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IB Biology SL 1.3.4 Causes of mutation Question Bank

Practise IB Biology SL 1.3.4 by identifying mutagens and explaining how environmental factors can increase mutation rate.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Identify a physical or chemical environmental factor that can increase mutation rate.
  • Explain how UV, smoke or another mutagen can damage DNA or alter replication.
  • Use a case example to distinguish a mutagenic exposure from a proven disease cause.

D1.3.4—Causes of mutation question 1

[Maximum number: 1]

The Cancer Council of New South Wales has stated that one in five cancer deaths are caused by smoking. How can smoking cause cancer?

A

20 % of smokers get cancer.

B

Cigarette smoke contains mutagenic chemicals.

C

Smoking reduces the rate of mitosis in cells.

D

Smoking is addictive.

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