DP Biology (last assessment 2024)
Question 18M.1.HL.TZ2.38
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.1.HL.TZ2.38 |
| Level | HL | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 38 | Adapted from | N/A |
38.
[Maximum mark: 1]
18M.1.HL.TZ2.38
The diagram shows two states of skeletal muscle, relaxed and contracted.
[Source: Provophys/Wikipedia. File licensed under CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0/)]
Which process is part of muscle contraction?
A. Myosin filaments cause the actin filaments to shorten.
B. Ca2+ from the sarcoplasmic reticulum binds to the myosin heads.
C. ATP provides energy for the movement of the myosin heads.
D. Ca2+ binds to tropomyosin and uncovers troponin.
[1]
Markscheme
C
