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GS Paper IUPSC Prelims 2001
Health & Medicine
Question No. 473Interactive Test Mode
00:00
+2-0.66

Q473. Match List-I with List-II and select the correct answer using the codes given below: | List-I (Substance) | List-II (Physiological role) | | :--- | :--- | | A. Ptyalin | 1. Converts angiotensinogen in blood into angiotensin | | B. Pepsin | 2. Digests starch | | C. Renin | 3. Digests proteins | | D. Oxytocin | 4. Hydrolyses fats | | | 5. Induces contraction of smooth muscles | Codes:

Match List-I with List-II and select the correct answer using the codes given below:

List-I (Substance)List-II (Physiological role)
A. Ptyalin1. Converts angiotensinogen in blood into angiotensin
B. Pepsin2. Digests starch
C. Renin3. Digests proteins
D. Oxytocin4. Hydrolyses fats
5. Induces contraction of smooth muscles

Codes:

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2001 • Science and Technology

Correct Answer: Option (A) — A – 2; B – 3; C – 1; D – 5

Concept & Option Breakdown

Standard Reference Verified

• A is matched with 2: Ptyalin (salivary amylase) digests starch into maltose. • B is matched with 3: Pepsin is a gastric protease that breaks down dietary proteins into smaller peptides. • C is matched with 1: Renin (released by kidney juxtaglomerular cells) converts angiotensinogen to angiotensin I. • D is matched with 5: Oxytocin stimulates the contraction of uterine smooth muscles during labor and mammary myoepithelial cells for milk ejection.

Elimination Heuristic & Exam Approach

Ptyalin is salivary amylase (starch digestion -> A-2) and Oxytocin triggers smooth muscle contractions (D-5). This confirms (a) immediately.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2001 (Q473)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (A) — A – 2; B – 3; C – 1; D – 5

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Frequently Asked Questions — UPSC Prelims 2001 Q473

What is the official answer for UPSC Prelims 2001 GS Paper I Question 473 (Science and Technology)?

The official UPSC answer key for this 2001 Science and Technology (Health & Medicine) question is Option (A): "A – 2; B – 3; C – 1; D – 5". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2001 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Health & Medicine UPSC Prelims question using option elimination?

Ptyalin is salivary amylase (starch digestion > A2) and Oxytocin triggers smooth muscle contractions (D5). This confirms (a) immediately.

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