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Which of the following pairs correctly shows an enzyme and its function inside the human body?
A{'text': 'Pepsin — slows protein digestion'}
B{'text': 'Pepsin — speeds protein digestion'}
C{'text': 'Insulin — digests carbohydrates'}
D{'text': 'Adrenaline — digests fats'}
Answer & Solution
Correct answer: B. {'text': 'Pepsin — speeds protein digestion'}
1. Enzymes are biochemical catalysts that act in living tissues.
2. Pepsin is an enzyme in the stomach that **speeds up the breakdown of proteins**.
3. Insulin is a hormone (not a digestive enzyme); adrenaline is the emergency hormone.
4. Hence the pepsin–protein pair is correct.
_Source: Selina Concise ICSE Class 8 Chemistry Ch 6 "Chemical Reactions", Catalysts classification (biochemical)_
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