Question

1. what happens to pyruvate after glycolysis if oxygen is present? a. it is converted back into glucose. b. it is directly used to generate atp in the nucleus. c. it is broken down into carbon dioxide in the cytoplasm. d. it is transported into the mitochondrion to enter the citric acid cycle.

Explanation:

When oxygen is present after glycolysis, pyruvate is transported into the mitochondrion to enter the Citric - Acid Cycle. It is not converted back into glucose, not broken down into carbon dioxide in the cytoplasm, and not directly used to generate ATP in the nucleus.

Answer:

d. It is transported into the mitochondrion to enter the Citric Acid Cycle.