Myosin Molecule

Q. Match the following:
$\begin{array}{cc}\text{i. Heavy Meromyosin}& \text{1. Globular head with short arm}\\ \text{ii. Light Meromyosin}& \text{2. Filamentous actin}\\ \text{iii. F actin}& \text{3. Globular actin}\\ \text{iv. G actin}& \text{4. Tail}\end{array}$

1. i-2, ii-3, iii-4, iv-1
2. i-4, ii-1, iii-3, iv-2
3. i-1, ii-4, iii-2, iv-3
4. i-2, ii-1, iii-4, iv-3

Q. The thick filament is made up of monomeric proteins called ______i_______ which has 2 parts, a globular head with short arm and a tail, the former is referred to as ______ii________ while the latter is referred to as ______iii________.

1. i- meromysosin, ii- heavy meromyosisn, iii- light meromyosisn
2. i- tropomyosin, ii- light meromyosisn, iii- heavy meromyosisn
3. i- tropomysosin, ii- heavy meromyosisn, iii- light meromyosisn
4. i- meromysosin, ii- light meromyosisn, iii- heavy meromyosisn

Q. Which of the following is a component of the contractile protein called myosin?

1. Troponin
2. Meromyosin
3. Tropomyosin
4. Both a and c

Q. The contractile protein of skeletal muscle involving ATPase activity is

1. Troponin
2. Myosin
3. Tropomyosin
4. Alpha - actinin

Q.

Label the part of myosin structure

​

1. 1. Myosin heads 2. Tail 3. Actin binding sites 4. ATP binding sites

2. 1. ATP binding sites 2. Tail 3. Myosin heads 4. Actin binding sites

3. 1. Actin binding sites 2. Tail 3. ATP binding sites 4. Myosin heads

4. 1. Myosin heads 2. Tail 3. ATP binding sites 4. Actin binding sites