Study the following statements about myosin monomers

1) Many meromyosins constitute one thick filament

2) The globular head is an active ATPase enzyme

3) The tail part is called heavy meromyosin

4) The head and short arm projects outwards at regular distance is known as cross arm

In the above how many statements are true?

The tail of myosin is made of light meromyosin (LMM).

Each myosin (thick) filament is also a polymerised protein. Many monomeric proteins called Meromyosins constitute one thick filament. Each meromyosin has two important parts, a globular head with a short arm and a tail, the former being called the heavy meromyosin (HMM) and the latter, the light meromyosin (LMM).The HMM component, i.e.; the head and short arm projects outwards at regular distance and angle from each other from the surface of a polymerised myosin filament and is known as cross arm.