Topic Digestion
Asked 8 times across 4 UPSC exams over 41 years (1985–2026), peaking in 2022.
Key insights
- Most tested in CSE — 3 of 8 PYQs
- Most asked in 2022
- Recurs across 7 years (1985–2026)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1985 → CAPF 2018 → CDS 2022 → NDA 2022
How the concept evolved
Rising — more than half its appearances (5 of 8) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CDS2026
Nearly all infants benefit from milk, but most adults cannot properly digest milk. If an elderly person can still digest milk, his body is producing enough of which enzyme ?
- A Cellulase
- B Amylase
- C Pectase
- D Lactase ✓
✓ Correct answer: (D)
Science & Technology › Biology & Health
CDS2023
Which one of the following statements regarding bile secreted by liver is not correct?
- A Bile contains enzymes for digestion of lipids. ✓
- B Bile facilitates emulsification of fats.
- C Bile neutralizes the acidic pH of the food coming from stomach.
- D Bile makes the pH of the food alkaline and facilitates action of pancreatic enzymes.
✓ Correct answer: (A)
Science & Technology › Biology & Health
CDS2022
Which of the following mineral acids is found in human stomach ?
- A Hydrochloric acid ✓
- B Lactic acid
- C Uric acid
- D Methanoic acid
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
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