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3 questions · 2000 · answers as per the UPSC key

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UPSC 2000 · Q116 · Science & Technology › Biology · Save

At which stage in its life-cycle does the silkworm yield the fibre of commerce?

(a) Egg
(b) Larva
(c) Pupa
(d) Imago
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Answer: (c) Pupa
UPSC 2000 · Q120 · Science & Technology › Biology · Save

Match List I (Endocrine glands) with List II (Hormones secreted) and select the correct answer using the codes given below the Lists:

List I I. Gonads II. Pituitary III. Pancreas IV. Adrenal

List II A) Insulin B) Progesterone C) Growth hormones D) Cortisone

Codes:

(a) I-C, II-B, III-D, IV-A
(b) I-B, II-C, III-D, IV-A
(c) I-B, II-C, III-A, IV-D
(d) I-C, II-B, III-A, IV-D
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Answer: (c) I-B, II-C, III-A, IV-D
UPSC 2000 · Q123 · Science & Technology › Biology · Save

The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by

(a) a decrease in the supply of oxygen
(b) minor wear and tear of muscle fibres
(c) the depletion of glucose
(d) the accumulation of lactic acid
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Answer: (d) the accumulation of lactic acid