Chapter 5 True/False

Carbon dioxide is produced only as a by-product of acetyl-CoA synthesis and the Krebs cycle during cellular respiration.

True

Enzymatic reactions reach a saturation point when the active sites of all enzymes present are occupied by substrate molecules.

True

ATP is made by substrate-level phosphorylation only during glycolysis.

False

Chloroplast structure features thylakoids arranged in stacks called stroma

False

Fermentation is more energy efficient than aerobic glucose metabolism.

False

Fermentation results in the production of carbon dioxide and water from pyruvic acid.

False

In feedback inhibition pathways, the end-product of the pathway is usually an inhibitor of the last enzyme in the pathway.

False

The carrier molecules in electron transport chains are all integral membrane proteins.

False

A holoenzyme is a combination of an apoenzyme bound to its particular cofactor.

True

Acidic pH breaks the hydrogen bonds that give enzymes their characteristic shapes, thereby denaturing them.

True