Unit5TSG - UNIT 5 ONLINE QUIZZES 1. What does...

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UNIT 5 ONLINE QUIZZES 1. What does transformation involve in bacteria?. a) the creation of a strand of DNA from an RNA molecule b) the creation of a strand of RNA from a DNA molecule c) the infection of cells by a phage DNA molecule d) the type of semiconservative replication shown by DNA e) assimilation of external DNA into a cell 2. In trying to determine whether DNA or protein is the genetic material, Hershey and Chase made use of which of the following facts? a) DNA does not contain sulfur, whereas protein does. b) DNA contains phosphorus but protein does not. c) DNA contains nitrogen, whereas protein does not. d) A and B only e) A, B and C 3. Cytosine makes up 38% of the nucleotides in a sample of DNA from an organism. Approximately, what percentage of the nucleotides in this sample will be thymine? a) 12 b) 24 c) 31 d) 38 e) It can not be determined from the information provided 4. What kind of chemical bond is found between paired bases of the DNA helix? a) hydrogen b) ionic c) covalent d) sulfhydryl e) phosphate 5. The strands that make up DNA are antiparallel. This means that a) the twisting nature of DNA creates nonparallel strands. b) the 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strand. c) base pairings create unequal spacing between the two DNA strands. d) one strand is positively charged and the other is negatively charged. e) one strand contains only purines and the other contains only pyrimidines. 6. What is the function of DNA polymerase? a) to unwind the DNA helix during replication. b) to seal together the broken ends of DNA strands. c) to add nucleotides to the end of a growing DNA strand. d) to degrade damaged DNA molecules. e) to rejoin the two DNA strands (one new and one old) after replication.
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7. Enzyme that separates the DNA strands during replication a) helicase b) nuclease c) ligase d) DNA polymerase I e) primase 8. The leading and lagging strand differ in that a) the leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction. b) the leading strand is synthesized by adding nucleotides to the 3' end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5' end. c) the leading strand is synthesized continuously, whereas the lagging strand is short fragments that are ultimately stiched together. d)
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This note was uploaded on 03/22/2011 for the course BIO 101 taught by Professor Lubrano during the Spring '11 term at Moorpark College.

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Unit5TSG - UNIT 5 ONLINE QUIZZES 1. What does...

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