DP Biology (first assessment 2025)

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Question 22M.2.SL.TZ1.a

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Date May 2022 Marks available [Maximum mark: 3] Reference code 22M.2.SL.TZ1.a
Level SL Paper 2 Time zone TZ1
Command term Draw Question number a Adapted from N/A
a.
[Maximum mark: 3]
22M.2.SL.TZ1.a

Draw a labelled diagram to show the structure of a single nucleotide of RNA.

[3]

Markscheme
  1. ribose drawn as a pentagon and labelled;
  2. base linked correctly (to C1) of ribose and labelled;
  3. phosphate linked correctly (to C5) of ribose and labelled;

Award [2 max] if more than one nucleotide drawn.

“Sugar” alone is insufficient.

Examiners report

Occasionally, deoxyribose was seen rather ribose; sometimes more than one nucleotide was shown limiting maximum marks.

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