DP Biology (first assessment 2025)

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Question 19M.1A.HL.TZ2.12

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.HL.TZ2.12
Level HL Paper 1A Time zone TZ2
Command term Determine Question number 12 Adapted from N/A
12.
[Maximum mark: 1]
19M.1A.HL.TZ2.12

What are the functions of DNA primase and DNA polymerase I in DNA replication?

[1]

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D

Examiners report

In Topic 7.1 it says that the proteins and enzymes involved in DNA replication should include helicase, DNA gyrase, single strand binding proteins, DNA primase and DNA polymerases I and III. There was a complaint in the G2s mentioning that DNA primase is really RNA primase. This is a misunderstanding, as it is really an RNA polymerase. This question showed the highest discrimination index.

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