DP Biology (first assessment 2025)

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Question 19N.1A.HL.TZ0.28

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.1A.HL.TZ0.28
Level HL Paper 1A Time zone TZ0
Command term Identify Question number 28 Adapted from N/A
28.
[Maximum mark: 1]
19N.1A.HL.TZ0.28

The graph shows an action potential.

 

What is the threshold potential for this cell?

A. –80 mV

B. –70 mV

C. –55 mV

D. 40 mV

[1]

Markscheme

C

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