Chapter 4 DNA,RNA,and the Flow of Genetic Information 7 The nucleoside that is composed of a D-ribose linked to a cytosine base is called Ans:cytidine Section:4.1 8 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:hypochromism or the hypochromic effect Section:4.2 9 DNA polymerase reads the template strand in the direction. Ans:3'to 5'Section:4.3 10 In DNA and RNA synthesis,the new strand growth is always in the direction. Ans:5'to 3'Section:4.3 Multiple Choice Questions 1 The difference in RNA bases compared to DNA bases is A)RNA contains A instead of T. D)RNA contains A instead of U. B) RNA contains U instead of G. E) None of the above. C) RNA contains U instead of T. Ans:C Section:4.1 2 How does a nucleotide differ from a nucleoside? A) Nucleosides are found in DNA,whereas nucleotides are found in RNA B) Purines are only found in nucleotides. C) Nucleosides contain only deoxyribose sugars. D) A nucleotide is a nucleoside with a phosphate ester linked to the sugar E) None of the above. Ans:D Section:4.1 3 What is the nucleotide sequence on the DNA template strand that yields the CUA codon for leucine? A)AUC D) GAT B) TAG E) CUA C)CTA Ans:B Section:4.5 4 How many different sequence possibilities are there for a DNA polymer that is 10 bases long? A)262,144B)40C)4000D)1,048,576E)100,000 Ans:D Section:4.1 5 The technique(s)used by Franklin and Wilkins to deduce the structure of DNA was A)absorbance spectrophotometry. D)All of the above. B)electron microscopy. E) None of the above. C)X-ray diffraction. Ans:C Section:4.2 Page 3Chapter 4 DNA, RNA, and the Flow of Genetic Information Page 3 3 7 The nucleoside that is composed of a D-ribose linked to a cytosine base is called __________________. Ans: cytidine Section: 4.1 8 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: hypochromism or the hypochromic effect Section: 4.2 9 DNA polymerase reads the template strand in the ______________ direction. Ans: 3' to 5' Section: 4.3 10 In DNA and RNA synthesis, the new strand growth is always in the ___________ direction. Ans: 5' to 3' Section: 4.3 Multiple Choice Questions 1 The difference in RNA bases compared to DNA bases is A) RNA contains A instead of T. D) RNA contains A instead of U. B) RNA contains U instead of G. E) None of the above. C) RNA contains U instead of T. Ans: C Section: 4.1 2 How does a nucleotide differ from a nucleoside? A) Nucleosides are found in DNA, whereas nucleotides are found in RNA. B) Purines are only found in nucleotides. C) Nucleosides contain only deoxyribose sugars. D) A nucleotide is a nucleoside with a phosphate ester linked to the sugar . E) None of the above. Ans: D Section: 4.1 3 What is the nucleotide sequence on the DNA template strand that yields the CUA codon for leucine? A) AUC D) GAT B) TAG E) CUA C) CTA Ans: B Section: 4.5 4 How many different sequence possibilities are there for a DNA polymer that is 10 bases long? A) 262,144 B) 40 C) 4000 D) 1,048,576 E) 100,000 Ans: D Section: 4.1 5 The technique(s) used by Franklin and Wilkins to deduce the structure of DNA was A) absorbance spectrophotometry. D) All of the above. B) electron microscopy. E) None of the above. C) X-ray diffraction. Ans: C Section: 4.2