Question

Which part of cellular respiration requires oxygen in order to take place?
Responses

Krebs cycle
Krebs cycle

Fermentation
Fermentation

Calvin cycle
Calvin cycle

Glycolysis

Answer 1

The correct response is the **Krebs cycle**. While glycolysis can occur without oxygen, the Krebs cycle (also known as the citric acid cycle) requires oxygen indirectly, as it takes place in aerobic conditions. Fermentation occurs in the absence of oxygen, and the Calvin cycle is part of photosynthesis, not cellular respiration.