Question

which of the following is required for aerobic respiration but not anaerobic respiration?
glucose
atp
oxygen
carbon dioxide
what are the products of anaerobic respiration in human muscle cells?
alcohol and carbon dioxide
lactic acid and atp
oxygen and water
glucose and oxygen

Explanation:

• For the first question: Aerobic respiration requires oxygen as the final electron acceptor in the electron - transport chain. Anaerobic respiration does not use oxygen. Glucose is used in both (as a starting substrate for glycolysis). ATP is produced in both. Carbon dioxide can be a product of both (e.g., in some forms of anaerobic respiration like yeast fermentation, and in aerobic respiration).
• For the second question: In human muscle cells, during anaerobic respiration (when oxygen is limited), glucose is broken down through glycolysis. Instead of entering the Krebs cycle and electron - transport chain (which require oxygen), the pyruvate from glycolysis is converted to lactic acid. ATP is also produced (though less than in aerobic respiration). Alcohol and carbon dioxide are products of anaerobic respiration in yeast. Oxygen is not a product of respiration (it is a reactant in aerobic respiration). Glucose is a reactant, not a product of respiration.

Answer:

• First question: Oxygen
• Second question: Lactic acid and ATP