Question

select the correct answer. which important biochemical process receives a supply of nad+ ions from the fermentation process during anaerobic respiration? a. calvin cycle b. electron transport system c. glycolysis d. krebs cycle e. proton pump mechanism

Explanation:

To solve this, we analyze each option:

• Option A (Calvin cycle): Part of photosynthesis, not related to anaerobic respiration or fermentation’s NAD⁺ supply.
• Option B (Electron transport system): Requires oxygen (aerobic) and uses NADH, not directly receiving NAD⁺ from fermentation.
• Option C (Glycolysis): In anaerobic respiration, fermentation regenerates NAD⁺, which is then used by glycolysis to continue breaking down glucose. Glycolysis needs NAD⁺ (converted to NADH during glycolysis, and fermentation replenishes NAD⁺ for glycolysis to repeat).
• Option D (Krebs cycle): Aerobic process, does not rely on fermentation - derived NAD⁺.
• Option E (Proton pump mechanism): Involved in ATP synthesis (e.g., in ETS), not directly linked to fermentation - NAD⁺ supply.

Answer:

C. glycolysis