Question

question 11
when glucose is used as the energy source, the largest amount of atp (26 atp) is produced in ____.
○a. glycolysis
○b. the krebs cycle
○c. electron transfer chain (etc)
○d. fermentation
○e. acetyl-coa formation

Explanation:

• Glycolysis produces a small amount of ATP (net gain of 2 ATP).
• The Krebs cycle produces a limited amount of ATP (2 ATP per glucose molecule).
• Fermentation has a low ATP yield (2 ATP).
• Acetyl - CoA formation does not produce a large amount of ATP.
• The electron transfer chain (ETC) is where the majority of ATP is synthesized during cellular respiration when glucose is the energy source. Through oxidative phosphorylation in the ETC, a large number of ATP (about 26 - 28 ATP from the NADH and FADH₂ produced in previous steps) are generated.

Answer:

C. electron transfer chain (ETC)