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DNA Replication Process Overview

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Questions and Answers

Which enzyme is responsible for the replication of the mitochondrial genome?

DNA polymerase gamma (correct)

DNA polymerase delta

RNA polymerase

Helicase

What type of molecules do the remaining genes in the mitochondrial DNA provide instructions for making?

Proteins

Transfer RNAs (tRNAs) and ribosomal RNAs (rRNAs) (correct)

Lipids

Carbohydrates

What is the purpose of the Okazaki fragments in DNA replication?

To serve as templates for leading strand replication

To form the replication eye

To initiate DNA replication at the origin

To replicate the lagging strand discontinuously (correct)

Which enzyme is responsible for unwinding the DNA double helix during replication?

Helicase Signup and view all the answers

What is the main function of single-strand binding proteins during DNA replication?

Prevention of DNA strands from re-annealing Signup and view all the answers

What is the primary function of DNA replication?

To create an exact copy of the DNA molecule Signup and view all the answers

Which of the following enzymes is responsible for relieving torsional stress on the DNA molecule during replication?

Topoisomerase Signup and view all the answers

What is the direction in which DNA polymerase reads and synthesizes the new DNA strand?

3' to 5' for reading, 5' to 3' for synthesis Signup and view all the answers

What is the role of single-strand binding proteins (SSBPs) in DNA replication?

To keep the DNA strands separated at the replication fork Signup and view all the answers

Which of the following statements about DNA polymerase is correct?

It can only add nucleotides to a growing polymer with a free 3' OH group Signup and view all the answers

What is the role of the enzyme primase in DNA replication?

To synthesize short RNA chains called RNA primers Signup and view all the answers

What is the role of DNA polymerase I in DNA replication?

Responsible for removing RNA primers and replacing them with DNA Signup and view all the answers

Which of the following statements about the leading and lagging strands during DNA replication is correct?

Leading strand synthesis is continuous, while lagging strand synthesis is discontinuous Signup and view all the answers

Which enzyme is responsible for joining the Okazaki fragments during DNA replication?

Ligase Signup and view all the answers

What is the primary function of DNA polymerase III in prokaryotes?

DNA replication at a rate of 1000 nucleotides per second Signup and view all the answers

Which of the following enzymes is responsible for unwinding the parental double helix during DNA replication?