7) The activity of helicase will have what effect on double-stranded DNA? A) The

Question

7) The activity of helicase will have what effect on double-stranded DNA? A) The spontaneous rate of mutation will become highly elevated. B) The strands will eventually separate due to breaking of covalent bonds. C) The strands will eventually separate due to breaking of hydrogen bonds. D) All of the above E) A and C 8) Which enzyme is involved in the formation of negative su percoils (negative supercoiling) in DNA? A) Topoisomerase I B) Topoisomerase N C) Topoisomerase X D) The topoisomerase-catalase complex E) None of the above 9) DNA replication requires a free hydroxyl (-OH) group at which carbon of the growing chain'? A) 3 B) 3' C) 5 D) 5' E) None of the above

Explanation / Answer

7. The strands will eventually separate by breaking of hydrogen bonds.

8. Topoisomerase N

9. 3'

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