17_TestBank_TB

17_TestBank_TB - Biology 7e(Campbell Chapter 17 From Gene...

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Biology, 7e (Campbell) Chapter 17: From Gene to Protein Chapter Questions 6) We now know that the one gene-one enzyme hypothesis is not entirely accurate because A) many genes code for proteins that are not enzymes. B) a single gene codes for a single polypeptide chain, and many enzymes are made up of more than one polypeptide chain. C) many genes code for RNA molecules that have no enzymatic activity. D) A and B only E) A, B, and C Answer: E Topic: Concept 17.1 Skill: Comprehension 7) Which of the following represents a similarity between RNA and DNA? A) Both are double-stranded. B) the presence of uracil C) the presence of an OH group on the 2' carbon of the sugar D) nucleotides consisting of a phosphate, sugar, and nitrogenous base E) Both are found exclusively in the nucleus. Answer: D Topic: Concept 17.1 Skill: Comprehension 10) If proteins were composed of only 12 different kinds of amino acids, what would be the smallest possible codon size in a genetic system with four different nucleotides? A) 1 B) 2 C) 3 D) 4 E) 12 Answer: B Topic: Concept 17.1 Skill: Application 11) An extraterrestrial life form is discovered. It has a genetic code much like that of organisms on Earth except that there are five different DNA bases instead of four and the base sequences are translated as doublets instead of triplets. How many different amino acids could be accommodated by this genetic code? A) 5 B) 10 C) 25 D) 64 E) 32 Answer: C Topic: Concept 17.1 Skill: Application 1
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13) A particular triplet of bases in the template strand of DNA is AGT. The corresponding codon for the mRNA transcribed is A) AGT. B) UGA. C) TCA. D) ACU. E) either UCA or TCA, depending on wobble in the first base Answer: D Topic: Concept 17.1 Skill: Application The following questions refer to Figure 17.1, a table of codons. Figure 17.1 14) A possible sequence of nucleotides in the template strand of DNA that would code for the polypeptide sequence phe-leu-ile-val would be 2
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A) 5' TTG-CTA-CAG-TAG 3'. B) 3' AAC-GAC-GUC-AUA 5'. C) 5' AUG-CTG-CAG-TAT 3'. D) 3' AAA-AAT-ATA-ACA 5'. E) 3' AAA-GAA-TAA-CAA 5'. Answer: E Topic: Concept 17.1 Skill: Application 15) What amino acid sequence will be generated, based on the following mRNA codon sequence? 5'AUG-UCU-UCG-UUA-UCC-UUG A) met-arg-glu-arg-glu-arg B) met-glu-arg-arg-gln-leu C) met-ser-leu-ser-leu-ser D) met-ser-ser-leu-ser-leu E) met-leu-phe-arg-glu-glu Answer: D Topic: Concept 17.1 Skill: Application 17) What is the sequence of a peptide based on the mRNA sequence 5' UUUUCUUAUUGUCUU 3' ? A) leu-cys-tyr-ser-phe B) cyc-phe-tyr-cys-leu C) phe-leu-ile-met-val D) leu-pro-asp-lys-gly E) phe-ser-tyr-cys-leu Answer: E Topic: Concept 17.1 Skill: Application 18) Suppose the following DNA sequence was mutated from 3' AGAGAGAGAGAGAGAGAG 5' to 3' AGAAGAGAGATCGAGAGA 5'. What amino acid sequence will be generated based on this mutated DNA? A) arg-glu-arg-glu-arg-glu
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This note was uploaded on 01/04/2012 for the course BIOL 123 taught by Professor Chen during the Spring '11 term at Georgia Tech.

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17_TestBank_TB - Biology 7e(Campbell Chapter 17 From Gene...

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