MCQ
Myelin sheath is formed by:
- ANissl's granules
- BMuscle cells
- CSchwann cells
- DAxon
Explanation:
The axon is covered by a lipid-rich membrane called myelin sheath. The myelin sheath is formed by Schwann cells and each Schwann cell covers a part of the axon. The region where axon is not covered by the myelin sheath called node of Ranvier.
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$I.$ Each myosin is a polymerized protein
$II.$ Many meromyosin constitutes one thick filament (myosin)
$III.$ Each meromyosin's tail is called heavy meromyosin $(HMM)$ and head is called light meromyosin $(LMM)$
$IV.$ The globular head is an active $ATP$ ase enzyme and has binding sites for $ATP$ and active sites for actin
Choose the option with correct statements