DP Biology (last assessment 2024)

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Question 23M.1.HL.TZ1.38

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1.HL.TZ1.38
Level HL Paper 1 Time zone TZ1
Command term Question number 38 Adapted from N/A
38.
[Maximum mark: 1]
23M.1.HL.TZ1.38

What is contained in skeletal muscle?

A.  Cross bridges between muscle fibres

B.  Sarcomeres formed of contractile myofibrils

C.  Myosin filaments forming cross bridges with troponin and tropomyosin

D.  Multinucleate cells with numerous microfibrils made of contractile sarcomeres

[1]

Markscheme

D

Examiners report

Several teachers noticed that this question contained a typographical error. In the expected answer, the word microfibrils was used instead of myofibrils. Nevertheless, it was possible to eliminate all the other answers as they were certainly wrong and the relatively high discrimination index showed that the stronger candidates were mostly able to do this.

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