Which of the following statements are true about myosin? I. Myosin is made of meromyosin. II. Each meromyosin has two parts - HMM and LMM III. The tail is the light meromyosin i.e. LMM IV. The head with short arm is heavy meromyosin i.e. HMM
A
III
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B
I and II
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C
I, II, III and IV
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D
IV
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Solution
The correct option is C I, II, III and IV The myosin molecule is made up of meromyosin. Each meromyosin has two parts, i. a globular head with a short arm, known as the heavy meromyosin (HMM) ii. a tail or the light meromyosin (LMM).