Question

what is the net gain in atp molecules produced during the reactions of glycolysis under anaerobic conditions? a 0 b 2 c 4 d 6

Explanation:

Glycolysis is the first stage of cellular respiration. In anaerobic conditions (without oxygen), glycolysis occurs in the cytoplasm. During glycolysis, 2 ATP molecules are used in the initial steps (to phosphorylate glucose and its derivatives). Then, 4 ATP molecules are produced through substrate - level phosphorylation. The net gain is calculated by subtracting the ATP used from the ATP produced. So, net ATP gain = ATP produced - ATP used = 4 - 2 = 2.

Answer:

B. 2