DP Biology (first assessment 2025)

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Question 23M.1A.HL.TZ2.23

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Date May 2023 Marks available [Maximum mark: 0] Reference code 23M.1A.HL.TZ2.23
Level HL Paper 1A Time zone TZ2
Command term Question number 23 Adapted from N/A
23.
[Maximum mark: 0]
23M.1A.HL.TZ2.23

What happens to an RNA molecule in eukaryotes after transcription in order to process it into mRNA?

A.  Introns are added.

B.  Exons are removed.

C.  Adenine nucleotides are added at the 3’ end.

D.  Adenine nucleotides are removed from the 5’ end.

Markscheme

C

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