DP Biology (last assessment 2024)

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Question 23M.1.HL.TZ2.26

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1.HL.TZ2.26
Level HL Paper 1 Time zone TZ2
Command term Question number 26 Adapted from N/A
26.
[Maximum mark: 1]
23M.1.HL.TZ2.26

Which part of aerobic respiration directly involves oxygen molecules?

A.  Conversion of glucose to pyruvate

B.  Accepting electrons from the electron transport chain

C.  Oxidizing acetyl groups in the Krebs cycle

D.  Production of NAD from reduced NAD

[1]

Markscheme

B

Examiners report

This question on the involvement of oxygen molecules in aerobic respiration statistically was the best question on the paper with a high discrimination index and 56% of the students answering correctly.

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