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Quiz 9 2006 key

Quiz 9 2006 key - Quiz 9 Key Fall 2006 Bio 181 Sections 7...

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Quiz 9 Key, Fall 2006 Bio 181, Sections 7, 8H Current evidence indicates that replication complexes are attached to stationary nuclear components and that DNA is threaded through these complexes. Which of the following best describes the role of the replication complex? 1. The complex acts as an enzymatic center for DNA replication. 2. The complex binds specifically to replication origins, then controls the rate at which replication occurs. 3. The complex is the initiating site of replication forks. 4. All of the above The lagging daughter strand of DNA is synthesized in what appears to be the “wrong” direction. This synthesis is accomplished by 1. synthesizing short Okazaki fragments in a 5´-to-3´ direction. 2. synthesizing multiple short RNA primers to initiate DNA replication. 3. using DNA polymerase I to remove RNA primers from Okazaki fragments. 4. All of the above RNA primers are necessary in DNA synthesis because 1. DNA polymerase is unable to initiate replication without an origin. 2. the DNA polymerase enzyme can only catalyze the addition of deoxyribonucleotides onto the 3´ (—OH) end of an existing strand.
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