STD 11 - 8. Cell the unit of life — BIOLOGY STD 11 Science — Question

$I.$ 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