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Question 18N.3.hl.TZ0.12d.ii

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.3.hl.TZ0.12d.ii
Level hl Paper 3 Time zone TZ0
Command term Explain Question number d.ii Adapted from N/A
d.ii.
[Maximum mark: 2]
18N.3.hl.TZ0.12d.ii

The Sun’s energy is produced by the fusion of hydrogen nuclei.

Nuclear energy produces ionizing radiation which leads to the formation of free radicals.

(d.ii)

Explain why free radicals are harmful to living cells.

[2]

Markscheme

highly reactive

OR

start redox reactions ✔

 

damage/mutate DNA

OR

cause cancer

OR

damage enzymes ✔

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