Multiple Choice
The unwinding of DNA at the replication fork causes twisting and strain in the DNA ahead of the fork, which is relieved by an enzyme called __________.
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14. DNA Synthesis
Steps of DNA Replication
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Which of the following is the correct order of steps in DNA replication?
A
Elongation, Initiation, Termination
B
Elongation, Termination, Initiation
C
Termination, Initiation, Elongation
D
Initiation, Elongation, Termination
Verified step by step guidance1
Understand that DNA replication is a biological process by which a cell duplicates its DNA, usually before cell division.
The first step in DNA replication is Initiation. During this phase, the DNA double helix is unwound by the enzyme helicase, creating a replication fork. This allows the replication machinery to access the DNA strands.
The second step is Elongation. In this phase, DNA polymerase enzymes add nucleotides to the growing DNA strand in a sequence complementary to the template strand. This process occurs in the 5' to 3' direction.
The final step is Termination. This occurs when the replication machinery reaches the end of the DNA molecule or a specific termination sequence, and the newly synthesized DNA strands are released.
Review the options given in the problem and match them with the correct sequence of steps: Initiation, Elongation, Termination.
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