Select the one most appropriate choice for each.
-the Krebs cycle
A)produces NADH and CO₂; pyruvate oxidized
B)produces ATP, NADH, and CO₂
C)splits glucose into two pyruvate molecules
D)regenerates NAD+as pyruvate is converted to ethanol or lactate
E)uses a membrane-bound system that sets up production of ATP

Question

Select the one most appropriate choice for each.
-the Krebs cycle
A)​produces NADH and CO₂; pyruvate oxidized
B)​​produces ATP, NADH, and CO₂
C)splits glucose into two pyruvate molecules
D)​regenerates NAD+as pyruvate is converted to ethanol or lactate
E)​uses a membrane-bound system that sets up production of ATP

Quizplus · Accepted Answer

The Krebs cycle produces ATP, NADH, and CO₂.

Answer A is incorrect because it describes the process of pyruvate oxidation in the mitochondrial matrix, which is the initial step of the Krebs cycle. Answer C is incorrect because it describes the process of glycolysis, which does split glucose into two pyruvate molecules, but does not involve the Krebs cycle. Answer D is incorrect because it describes the process of fermentation, which occurs in the absence of oxygen and does not involve the Krebs cycle. Answer E is incorrect because it describes the process of oxidative phosphorylation, which occurs in the electron transport chain and involves a membrane-bound system for ATP production, but it is not directly related to the Krebs cycle.

Select the One Most Appropriate Choice for Each