AS Quiz 05 CH375 2007-2

AS Quiz 05 CH375 2007-2 - a. The strands are not...

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CH375 Introduction to Biology 2007-2 Cadet _____________________________ 30 point quiz No. 5 I hour Match the following with the best choice on the right (3 points each). 1 . Width of DNA molecule G A. 4 nm 2 . Height per turn of double helix D B. ribose 3 . Base pairs per turn F C. 8 4 . Number of hydrogen bonds between guanine and cytosine I D. 3.4 5 . Sugar in DNA H E. 4.3 F. 10 G. 2 nm H. Deoxyribose I. 3 J. 2 6. (5 pts) What is the function of primase? a. It opens the double helix to allow for replication. b. It adds RNA nucleotides to start synthesis. c. It adds DNA nucleotides to start synthesis. d. It seals the phosphodiester backbone. 7. (5 pts) What is the function of helicase? a. It opens the double helix to allow for replication. b. It adds RNA nucleotides to start synthesis. c. It adds DNA nucleotides to start synthesis. d. It seals the phosphodiester backbone. 8. (5 pts) Why are the leading strand and lagging strand of DNA synthesized in slightly different ways?
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Unformatted text preview: a. The strands are not synthesized differently. b. The strands are anti-parallel. c. The leading strand is DNA the lagging strand is RNA. d. The leading strand is from Venus and the lagging strand is from Mars. Extra credit (4 pts) One of the original experiments demonstrating that DNA is the genetic material involved cute, fuzzy little mice and the big bad Streptococcus pneumonia . Briefly describe this experiment. Dead smooth cells which produce exopolysaccharide were mixed with live rough cells which did not make the exopolysaccharide. The mixture was injected into mice and they died. The DNA from the smooth cells was taken up by the rough cells. The cells transformed and were able to make the virulence factor and kill the mice....
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