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3 questions · 2001 · answers as per the UPSC key

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UPSC 2001 · Q124 · Science & Technology › Biotechnology & Genetics · Save

Assertion (A): Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.

Reason (R): DNA fragments can be manipulated using restriction endonucleases and DNA ligases.

Which of the following is correct?

(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually 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: (a) Both A and R are individually true and R is the correct explanation of A
UPSC 2001 · Q129 · Science & Technology › Biotechnology & Genetics · Save

Which of the following features of DNA makes it uniquely suited to store and transmit genetic information from generation to generation?

(a) Complementarity of the two strands
(b) Double helix
(c) Number of base pairs per turn
(d) Sugar phosphate backbone
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Answer: (a) Complementarity of the two strands
UPSC 2001 · Q130 · Science & Technology › Biotechnology & Genetics · Save

The American multinational company, Monsanto has produced an insect-resistant cotton variety that is undergoing field-trials in India. A toxin gene from which ONE of the following bacteria has been transferred to this transgenic cotton?

(a) Bacillus subtilis
(b) Bacillus thuringiensis
(c) Bacillus amyloliquifanciens
(d) Bacillus globli
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Answer: (b) Bacillus thuringiensis