AP BIOLOGY

CELL DIVISION

THE CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the role of enzymes in the DNA replication process?
A
Enzymes read the DNA code and build a new DNA molecule from scratch.
B
Enzymes link together to form a template for a new DNA molecule to be built.
C
Enzymes split the DNA molecule into two rails and then transport corresponding nitrogenous bases to each rail.
D
Enzymes link adjacent nucleosides together, becoming an integral part of the structure of the new strands of DNA
Explanation: 

Detailed explanation-1: -The correct option is C. Enzymes split the DNA molecule into two rails and then transport corresponding nitrogenous bases to each rail.

Detailed explanation-2: -The enzymes involved in DNA replication act in a coordinated manner to synthesize both leading and lagging strands of DNA simultaneously at the replication fork (Figure 5.11). This task is accomplished by the formation of dimers of the replicative DNA polymerases (polymerase III in E.

Detailed explanation-3: -Enzymes link together to form a template for a new DNA molecule to be built. Enzymes split the DNA molecule into two rails and then transport corresponding nitrogen bases to each rail. Enzymes link adjacent nucleosides together, becoming an integral part of the structure of the new strands of DNA.

Detailed explanation-4: -Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.

Detailed explanation-5: -In addition to DNA polymerase, other enzymes such as DNA primase, DNA helicase, DNA ligase, and topoisomerase are required for DNA replication.

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