Question

both aerobic and anaerobic respiration yield a net gain of atp molecules to be used as energy for living things. the processes of ______ would yield the highest number of atp
a glycolysis
b fermentation
c oxidative phosphorylation (electron transport chain)
d the krebs cycle

Explanation:

1. Recall ATP production in each process:

• Glycolysis (A) produces a net of 2 ATP.
• Fermentation (B) produces 2 ATP (from glycolysis, as fermentation is an extension without additional ATP from it directly in terms of high yield).
• Oxidative phosphorylation (electron transport chain, C) produces the majority of ATP in aerobic respiration, around 26 - 28 ATP per glucose molecule when combined with prior steps.
• The Krebs Cycle (D) produces 2 ATP (or GTP) directly, and some electron carriers that feed into oxidative phosphorylation.

1. Compare the ATP yields: Oxidative phosphorylation (C) has the highest ATP yield among the options.

Answer:

C. oxidative phosphorylation (electron transport chain)