NEET Zoology Muscle Proteins MCQ Question
From given characters about structure of contractile proteins myosin which option contain only true characters?
(i) Each filament is made of two 'F' (filamentous) protein helically wound to each other.
(ii) Many monomeric proteins called meromyosins constitute one thick filament.
(iii) Two filaments of another protein, troponin also run close to the 'F' actins throughout its length.
(iv) Each meromyosin has two important parts, a globular head with a short arm called the heavy meromyosin (HMM) and a tail, called the light meromyosin (LMM).
(v) In the resting state a subunit of tropomyosin masks the active binding sites for myosin on the actin filaments.
(vi) Each 'F' protein is a polymer of monomeric 'G' (Globular) protein.
(vii) The globular head is an active ATPase enzyme and has binding sites for ATP and active sites for thin filament.
(i), (v) and (vi)
(ii), (iii), (iv), (v) and (vii)
(iii), (iv) and (vii)
(iv), (v) and (vi)
Correct Answer
Detailed Explanation
Statements (ii), (iii), (iv), (v), and (vii) correctly describe the structure and function of myosin. The other statements are incorrect as they describe actin or are incorrect descriptions of myosin.
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