DP Biology (first assessment 2025)

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Question EXEX.2.HL.TZ0.3b

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Date Example questions Example questions Marks available [Maximum mark: 3] Reference code EXEX.2.HL.TZ0.3b
Level HL Paper 2 Time zone TZ0
Command term Compare and contrast Question number b Adapted from N/A
b.
[Maximum mark: 3]
EXEX.2.HL.TZ0.3b
(b)

Cardiac muscle cells and striated muscle fibres are highly specialized to produce movement. Compare and contrast the structure of both types of muscle cells.

[3]

Markscheme
  1. both contain myofibrils
    OR
    both have light and dark bands/ are striated;

  2. cardiac muscle cells are branched whereas striated muscle cells unbranched
    OR
    cardiac muscle cells Y shaped whereas striated muscle cells are elongated
    OR
    cardiac muscle cells are connected to other cardiac muscle cells but skeletal muscle cells are not;

  3. cardiac muscle cells are shorter than striated muscle cells;

  4. cardiac muscle cells have one nucleus but striated muscle cells have many nuclei/ are multinucleated;

Syllabus sections