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1.) What type of enzyme in the replisome catalyzes addition of nucleotides to the growing DNA...

1.) What type of enzyme in the replisome catalyzes addition of nucleotides to the growing DNA strands?

A.   recombinase B.   transcriptase C.   polymerase D.   gyrase E.   helicase

2.) Regarding question 1, How many of these would be required if a new round of DNA replication began before the first one terminated?

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Answer #1

DNA replication is the process by which a DNA molecule produces its identical copies. It is a type of self-duplication or self-replication of DNA, where two daughter DNA molecules are formed from a single DNA molecule. Synthesis of a new DNA molecule is a complex process involving a series of steps, namely initiation, elongation and termination. Each step requires specific enzymes. The DNA polymerase is required for the synthesis of the new DNA strand from the existing strand. The trombone model of DNA synthesis Leading strand DNA polymerase 5 3OH tau-protein gama-complex Sliding clamp 5 3 3 5 5 DNA helicase SSB bound_ Lagging strand DNA polymerase The speed of the DNA replication depends on the activity of the DNA polymerase to read the existing bases and add the complementary bases to the template strand. Polymerization of DNA occurs in 5-3 direction. While synthesizing new DNA, on the leading strand, synthesis occurs in continuous manner and on the lagging strand, synthesis occurs in discontinuous manner which produces short DNA fragments called Okazaki fragments The leading strand always involve daughter DNA segment and lagging strand always involve parent DNA segment. Thus, the correct option is (C) Nearly (12) polymerases are required if a new round of DNA replication began before the first one terminated.

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