1995 General Studies, all questions

UPSC Prelims 1995 · General Studies

Question 126: Science and Technology

Which one of the following hormones contains iodine?

aThyroxine
bTestosterone
cInsulin
dAdrenaline

AnswerThe answer is (a).

Thyroxine is the hormone of the thyroid gland, built from the amino acid tyrosine and iodine, which is why iodine deficiency causes goitre. Testosterone is a steroid, insulin is a protein, and adrenaline is derived from tyrosine without iodine. Remember: thyroxine contains iodine.

Why each option is right or wrong
  • (a) Right: thyroxine.
  • (b) Testosterone is a steroid hormone with no iodine.
  • (c) Insulin is a protein hormone without iodine.
  • (d) Adrenaline contains no iodine.

Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 1995, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.