Practice Exam 4_Answers.pdf - Practice Exam 4 1 Which of...

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Practice Exam 4 1. Which of the following nitrogen base composes guanosine? C 2. Which of the following nucleotide is found in DNA? C 3. The primary structure of DNA is, a) the sequence of the pentose sugars in the strand b) is read from the sugar with the free 3ʹ - OH group to the sugar with the free 5ʹ -phosphate c) the sequence of the nitrogen bases of the DNA strand
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Practice Exam 4 d) the sugar-phosphate backbone of the strand 4. The two polynucleotide strands in the DNA double helix is stabilized by, a) van der Waals forces b) slat bridges c) phosphoester bonds d) hydrogen bonds 5. Complimentary base pairing is, a) the bases on one DNA strand forming H-bonds with only one specific base on the opposite DNA strand b) The pairs AU and CG c) Adenine from one strand pairs with thymine only on the opposite strand and cytosine pairs with uracil only c) two polynucleotide strands winding about each other d) inter-wined sugar-phosphate backbone 6. Nucleic acids are polymers of many nucleotides bonded by the _________ group of the sugar in one nucleotide with the __________ of the sugar in the next nucleotide. a) 5' OH group, 3' PO 4 3- group b) 3' OH group, 5' PO 4 3- group c) 3' OH group, 3' PO 4 3- group d) 5'-OH group, 5' PO 4 3- group 7. The primary structure of nucleic acid is, a) the sequence of deoxyribose sugar and phosphate backbone b) the sequence of peptide bonds c) the DNA double helix d) the sequence of purine and pyrimidine N-bases in the strand
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Practice Exam 4 8. In the DNA double helix, a) is the polynucleotide strand b) the sugars and phosphate groups are inter-wined in helical manner c) one strand goes from the 5ʹ to 3ʹ direction and the other strand go es in the 3ʹ to 5ʹ direction d) the double helix formed by pairing of adenine with uracil and guanine with cytosine 9. The complimentary base pairing in DNA is, a) AT and GC base pairing in the DNA double helix b) AC and GT base pairing in the DNA double helix c) AU and GT base pairing in the DNA double helix d) AG and CT base pairing in the DNA double helix 10. Which nucleotide is found in DNA but not in RNA? a)uridine - -monophosphate b) guanosine - -monophosphate c) adenosine - -monophosphate d) deoxyadenosine- -monophosphate 11. What are the components of a nucleotide? a) two nitrogen bases and a pentose sugar b) a nitrogen base, pentose sugar and a phosphate group c) two phosphate groups and a pentose sugar d) a phosphate group, a ribose, deoxyribose and a nitrogen base
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Practice Exam 4 12. The phosphodiester bond formation in DNA replication is catalyzed by, a) DNA helicase b) amylase c) DNA polymerase d) DNA depolymerase 13. What is the complimentary base sequence for the segment of DNA strand -ACGATAT- 3ʹ?
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