DP Biology (first assessment 2025)

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Question 21M.2.HL.TZ1.1a.i

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.2.HL.TZ1.1a.i
Level HL Paper 2 Time zone TZ1
Command term Deduce Question number a.i Adapted from N/A
a.i.
[Maximum mark: 1]
21M.2.HL.TZ1.1a.i
(a.i)

Deduce the concentration of ZDV that would cause a 50 % reduction in root growth compared to the control.

[1]

Markscheme

75 μmol ✔

Allow answers in the range of 70 µmol–80 µmol.

Examiners report

Part (ii) was better answered than part (i) as many answers provided were outside the acceptable range of answers.

Syllabus sections