of nutrients
B. cling to the host's intestinal wall
C. secret digestive enzymes
D. trap the tapeworm's prey
the previous one to this is to increase absorption surface area.
this one I believe would be iron. I think heme iron is better/easier for the body than non-heme iron... aside from that, most of the other stuff is found in milk or nuts/nut variations (legumes...).
A is the correct answer. Tapeworms don't have a digestive tract cuz they absorb already digested stuff, so increased SA would help.
B is the correct answer. I do not have an explanation for this one.
I don't know where you got this question from, but I think the inner cell mass are ur stem cells. Therefore they could get converted to any organ you want to develop.
Some question froms my old campbell, so I really don't have answers to them. Lets decide what the answers would be
1. Pheasants do not feed their chicks. Immediately after hatching a pheasant chick starts pecking at seeds and insects on the ground. How might a behavioral ecologist explain the ultimate cause of the behavior?
A. Pecking is a FAP
B. Pheasants learned to peck and their offspring inherited this behavior
C. Pheasants hat pecked survived and reproduced best
D. Pecking is a result of imprinting during a sensitive period
E. Pecking is an example of habituation
1. Pheasants do not feed their chicks. Immediately after hatching a pheasant chick starts pecking at seeds and insects on the ground. How might a behavioral ecologist explain the ultimate cause of the behavior?
A. Pecking is a FAP
B. Pheasants learned to peck and their offspring inherited this behavior
C. Pheasants hat pecked survived and reproduced best
D. Pecking is a result of imprinting during a sensitive period
E. Pecking is an example of habituation
2. Which of the following is true of animals that use the sun to navigate?
A. They cannot travel large distances
B. Most live in the sea, where ther are few landmarks
C. They must have accurate biological clocks
D. Most migrate in large schools, flocks,a nd herds
E. They more easily travel east and west than north and south
A. They cannot travel large distances
B. Most live in the sea, where ther are few landmarks
C. They must have accurate biological clocks
D. Most migrate in large schools, flocks,a nd herds
E. They more easily travel east and west than north and south
3. Ants carry dead ants out of the anthill and dump them on a "trashpile." If a live ant is painetd with a chemical from dead ant, other ants repeatedly carry it, kicking and struggling to the trashpile, until the substrate wears off. Which of the following best explains this behavior?
A. The chemical is a sign stumilus for FAP
B. The ants have become imprinted on the chemical
C. The ants continue the behavior until they become habituated
D. The ants can learn only by trial and error
E. The chemical trigger a negative taxis
A. The chemical is a sign stumilus for FAP
B. The ants have become imprinted on the chemical
C. The ants continue the behavior until they become habituated
D. The ants can learn only by trial and error
E. The chemical trigger a negative taxis
4. Which of the following initiates the process of blood clotting?
A. damage to the lining of blood vessels
B. exposure of blood to the air
C. converison of fibrinogen to fibrin
D. attraction of leukocytes to a site of infection
E. conversion of fibrin to fibrinogen
A. damage to the lining of blood vessels
B. exposure of blood to the air
C. converison of fibrinogen to fibrin
D. attraction of leukocytes to a site of infection
E. conversion of fibrin to fibrinogen
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