UPSC CSE Prelims
Question 10
Regular intake of fresh fruits and vegetables is recommended in the diet since they are a good source of antioxidants. How do antioxidants help a person maintain health and promote longevity ?
View correct answer and explanation
Correct answer: C
Correct Option: C
Explanation: Antioxidants help limit oxidative damage by scavenging or neutralising reactive free radicals generated in metabolism and by external exposures.
Option-wise Analysis:
A: Incorrect - Their central function is not activating enzymes to synthesise vitamins.
B: Incorrect - They do not primarily conserve energy by stopping normal oxidation of nutrients.
C: Correct - neutralisation of reactive radicals protects lipids, proteins and DNA.
D: Incorrect - Delaying ageing via direct gene activation is not a general established mechanism.