Question

Under anaerobic conditions (a lack of oxygen), the conversion of pyruvate to acetyl CoA stops. Which of these statements is the correct explanation for this observation? Which of these statements is the correct explanation for this observation? a) Oxygen is required to convert glucose to pyruvate in glycolysis. Without oxygen, no pyruvate can be made. b)ATP is needed to convert pyruvate to acetyl CoA. Without oxygen, no ATP can be made in oxidative phosphorylation. c)Oxygen is an input to acetyl CoA formation. d) In the absence of oxygen, electron transport stops. NADH is no longer converted to NAD+, which is needed for the first three stages of cellular respiration.

Answer 1

Answer:in the absence of oxygen, electron transport stops. NADH is no longer converted to NAD+, which is needed for the first three stages of cellular respiration

Step-by-step explanation:

Answer 2

The answer is c)oxygen is an input to acetyl CoA formation.

Step-by-step explanation:

After pyruvate is produced during glycolysis, its fate depends on oxygen availability. If there is enough oxygen available then pyruvate will enter the citric acid cycle, also called Krebs cycle. Pyruvate will then be oxidized by the pyruvate dehydrogenase complex into acetyl-coA and CO2. However, if there is not enough oxygen available, then pyruvate will undergo a reduction reaction by the lactate dehydrogenase enzyme and produced lactate along NAD+ production from NADH.