AP BIOLOGY

Detailed explanation-1: -In anaerobic respiration, glucose is the only reactant, which also makes option D incorrect, as glucose and carbon dioxide are listed as reactants here. While animal cells produce lactic acid when they carry out anaerobic respiration, yeast cells produce ethanol and carbon dioxide.

Detailed explanation-2: -Overview of pyruvate oxidation Pyruvate-three carbons-is converted to acetyl CoA, a two-carbon molecule attached to coenzyme A. A molecule of coenzyme A is a necessary reactant for this reaction, which releases a molecule of carbon dioxide and reduces a NAD+ to NADH.

Detailed explanation-3: -If the food is broken down with the use of oxygen, it is called aerobic respiration. If the breakdown occurs without the use of oxygen, the respiration is called anaerobic respiration. During heavy exercise when the supply of oxygen to our muscle cells is insufficient, food breakdown is by anaerobic respiration.