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


Question 1:
What are free radicals?

Answer:
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.

Answer:
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.

Answer:
Internal factors: metabolism/ inflammation

External factors: sunlight/ factory smoke/ cigarette smoke

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