Date | May 2022 | Marks available | 1 | Reference code | 22M.1.HL.TZ2.38 |
Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
Command term | Question number | 38 | Adapted from | N/A |
Question
The electron micrograph shows sarcomeres in myofibrils of striated muscle during muscle contraction. The lines P–Q and R–S show two regions of one sarcomere.
[Source: Republished with permission of Elsevier - Health Sciences Division from Cell by Don W. Fawcett 1981 ; permission conveyed through Copyright Clearance Center, Inc.]
How would regions P–Q and R–S change when the muscle relaxes?
Markscheme
D
Examiners report
This question was answered correctly by only 33 % of the candidates. Incorrect responses were distributed fairly evenly among the options. The question discriminated well showing the better candidates were answering correctly.