Chapter 25 Questions & Answers

Chapter 25 Questions & Answers - 1) 2) 3) 4) 5) 6) 7)...

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Chapter 25 Metabolism 1) The sum of all of the biochemical processes going on within the human body at any given time is called A) Anabolism. B) Oxidative phosphorylation. C) Metabolism. D) Glycolysis. E) Catabolism. 2) Cells synthesize new organic components for which of the following reasons? A) Growth and repair B) To perform structural maintenance C) To produce secretions D) all of the above E) A and B only 3) During glycolysis A) A molecule of glucose is converted into two molecules of pyruvic acid. B) 6 molecules of ATP are produced. C) More energy is used than is released. D) NADH2 molecules attach to the cytochromes. E) Carbon dioxide is produced. 4) Inside the mitochondrion, each pyruvic acid molecule A) Forms a molecule of citric acid. B) Directly enters the electron transport system. C) Is phosphorylated. D) Attaches to NAD. E) Loses a carbon atom. 5) The TCA cycle A) Does not form any carbon dioxide. B) Contains enzymes called cytochromes. C) Begins with the formation of a molecule of citric acid. D) Directly produces most of the ATP from the catabolism of glucose. E) Forms acetyl-CoA from glucose-6-phosphate. 6) The carbon dioxide of respiration is formed during A) Electron transport. B) The formation of pyruvic acid. C) The TCA cycle. D) Glycolysis. E) The formation of water. 7) In the electron transport chain A) Oxidative phosphorylation takes place and ATP is formed. B) Oxidized molecules gain energy at the expense of reduced molecules. C) Coenzymes receive hydrogen atoms from NADH2 and FADH2. D) all of the above E) A and C only
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8) In glycolysis, each molecule of glucose that is metabolized releases how many molecules of ATP? A) 2 B) 4 C) 30 D) 36 E) 38 9) In the process of cellular respiration, each molecule of glucose that is metabolized yields enough energy to form ________ molecules of ATP. A) 2 B) 4 C) 30 D) 36 E) 38 10) During lipolysis A) Lipids are converted into glucose molecules. B) Triglycerides are converted into molecules of acetyl-CoA. C) Lipids are metabolized to yield ATP. D) Lipids are formed from excess carbohydrates. E) Triglycerides are broken down into glycerol and fatty acids. 11) All of the following are true of beta-oxidation, except that A) It occurs in the mitochondria. B) It requires coenzyme A, NAD, and FAD. C) It yields large amounts of ATP. D) Excess lipids are converted into glycogen molecules. E) It is the process that breaks down fatty acids into two-carbon fragments that can be metabolized by the TCA cycle. 12) Lipids A) Are easily mobilized from their reserves. B) Are difficult to store since they are not water soluble. C) Provide energy for cells with modest energy demands and for skeletal muscle when energy demands are low. D) Release less energy than an equivalent amount of glucose.
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This note was uploaded on 05/29/2011 for the course BIO 233 taught by Professor Salti during the Spring '11 term at Portland CC.

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Chapter 25 Questions & Answers - 1) 2) 3) 4) 5) 6) 7)...

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