Formative Practice 10.2 – Form 4 Science (KSSM) Chapter 10

Question 1:
What are free radicals?

Free radicals are atoms or molecules that lack one electron. Thus, making the atoms or molecules unstable, reactive and tend to attack other atoms or other molecules.

Question 2:
Explain how free radicals are formed.

Free radicals are formed from the oxidation process that happens in the body due to internal and external factors.

Question 3:
Give two reasons why there are free radicals in the body.

Internal factors: metabolism/ inflammation

External factors: sunlight/ factory smoke/ cigarette smoke

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