Bio Question Help

[jenk329]

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Here are some practice questions I came up on, could someone help with these questions?

1. Almost all of the oxygen (O2) one consumes in breathing is converted to:
a. acetyl-CoA
b. water
c. carbon monoxide adn then to carbon dioxide
d. carbon dioxide
e. none of the above

2. A drug blocks electron transfer in cytochrome oxidase (Complex IV). If intact mitochondria were incubated with excess NADJ and O2 in the presence of the drug, which of the following would be found only in the oxidized state?
a. Coenzyme Q
b. Cytochrome a3
c. Cytochrome b
d. cytomchrome C1
e. Fe-S centers in succinate dehydrogenase

3. Which of the following statements about teh chemiosmostic theory is correct?
a. Electron transfer in mitochondria is accompanied by an asymmetric release of protons on one side of the inner mictochondrial membrane.
b. it predicts that oxidative phosphorylation can occur even in the absense of an intact inner through membrane.
c. The effect of uncoupling reagents is a consequence of thier ability to cary electrons through membranes.
d. The membrane protien ATP synthase has no significant role in the chemiosmotic theory.
e. All of the above are correct.

 

[Chrono1984]

Im pretty sure the answer to number one is water. Oxygen is the final electron acceptor at the end of cellular respiration and gets converted into water. I have ideas of what the other 2 are, but I would rather not guess and give you false answers.

 

[TEXDENT]

those questions are pretty hard looking, where did you come upon them?

 

[americanpierg]

Here are some practice questions I came up on, could someone help with these questions?

1. Almost all of the oxygen (O2) one consumes in breathing is converted to:
a. acetyl-CoA
b. water
c. carbon monoxide adn then to carbon dioxide
d. carbon dioxide
e. none of the above

2. A drug blocks electron transfer in cytochrome oxidase (Complex IV). If intact mitochondria were incubated with excess NADJ and O2 in the presence of the drug, which of the following would be found only in the oxidized state?
a. Coenzyme Q
b. Cytochrome a3
c. Cytochrome b
d. cytomchrome C1
e. Fe-S centers in succinate dehydrogenase

3. Which of the following statements about teh chemiosmostic theory is correct?
a. Electron transfer in mitochondria is accompanied by an asymmetric release of protons on one side of the inner mictochondrial membrane.
b. it predicts that oxidative phosphorylation can occur even in the absense of an intact inner through membrane.
c. The effect of uncoupling reagents is a consequence of thier ability to cary electrons through membranes.
d. The membrane protien ATP synthase has no significant role in the chemiosmotic theory.
e. All of the above are correct.

lol...ive never even heard of nadj before...crap

but id guess 1.B 3.A

 

[Marina1981]

1 - d
2 - a
3 - c
???

 

[howui3]

lol...ive never even heard of nadj before...crap

but id guess 1.B 3.A

i think it's a type, should be NADH (the J and the H are next to each other)

 

[Mackchops]

Pretty certain that 1 is water and 3 is A... don't know about #2, though it sounds like the drug might create a fermentation-state? Maybe? I still don't know what the answer would be though...

Those are pretty tricky.