UPSC Prelims 2001 · General Studies
Question 138: Science and Technology
Match List I with List II and select the correct answer using the codes given below the Lists: List I (Substance) I. Ptyalin II. Pepsin III. Renin IV. Oxytocin List II (Physiological role) A) Converts angiotensinogen in blood into angiotensin B) Digests starch C) Digests proteins D) Hydrolyses fats E) Induces contraction of smooth muscles
AnswerThe answer is (a).
Ptyalin, the salivary amylase, digests starch. Pepsin, from the stomach, digests proteins. Renin, an enzyme from the kidney, converts angiotensinogen in the blood into angiotensin, which raises blood pressure. Oxytocin, a pituitary hormone, induces contraction of smooth muscles of the uterus during childbirth and of the milk glands during lactation.
- I. Ptyalin digests starch.
- II. Pepsin digests proteins.
- III. Renin converts angiotensinogen into angiotensin.
- IV. Oxytocin induces contraction of smooth muscles.
Why each option is right or wrong
- (a) Right: starch, proteins, angiotensin, smooth muscle.
- (b) The first three matches are wrong.
- (c) The first two are right, but Renin and Oxytocin are swapped.
- (d) All four matches are wrong.
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.