Chapter 7

Glycolysis starts and ends in the ___________. a. nucleus b. mitochondrion c. plasma membrane d. cytoplasm

Which of the following metabolic pathways require oxygen? a. aerobic respiration b. lactate fermentation c. alcoholic fermentation d. all of the above

Which molecule does not form during glycolysis? a. NADH b. pyruvate c. \(\mathrm{FADH}_{2}\) \(\mathrm{d} . \mathrm{ATP}\)

In eukaryotes, aerobic respiration is completed in the ___________. a. nucleus b. mitochondrion c. plasma membrane d. cytoplasm

The following reactions are part of the second stage of aerobic respiration: a. substrate-level phosphorylation b. acetyl-CoA formation c. Krebs cycle d. all of the above

In the third stage of aerobic respiration, _________ is the final acceptor of electrons from glucose. a. water b. hydrogen c. oxygen d. NADH

In alcoholic fermentation, ______________ is the final acceptor of electrons stripped from glucose. a. oxygen b. pyruvate c. acetaldehyde d. sulfate

Fermentation makes no more ATP beyond the small yield from glycolysis. The remaining reactions __________. a. regenerate FAD b. regenerate \(\mathrm{NAD}^{+}\) c. regenerate NADH d. regenerate FADH \(_{2}\)

Your body cells can use __________ as an alternative energy source when glucose is in short supply. a. fatty acids b. glycerol c. amino acids d. all of the above

Match the event with its most suitable description. __________glycolysis __________fermentation __________Krebs cycle __________electron transfer phosphorylation a. ATP, NADH, FADH \(\mathrm{CO}_{2},\) and water form b. glucose to two pyruvates c. \(\mathrm{NAD}^{+}\) regenerated, little ATP d. \(\mathrm{H}^{+}\) flows via ATP synthases