Chapter 21: Metabolism

Which statement is FALSE?

• A) ATP synthase forms ATP at the mitochondrion's inner membrane as protons diffuse into the matrix

• B) Copper is the only metal present in some of the complexes of the ETC

• C) the ETC takes place in the inner membrane of the mitochondria

• D) The ETC is the "preferred" dumping ground for electrons in terms of utilizing their energy for ATP synthesis.

Which statement is FALSE?

• A) Proteolysis liberates amino acids from a polypeptide.

• B) Lipogenesis is an anabolic process.

• C) Proteolysis is an anabolic process

• D) Glycogenesis stores glucose molecules

Which statement is FALSE?

• A) Losing body heat faster than it is being generated would likely cause the body to attempt to increase its metabolic rate.

• B) The amount of volume relative to surface area for an infant is lower than that of an average adult.

• C) Respirometers measure metabolic rate indirectly by relating oxygen consumption to calories burned.

• D) An infant loses less calories of heat/unit size/unit time to the atmosphere compared to that of an average adult.

Which statement is FALSE?

• A) The smell of ketones on one’s breath could suggest that the person is utilizing glucose as a primary source of energy.

• B) Ornithine is more related to protein metabolism than to fat metabolism.

• C) Ketones form from acetyl compounds made during decarboxylation of pyruvate and from beta-oxidation

• D) In brown fat, an electron derived from glycolysis provides energy for only two proton pumps in an ETC.

Glucose is absorbed with _____ through a symporter carrier protein.

• A) Sodium

• B) NAD+

• C) fructose

• D) NADH

Which statement is FALSE?

• A) The Krebs cycle relies on molecular oxygen indirectly

• B) The Krebs cycle relies on molecular oxygen directly

• C) The acetyl CoA molecules that form from pyruvate molecules and enter the Krebs cycles are formed in the mitochondria.

• D) Krebs cycles will not continue to occur unless there is molecular oxygen available in the mitochondrion.

Which statement is FALSE?

• A) NADH in the cytosol is oxidized either by a shuttle system in the mitochondrion or through fermentation

• B) The Krebs cycle causes FAD to become oxidized to form FADH2.

• C) Certain citric acid cycle reactions release electrons that may be picked up by either NAD+ or FAD.

• D) Enzymes oxidize compounds in glycolysis and the Krebs cycle and donate those electrons to coenzymes.

Which statement is FALSE?

• A) Glycogen phosphorylase adds a phosphate group to glucose molecules when they are removed from glycogen.

• B) ADP gains a phosphate molecule via substrate-level phosphorylation from GTP that was made in the Krebs cycle.

• C) Kinases are enzymes that add phosphate groups to molecules

• D) Coenzyme A binds with citric acid in the Krebs cycle.