The globular head is/has

1. An active ATPase enzyme

2. Binding sites for ATP

3. active sites for actin

4. All of these

Sliding Filament Theory states that

1. Contraction of muscle fibre takes place by the sliding of thin filaments over the thick filaments

2. Contraction of muscle fibre takes place by the sliding of thick filament over thin Filaments

3. Relaxation of muscle fibre takes place by the sliding of thick filament over thin filaments

4. Relaxation of muscle fibre takes place by the sliding of thin filament over thick filament

The head part of the HMM of muscle fiber is

1. Globular

2. Triangular

3. Filamentous

4. Both 2 and 3

The motor unit actually has

1. Motor neuron

2. Motor neuron+ muscle fibres

3. Only muscle fibres

4. It can be both 2 and 3

Which of the following is a monomeric protein of thick filament?

1. Meromyosins

2. Macromyosins

3. Tropomyosin

4. Troponin

The LMM of muscle fiber is

1. Tail

2. Head

3. Short arm

4. Both 1 and 3

The HMM of muscle fiber has not got

1. Head

2. Short arm

3. Tail

4. Both 2 and 3

Each meromyosin has two

1. globular head with a short arm

2. Important part- HMM and LMM

3. Tails and one head

4. Short arms and one tail

Each Myosin filament is also a

1. Polymeric Protein

2. Monomeric Protein

3. Monomeric Glycoprotein

4. Polymeric Glycoprotein