NEET Previous Year Question
Which one of the following pairs of chemical substances is correctly categorized?
Topic: NEET PYQ
Answer: B. Full step-by-step solution below.
- APepsin and prolactin - Two digestive enzymes secreted in stomach
- BTroponin and myosin - Complex proteins in striated muscles
- CSecretin and rhodopsin - Polypeptide hormones
- DCalcitonin and thymosin - Thyroid hormones
Correct answer: B
Solution
(b) (a) Incorrect → Pepsin is a digestive enzyme, but prolactin is a hormone secreted by the pituitary gland.(b) Correct → Troponin and myosin are proteins involved in muscle contraction in striated muscles.
(c) Incorrect → Secretin is a peptide hormone, but rhodopsin is a visual pigment, not a hormone.
(d) Incorrect → Calcitonin is a thyroid hormone, but thymosin is secreted by the thymus gland, not the thyroid.
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