Science & Technology › Biotechnology & Genetics – UPSC Prelims PYQs

57 questions · 1996–2026 · answers as per the UPSC key · page 2 of 2

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Assertion (A): Dolly was the first cloned mammal.

Reason (R): Dolly was produced by in-vitro fertilization.

(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
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Answer: (c) A is true, but R is false

Haemophilia is a genetic disorder which leads to

(a) decrease in haemoglobin level
(b) rheumatic heart disease
(c) decrease in WBC
(d) non-clotting of blood
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Answer: (d) non-clotting of blood

Which one of the following types of micro-organisms is most widely used in industries?

(a) Bacteria
(b) Bacteria and fungi
(c) Bacteria and algae
(d) Bacteria, micro-algae and fungi
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Answer: (d) Bacteria, micro-algae and fungi

Which one of the following techniques can be used to establish the paternity of a child?

(a) Protein analysis
(b) Chromosome counting
(c) Quantitative analysis of DNA
(d) DNA finger-printing
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Answer: (d) DNA finger-printing

The sequencing of the entire genome (the totality of all genes) of an organism was completed in 1996. The organism was

(a) albino mouse
(b) yeast
(c) human being
(d) Plasmodium vivax
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Answer: (b) yeast

Which of the following professional(s) are more likely to run the risk of a permanent change in their cell’s DNA? I. Researchers using carbon-14 isotope II. X-ray technician III. Coal miner IV. Dyer and painter

Select the correct answer using the codes given below:

(a) II alone
(b) I, II and III
(c) I, II and IV
(d) I, III and IV
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Answer: (c) I, II and IV

It is possible to produce seedless tomato fruits by

(a) applying trace elements in tomato fields
(b) spraying mineral solution on plants
(c) spraying hormones on flowers
(d) applying fertilisers containing radioactive elements
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Answer: (c) spraying hormones on flowers