Acme Ai
A
अ
GS Paper IUPSC Prelims 2007
Health & Medicine
Question No. 428Interactive Test Mode
00:00
+2-0.66

Q428. Which one of the following is not a digestive enzyme in the human system?

Which one of the following is not a digestive enzyme in the human system?

Select the correct option below (or cross out options to eliminate)
PrevNext Question

Official Answer Key & Detailed Solution

3D PYQ Realm

Ready to check the official UPSC Answer Key?

Click any option above to test yourself under exam conditions, or reveal the explanation directly.

Official UPSC Answer KeyUPSC Prelims 2007 • Science and Technology

Correct Answer: Option (B) — Gastrin

Concept & Option Breakdown

Standard Reference Verified
  • Gastrin is a peptide hormone, NOT an enzyme. It is secreted by G-cells in the gastric antrum and duodenum, functioning to stimulate the secretion of gastric acid (HCl) by parietal cells.
  • Trypsin is a proteolytic digestive enzyme produced as trypsinogen by the pancreas.
  • Ptyalin (salivary alpha-amylase) is a carbohydrate-digesting enzyme secreted by salivary glands.
  • Pepsin is a proteolytic enzyme secreted as pepsinogen by chief cells of the stomach.
Elimination Heuristic & Exam Approach

Gastrin, secretin, and cholecystokinin (CCK) are digestive hormones, whereas trypsin, pepsin, and ptyalin are digestive enzymes.

Reviewed by Avinash Sir & Acme AI Research Team

Practice Full-Length & Sectional Prelims Mocks on this Interface

50 simulated tests in the APT Prelims Test Series (₹1,493) or 1-on-1 Mentorship with Avinash Sir.

1-on-1 MentorshipOpen Test Platform

Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2007 (Q428)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (B) — Gastrin

More PYQs from Science and Technology (Health & Medicine)

Master the Science and Technology syllabus cluster by practicing these related previous year questions.

View All Science and Technology PYQs
2022 • Q406Health & Medicine

Certain species of which one of the following organisms are well known as cultivators of fungi?

Science and TechnologyPractice
2010 • Q407Health & Medicine

Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria. Why is it

Science and TechnologyPractice
2010 • Q408Health & Medicine

Consider the following statements: 1. Hepatitis B is several times more infectious than HIV / AIDS 2. Hepatitis B can cause liver cancer Which of the

Science and TechnologyPractice
2009 • Q409Health & Medicine

In the context of genetic disorders, consider the following: A woman suffers from colour blindness while her husband does not suffer from it. They hav

Science and TechnologyPractice
2009 • Q410Health & Medicine

In the context of Indian wild life, the flying fox is a

Science and TechnologyPractice
2009 • Q411Health & Medicine

With reference to the evolution of living organisms, which one of the following sequences is correct?

Science and TechnologyPractice
2009 • Q412Health & Medicine

The Panda belongs to the same family as that of

Science and TechnologyPractice
2009 • Q413Health & Medicine

The marine animal called Dugong which is vulnerable to extinction is

Science and TechnologyPractice

Frequently Asked Questions — UPSC Prelims 2007 Q428

What is the official answer for UPSC Prelims 2007 GS Paper I Question 428 (Science and Technology)?

The official UPSC answer key for this 2007 Science and Technology (Health & Medicine) question is Option (B): "Gastrin". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2007 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?

Gastrin, secretin, and cholecystokinin (CCK) are digestive hormones, whereas trypsin, pepsin, and ptyalin are digestive enzymes.

Beyond Previous Year Questions

Structured Prelims Practice & Mentorship

Pair previous year question analysis with full-length simulated mock tests and 1-on-1 faculty guidance.

APT 2027 • 50 Prelims Tests17% OFF

Acme Prelims Test Series (APT)

Built to eliminate 1/3rd negative marking losses and 50–50 option traps through structured simulation and NCERT-backed keys.

  • 50 High-Yield Tests: Subject Sectionals, Current Affairs, CSAT Paper II & Full-Length Simulators
  • 1/3rd Penalty & Trap Analytics: Identify whether marks are lost to over-attempting or conceptual gaps
  • Option-by-Option NCERT Keys: Detailed distractor analysis and elimination logic for every question
  • Custom PDF-to-Mock Generator: Convert your revision notes or current affairs PDFs into practice tests
Complete 50-Test Package
₹1,493₹1,799• Valid till Prelims 2027
Explore APT Test SeriesTry Free Mock
1-on-1 Personal MentorshipCapped at 10 Seats

1-on-1 UPSC Mentorship with Avinash Sir

Weekly 1-on-1 strategy reviews, daily study accountability, and personalized MCQ attempt audits with an experienced UPSC mentor.

  • Weekly 1-on-1 Sessions: Direct mentorship with Avinash Sir (Former Plutus IAS Mentor, UPSC & UPPCS Mains Written)
  • APT 50-Test Series Included: Full Prelims GS1 & CSAT test series bundled at no additional cost
  • Mock Attempt & Elimination Audit: Question-by-question review to calibrate your risk and attempt accuracy
  • Prelims & Integrated Tracks: Available as dedicated Prelims mentorship or end-to-end Prelims + Mains guidance
Prelims & Integrated Tracks
17% OFF• Includes APT 50-Test Series
Explore 1-on-1 MentorshipCompare Tracks
Previous QuestionProduction of which one of the following is a function of the liver?
Next QuestionWhich one of the following is the correct sequence in the order of decreasing length of the three structural parts given below of small intestine in the human body?