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Question No. 36Interactive Test Mode
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Q36. Consider the following statements in respect of probiotics: 1. Probiotics are made of both bacteria and yeast. 2. The organisms in probiotics are found in food we ingest but they do not naturally occur in our gut. 3. Probiotics help in the digestion of milk sugars. Which of the statements given above is/are correct?

Consider the following statements in respect of probiotics:

  1. Probiotics are made of both bacteria and yeast.
  2. The organisms in probiotics are found in food we ingest but they do not naturally occur in our gut.
  3. Probiotics help in the digestion of milk sugars. Which of the statements given above is/are correct?
Select the correct option below (or cross out options to eliminate)

Official Answer Key & Detailed Solution

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 2022 • Science and Technology

Correct Answer: Option (C) — 1 and 3

Concept & Option Breakdown

Standard Reference Verified

Statement 1 is correct: Probiotics comprise beneficial live microorganisms, which include bacteria (such as Lactobacillus and Bifidobacterium) as well as yeasts (such as Saccharomyces boulardii).

Statement 2 is incorrect: Probiotic strains are either identical or closely related to the normal microflora naturally residing in the human gastrointestinal tract.

Statement 3 is correct: Many probiotic bacteria express beta-galactosidase (lactase), which hydrolyzes milk sugar (lactose) into glucose and galactose, aiding lactose digestion.

Elimination Heuristic & Exam Approach

Absolute expressions such as 'do not naturally occur' are typical indicators of incorrect statements in biology questions. Since probiotics naturally support gut health, it is intuitive that similar organisms already constitute the indigenous gut microbiome.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2022 (Q36)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (C) — 1 and 3

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Frequently Asked Questions — UPSC Prelims 2022 Q36

What is the official answer for UPSC Prelims 2022 GS Paper I Question 36 (Science and Technology)?

The official UPSC answer key for this 2022 Science and Technology (Health & Medicine) question is Option (C): "1 and 3". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2022 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?

Absolute expressions such as 'do not naturally occur' are typical indicators of incorrect statements in biology questions. Since probiotics naturally support gut health, it is intuitive that similar organisms already constitute the indigenous gut microbiome.

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