DP Biology (first assessment 2025)

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Question 21M.1A.HL.TZ2.38

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.HL.TZ2.38
Level HL Paper 1A Time zone TZ2
Command term Question number 38 Adapted from N/A
38.
[Maximum mark: 1]
21M.1A.HL.TZ2.38

The diagram shows structures involved in contraction of a sarcomere.

[Source: Anatomy & Physiology by Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Devon Quick & Jon Runyeon is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (https://creativecommons.org/licenses/by-sa/4.0/), except where otherwise noted.]

 

What is X?

A. Myosin filament

B. Sarcomere

C. Actin filament

D. Myofibril

[1]

Markscheme

C

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