ch25 - Exam Name___________________________________...

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Unformatted text preview: Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The sum of all of the biochemical processes going on within the human body at any given time is called A) metabolism. B) oxidative phosphorylation. C) anabolism. D) catabolism. E) glycolysis. 1) 2) Cells synthesize new organic components for which of the following reasons? A) growth and repair B) structural maintenance C) secrete D) all of the above E) A and B only 2) 3) During glycolysis A) two molecules of ATP are consumed B) a molecule of glucose is converted into two molecules of pyruvic acid. C) four molecules of ATP are produced. D) A and B only E) A, B, and C 3) 4) Inside the mitochondrion, each pyruvic acid molecule A) attaches to NAD. B) forms a molecule of citric acid. C) is phosphorylated. D) enters the electron transport system. E) loses a carbon atom. 4) 5) The TCA cycle A) begins with the formation of a molecule of citric acid. B) consumes two moles of carbon dioxide. C) contains enzymes called cytochromes. D) forms acetyl- CoA from glucose- 6- phosphate. E) directly produces most of the ATP from the catabolism of glucose. 5) 6) The carbon dioxide of respiration is formed during A) the formation of water. B) the formation of pyruvic acid. C) glycolysis. D) the TCA cycle. E) electron transport. 6) 1 7) In the electron transport chain A) oxidative phosphorylation leads to ATP formation. B) NADH and FADH 2 donate hydrogen atoms. C) reduced molecules transfer energy to ATP formation. D) all of the above E) A and C only 7) 8) In glycolysis, each molecule of glucose that is catabolized gives a net yield of how many molecules of ATP? A) 36 B) 2 C) 38 D) 30 E) 4 8) 9) In the process of cellular respiration (glycolysis + oxidative), each molecule of glucose that is metabolized yields enough energy to form ________ molecules of ATP. A) 72 B) 4 C) 2 D) 36 E) 28 9) 10) During lipolysis A) triglycerides are converted into molecules of acetyl- CoA. B) lipids are converted into glucose molecules. C) triglycerides are broken down into glycerol and fatty acids. D) lipids are formed from excess carbohydrates. E) lipids are metabolized to yield ATP. 10) 11) All of the following are true of beta- oxidation, except that A) it requires coenzyme A, NAD, and FAD. B) it occurs in the mitochondria. C) lipids are converted into glycogen molecules. D) fatty acids break down into two- carbon fragments that enter the TCA cycle. E) it yields large amounts of ATP. 11) 12) Lipids A) are difficult to store since they are not water soluble. B) provide energy for cells with modest energy demands. C) deliver somewhat less energy than an equivalent mass of glucose....
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ch25 - Exam Name___________________________________...

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