DP Biology (first assessment 2025)
Question 21M.1A.HL.TZ2.30
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.1A.HL.TZ2.30 |
| Level | HL | Paper | 1A | Time zone | TZ2 |
| Command term | Question number | 30 | Adapted from | N/A |
30.
[Maximum mark: 1]
21M.1A.HL.TZ2.30
What molecule functions as the final electron acceptor in the mitochondrial electron transport chain?
A. Oxygen
B. ATP
C. Reduced NAD
D. Reduced FAD
[1]
Markscheme
A
Examiners report
According to the statistics, this question had the highest discrimination index with response C being the most popular incorrect response.
