Question

which processes require oxygen? check all that apply. conversion of pyruvic acid to acetyl coa conversion of pyruvic acid to lactic acid conversion of pyruvic acid to alcohol production of carbon dioxide in the citric acid cycle production of water in the electron transport chain production of pyruvic acid in glycolysis

Explanation:

1. Conversion of pyruvic acid to Acetyl CoA: This occurs in aerobic respiration (after glycolysis) and requires oxygen - related pathways (part of the preparatory step for the citric acid cycle, which is aerobic).
2. Conversion of pyruvic acid to lactic acid: This is anaerobic (lactic acid fermentation), no oxygen needed.
3. Conversion of pyruvic acid to alcohol: This is anaerobic (alcoholic fermentation), no oxygen needed.
4. Production of carbon dioxide in the citric acid cycle: The citric acid cycle is part of aerobic respiration and occurs in the presence of oxygen (relies on the overall aerobic pathway).
5. Production of water in the electron transport chain: The electron transport chain uses oxygen as the final electron acceptor to form water, so this process requires oxygen.
6. Production of pyruvic acid in glycolysis: Glycolysis is anaerobic (can occur with or without oxygen), so no oxygen is required for this step.

Answer:

• conversion of pyruvic acid to Acetyl CoA
• production of carbon dioxide in the citric acid cycle
• production of water in the electron transport chain