ch04 - Chapter 4 DNA, RNA, and the Flow of Genetic...

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Chapter 4 DNA, RNA, and the Flow of Genetic Information Matching Questions Use the following to answer questions 1-10: Choose the correct answer from the list below. Not all of the answers will be used. a) annealing b) mRNA molecules c) synonyms d) linear e) amino acid f) Tm g) retroviruses h) exon i) Erwin Chargaff j) release factor k) gene expression l) Rosalyn Franklin 1 ____________ The information-carrying intermediates of translation. Ans: b Section: Introduction 2 The flow of genetic information from DNA to protein is called ____________. Ans: k Section: Introduction 3 ____________ Scientist who noted the A:T and G:C ratios in DNA are approximately 1:1. Ans: i Section: 4.1 4 The temperature at which half the DNA helical character is lost is referred to as ____________. Ans: f Section: 4.2 5 DNA renaturation after melting is called ____________. Ans: a Section: 4.2 6 DNA can exist in both circular and ____________ forms. Ans: d Section: 4.2 Page 1
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Chapter 4 DNA, RNA, and the Flow of Genetic Information 7 ____________ Organisms in which the flow of genetic information can be RNA DNA. Ans: g Section: 4.3 8 Codons that specify the same amino acids are termed ____________. Ans: c Section: 4.5 9 A three-base codon defines a specific ____________. Ans: e Section: 4.5 10 Stop codons are read by ____________. Ans: j Section: 4.5 Fill in the Blank Questions 11 The enzyme that is capable of synthesizing DNA from an RNA template is __________________. Ans: reverse transcriptase Section: 4.3 12 __________________ is the most abundant type of RNA in a cell. Ans: Ribosomal RNA Section: 4.4 and Table 4.2. 13 Each amino acid residue in a protein is encoded by a set of three bases on mRNA referred to as a __________________. Ans: codon Section: 4.5 14 In an amino acyl-tRNA, the amino acid is attached to the CCA sequence at the _________ end of the tRNA. Ans: 3' Section: 4.4 15 mRNA higher organisms are formed by splicing together expressed regions after removal of __________________. Ans: introns Section: 4.6 16 In bacterial mRNA, the initiating AUG codon is preceded several nucleotides away by a purine- rich sequence called the __________________ , which base-pairs with a complimentary sequence in an rRNA. Ans: Shine-Dalgarno sequence Section: 4.5 Page 2 2
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Chapter 4 DNA, RNA, and the Flow of Genetic Information 17 The nucleoside that is composed of a D -ribose linked to a cytosine base is called __________________. Ans: cytidine Section: 4.1 18 The phenomenon that stacked bases in double-helical DNA absorbed less UV light than the unstacked bases in single-stranded DNA is referred to as _________________. Ans:
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ch04 - Chapter 4 DNA, RNA, and the Flow of Genetic...

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