DP Biology (first assessment 2025)

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Question 21N.1A.SL.TZ0.2

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.1A.SL.TZ0.2
Level SL Paper 1A Time zone TZ0
Command term Question number 2 Adapted from N/A
2.
[Maximum mark: 1]
21N.1A.SL.TZ0.2

Which features of phospholipids give them their amphipathic properties?

A. Basic phosphate groups and acidic lipids

B. Acidic phosphate groups and basic lipids

C. Hydrophobic phosphate groups and hydrophilic fatty acids

D. Hydrophilic phosphate groups and hydrophobic fatty acids

[1]

Markscheme

D

Examiners report

A G2 comment was made that the terms acidic and basic are not part of the program, but they are commonly used terms in biochemistry and in this question were only used in distractors, so candidates could identify the correct answer without being sure about them.

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