DP Biology (first assessment 2025)

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Question EXEX.2.HL.TZ0.4bi

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Date Example questions Example questions Marks available [Maximum mark: 1] Reference code EXEX.2.HL.TZ0.4bi
Level HL Paper 2 Time zone TZ0
Command term Outline Question number i Adapted from N/A
i.
[Maximum mark: 1]
EXEX.2.HL.TZ0.4bi
(i)

secretion of of surfactant.

[1]

Markscheme

(surfactant) reduces surface tension, preventing water from causing the walls of alveoli to adhere during exhalation/ alveoli from collapsing;

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