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Locomotion and Movement
Muscle proteins
1 question from 1 paper, each with its answer.
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Concepts tested
- Contractile proteins
All Questions
2012 AIPMT-MAINS 1 question
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Which one of the following pairs of chemical substances is correctly categorised?Troponin is a complex protein present at regular intervals on the thin (actin) filament, and myosin is the polymerised protein forming the thick filament; both are proteins of striated muscle. This pair is correctly categorised.
Secretin is a peptide hormone of the gut, but rhodopsin is the visual pigment of the rods of the retina, not a hormone.
Calcitonin is secreted by the thyroid, but thymosin is secreted by the thymus.
Pepsin is a digestive enzyme of the stomach, but prolactin is a hormone of the anterior pituitary.
Hence the correctly categorised pair is troponin and myosin – complex proteins in striated muscles.