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Question at position 61 In DNA replication, which of the following enzymes adds new DNA nucleotides to a growing DNA strand?primaseDNA polymerase IIIDNA helicasetopoisomeraseDNA ligase
Options
A.primase
B.DNA polymerase III
C.DNA helicase
D.topoisomerase
E.DNA ligase
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Step-by-Step Analysis
Starting with how DNA replication proceeds, we need to identify which enzyme actually adds new nucleotides to a growing strand.
Option 1: primase. Primase lays down RNA primers to start synthesis, but it does not add DNA nucleotides to extend the chain. Its role is to pr......Login to view full explanationLog in for full answers
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Dr. Dre has decided that he wants to cure cancer and so has designed a bunch of compounds to inhibit various enzymes involved in DNA replication. He tests each of the 5 compounds against the enzymatic activity of each of the DNA replication enzymes and records what each one does to work out what they do. He concludes that [ Select ] Compound B Compound E Compound D Compound A Compound C would prevent the replacement of RNA sequences with DNA, while [ Select ] Compound B Compound C Compound D Compound A Compound E would prevent all steps in DNA replication. He predicts that [ Select ] Compound E Compound D Compound B Compound C Compound A would leave the replicated DNA strand as a series of separate DNA fragments, but that [ Select ] Compound A Compound B Compound D Compound E Compound C would lead to the death of the cell upon DNA replication. Finally, he concludes that [ Select ] Compound D Compound C Compound A Compound E Compound B would prevent the formation of both the leading and lagging strands.
Dr. Dre has decided that he wants to cure cancer and so has designed a bunch of compounds to inhibit various enzymes involved in DNA replication. He tests each of the 5 compounds against the enzymatic activity of each of the DNA replication enzymes and records what each one does to work out what they do. He concludes that [ Select ] Compound A Compound D Compound E Compound B Compound C would prevent the replacement of RNA sequences with DNA, while [ Select ] Compound C Compound B Compound E Compound A Compound D would prevent all steps in DNA replication. He predicts that [ Select ] Compound A Compound E Compound B Compound C Compound D would leave the replicated DNA strand as a series of separate DNA fragments, but that [ Select ] Compound C Compound D Compound B Compound E Compound A would lead to the death of the cell upon DNA replication. Finally, he concludes that [ Select ] Compound B Compound C Compound A Compound E Compound D would prevent the formation of both the leading and lagging strands.
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