UPSC Prelims 2001 · General Studies
Question 125: Science and Technology
The cellular and molecular control of programmed cell death is known as
AnswerThe answer is (a).
Apoptosis is genetically controlled programmed cell death, in which a cell shrinks, its DNA is cut up and it is cleared away without causing inflammation. Necrosis, by contrast, is accidental cell death from injury and does cause inflammation. Ageing is the gradual decline of the whole body, and degeneration is the deterioration of tissue. Remember that apoptosis is planned and necrosis is not.
Why each option is right or wrong
- (a) Right: apoptosis.
- (b) Ageing is the gradual decline of the body.
- (c) Degeneration is the deterioration of tissue, not a controlled process.
- (d) Necrosis is accidental death, not controlled.
Explanation: written by UPSC Grade, not by UPSC.
Source: UPSC, Civil Services (Preliminary) Examination 2001, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.