Question

anaerobic respiration allows a cell to break down carbohydrates in the absence of oxygen. identify how nad⁺ is used by animal cells during anaerobic respiration. nad⁺ is converted to nadh during fermentation and used for anaerobic respiration to begin. when nadh is converted to nad⁺ during fermentation, energy needed to make pyruvate is released. in anaerobic conditions, the nad⁺ produced during fermentation is used as energy in place of atp. fermentation pathways yield two atp molecules, which the cell uses to continue glycolysis. glycolysis requires nad⁺ produced from fermentation to produce atp.

Explanation:

In animal - cell anaerobic respiration (lactic - acid fermentation), glycolysis first occurs which requires NAD⁺. During glycolysis, glucose is broken down into pyruvate and NAD⁺ is reduced to NADH. Then, in fermentation, NADH is oxidized back to NAD⁺ so that glycolysis can continue to produce ATP. Glycolysis needs NAD⁺ to accept electrons and hydrogen ions during the oxidation of glucose - derived intermediates.

Answer:

Glycolysis requires NAD⁺ produced from fermentation to produce ATP.