Citric Acid and Fruit

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Questions and Answers

In one turn through the Krebs cycle, how many molecules of ATP are produced?

Two molecules of ATP (correct)
Three molecules of ATP
Four molecules of ATP
One molecule of ATP

How many molecules of NADH are produced in one turn through the Krebs cycle?

Three molecules of NADH (correct)
Two molecules of NADH
Four molecules of NADH
One molecule of NADH

What is the first product formed in the Krebs cycle?

Acetyl-CoA
Citric acid (correct)
Oxaloacetate
Pyruvate

What is the waste product released when the third carbon from pyruvate combines with oxygen?

Carbon dioxide (C) Signup and view all the answers

What is the main purpose of the Krebs cycle?

To transfer energy stored in pyruvate to NADH and FADH2 (B) Signup and view all the answers

How many energy-carrier molecules are produced after two turns through the Krebs cycle?

16 (B) Signup and view all the answers

Why is it necessary for the Krebs cycle to go through two turns?

Glycolysis produces two pyruvate molecules when it splits glucose (D) Signup and view all the answers

What happens to the original glucose molecule after the second turn through the Krebs cycle?

It has been broken down completely, and all six of its carbon atoms have combined with oxygen to form carbon dioxide (D) Signup and view all the answers