DP Biology (first assessment 2025)

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Question SPM.1A.HL.TZ0.22

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Date May Specimen-2023 Marks available [Maximum mark: 1] Reference code SPM.1A.HL.TZ0.22
Level HL Paper 1A Time zone TZ0
Command term Question number 22 Adapted from N/A
22.
[Maximum mark: 1]
SPM.1A.HL.TZ0.22

Which role does positive feedback play in fruit ripening?


A.  The production of ethylene leads to fruit ripening, which stops the production of ethylene.

B.  The production of ethylene leads to fruit ripening, which causes more ethylene production.

C.  The production of RuBP leads to fruit ripening, which stops the production of RuBP.

D.  The production of RuBP leads to fruit ripening, which causes more RuBP production.

[1]

Markscheme

B

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