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Molecular Biology DNA Replication Quiz

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Questions and Answers

What is the primary function of DNA helicase during DNA replication?

To synthesize RNA primers

To separate the DNA strands using ATP (correct)

To relieve coiling ahead of the replication fork

To attach nucleotides in a 5' to 3' direction

DNA polymerase can initiate DNA synthesis on a bare template strand without additional components.

False

What is the role of DNA ligase during DNA replication?

To join adjacent DNA fragments together.

In the lagging strand, DNA is synthesized in fragments called ______.

Okazaki fragments Signup and view all the answers

Match the following components with their roles in DNA replication:

DNA topoisomerase = Relieves coiling ahead of the fork Single-strand binding proteins = Keeps parental strands open DNA primase = Synthesizes RNA primers DNA polymerase I = Removes RNA primers and fills in DNA Signup and view all the answers

Which model of DNA replication suggests that each new DNA molecule contains one original strand and one newly synthesized strand?

Semiconservative Signup and view all the answers

DNA replication occurs in one direction only, either 5’ to 3’ or 3’ to 5’.

False Signup and view all the answers

What is the role of a primer in DNA synthesis?

To provide a starting point for DNA polymerase to add nucleotides. Signup and view all the answers

The leading strand is synthesized _____ the direction of the replication fork.

in Signup and view all the answers

Match the following components of DNA replication with their descriptions:

Leading Strand = Synthesized continuously in the direction of the replication fork Lagging Strand = Synthesized discontinuously in short fragments Replication Fork = The junction where the DNA double helix is unwound DNA Polymerase = Enzyme that adds nucleotides to the growing DNA strand Signup and view all the answers