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Question 20N.1.HL.TZ0.25

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1.HL.TZ0.25
Level HL Paper 1 Time zone TZ0
Command term Question number 25 Adapted from N/A
25.
[Maximum mark: 1]
20N.1.HL.TZ0.25

The graph shows the changing membrane potential during a nerve impulse. Which letter indicates when the potassium channels open?

[1]

Markscheme

C

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