CH17_Study_Questions

Biology with MasteringBiology™ (8th Edition)

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Unformatted text preview: 1 Chapter 17 Study Questions Multiple ‐ Choice Questions 1) Garrod hypothesized that "inborn errors of metabolism" such as alkaptonuria occur because A) genes dictate the production of specific enzymes, and affected individuals have genetic defects that cause them to lack certain enzymes. B) enzymes are made of DNA, and affected individuals lack DNA polymerase. C) many metabolic enzymes use DNA as a cofactor, and affected individuals have mutations that prevent their enzymes from interacting efficiently with DNA. D) certain metabolic reactions are carried out by ribozymes, and affected individuals lack key splicing factors. E) metabolic enzymes require vitamin cofactors, and affected individuals have significant nutritional deficiencies. Answer: A Topic: Concept 17.1 Skill: Knowledge/Comprehension The following questions refer to Figure 17.1, a simple metabolic pathway: Figure 17.1 2) According to Beadle and Tatum's hypothesis, how many genes are necessary for this pathway? A) 0 B) 1 C) 2 D) 3 E) It cannot be determined from the pathway. Answer: C Topic: Concept 17.1 Skill: Application/Analysis 3) A mutation results in a defective enzyme A. Which of the following would be a consequence of that mutation? A) an accumulation of A and no production of B and C B) an accumulation of A and B and no production of C C) an accumulation of B and no production of A and C D) an accumulation of B and C and no production of A E) an accumulation of C and no production of A and B Answer: A Topic: Concept 17.1 Skill: Application/Analysis 2 4) If A, B, and C are all required for growth, a strain that is mutant for the gene encoding enzyme A would be able to grow on which of the following media? A) minimal medium B) minimal medium supplemented with nutrient "A" only C) minimal medium supplemented with nutrient "B" only D) minimal medium supplemented with nutrient "C" only E) minimal medium supplemented with nutrients "A" and "C" Answer: C Topic: Concept 17.1 Skill: Application/Analysis 5) If A, B, and C are all required for growth, a strain mutant for the gene encoding enzyme B would be capable of growing on which of the following media? A) minimal medium B) minimal medium supplemented with "A" only C) minimal medium supplemented with "B" only D) minimal medium supplemented with "C" only E) minimal medium supplemented with nutrients "A" and "B" Answer: D Topic: Concept 17.1 Skill: Application/Analysis 6) The nitrogenous base adenine is found in all members of which group? A) proteins, triglycerides, and testosterone B) proteins, ATP, and DNA C) ATP, RNA, and DNA D) alpha glucose, ATP, and DNA E) proteins, carbohydrates, and ATP Answer: C Topic: Concept 17.1 Skill: Knowledge/Comprehension 7) Using RNA as a template for protein synthesis instead of translating proteins directly from the DNA is advantageous for the cell because A) RNA is much more stable than DNA....
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CH17_Study_Questions - 1 Chapter 17 Study Questions...

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