who can tell me if my answer are right or wrong? please???

Question

Which kind of metabolic poison would interfere with glycolysis?
a. An agent that reacts with oxygen and depletes its concentration in the cell.
b. An agent that binds to pyruvate and inactivates it.
c. An agent that closely mimics the structure of glucose, but is not capable of being metabolized.
d. An agent that reacts with NADH and oxidizes it to NAD+.
e. An agent that inhibits the formation of acetyl coenzyme A.
i think answer is B

What results if glucose is metabolized under completely anaerobic conditions?
a. Pyruvic acid immediately enters the Krebs cycle.
b. Pyruvic acid is converted by fermentation into CO2 and ethanol or lactic acid.
c. Pyruvic acid is converted back to fructose until the concentration of oxygen increases.
d. Pyruvic acid leaves the cytosol and enters the mitochondrial matrix.
e. Pyruvic acid is converted to NADH.
I THINK THE ANSWER IS B

Chemiosmosis links a hydrogen gradient to the production of ATP
i think its true

Which of the following is an example of an electron carrier molecule?
a. Citric acid
b. CO2
c. Acetyl CoA
d. NADH
e. ATP
i think its E because ATP is electron carrier then how come i am wrong? NADH is not electron carrier because it does not have plus sign

Answer 1

1. Answer is C. This would interfere with glycolysis because glycolysis starts with glucose. Not B because glycolysis is over by the time pyruvate is formed.
2. Answer is B.
3. True.
4. NADH is NAD+ that has picked up an electron. So NAD+ can pick up an electron and NADH is carrying the electron to the electron transport chain.