Question

level 2
q3
which of the following statements is false?
a. glycolysis can occur with or without oxygen
b. glycolysis occurs in the mitochondria
c. glycolysis produces 2 atp, 2 nadh, and 2 pyruvate
d. glycolysis is the first step in both aerobic and anaerobic respiration

a. glycolysis can occur with or without oxygen
b glycolysis occurs in the mitochondria
c glycolysis produces 2 atp, 2 nadh, and 2 pyruvate
d glycolysis is the first step in both aerobic and anaerobic respiration

Explanation:

• Option A: Glycolysis is an anaerobic process (can occur without oxygen) and also happens in the first step of aerobic respiration (so with oxygen - related pathways later), so it can occur with or without oxygen. This is true.
• Option B: Glycolysis occurs in the cytoplasm, not the mitochondria. Mitochondria are involved in the later stages of aerobic respiration (like the Krebs cycle and electron transport chain). So this statement is false.
• Option C: The net products of glycolysis from one glucose molecule are 2 ATP, 2 NADH, and 2 pyruvate. This is true.
• Option D: Glycolysis is indeed the first step in both aerobic (which then proceeds to Krebs cycle and ETC in mitochondria) and anaerobic (which proceeds to fermentation) respiration. This is true.

Answer:

B. Glycolysis occurs in the mitochondria