Question

During the Krebs cycle:

a) the products of glycolysis are further broken down, generating additional ATP and the high-energy electron carrier NADH.
b) the products of glycolysis are further broken down, generating additional ATP and the high-energy electron carrier NADPH.
c) the products of glycolysis are converted into acetyl-CoA.
d) high-energy electron carriers pass their energy to molecules of sugar, which in turn store them as potential energy.
e) cellular respiration can continue even in the absence of oxygen."

Answer 1

During the Krebs cycle, pyruvate molecules are converted into acetyl CoA and undergo a series of reactions that produce high-energy NADH, FADH2, and ATP molecules.

Step-by-step explanation:

During the Krebs cycle, each pyruvate molecule generated by glycolysis is converted into a two-carbon acetyl CoA molecule. The acetyl CoA is systematically processed through the cycle and produces high-energy NADH, FADH2, and ATP molecules. These high-energy molecules, particularly NADH and FADH2, then donate electrons to the electron transport chain, which generates more ATP molecules through chemiosmosis. Therefore, option a) is correct - the products of glycolysis are further broken down, generating additional ATP and the high-energy electron carrier NADH.