DP Biology (first assessment 2025)

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Question 19M.2.SL.TZ2.2b

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.SL.TZ2.2b
Level SL Paper 2 Time zone TZ2
Command term Determine Question number b Adapted from N/A
b.
[Maximum mark: 2]
19M.2.SL.TZ2.2b
(b)

Determine, with a reason, the nucleotide base that was marked with radioactivity.

Base:

Reason:

 

 

[2]

Markscheme

a. thymine / T ✔

b. because only in DNA / not in RNA ✔

Examiners report

Few were able to name thymine as the base or give a reason it was used in the experiment.

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