The contractile protein of skeletal muscle involving ATPase activity is:
1. tropomyosin
2. myosin
3. α-actinin
4. troponin

If a stimulus, several times greater than the threshold stimulus, is provided to a muscle fiber, it will
1. Contract with a larger force
2. Contract with a smaller force
3. Contract with the same force
4. Undergo tetany

Which one of the following is a sesamoid bone?
1. Pelvis
2. Patella
3. Pterygoid
4. Pectoral girdle

Given diagram shows bone of the left human hind limb as seen from front. It has certain mistakes in labeling. Two of the wrongly labelled bones are
    

Consider the following statements:
I. A motor neuron along with the muscle fibres connected to it constitute a motorunit.
II. The neurotransmitter released at the neuro-muscular junction is Acetylcholine.
III. Myosin head has ATPase activity.
Which of the above statements are true?
1. I and II only           2. I and III only
3. II and III only        4. I, II, and III

Consider the following statements:

Which of the above statements are true?
1. I and II only         
2. I and III only
3. II and III only     
4. I, II, and III

Consider the following statements:
I. Proximal radioulnar joint is a type of ellipsoidal joint.
II. The first carpo-metacarpal joint is a saddle joint.
III. Gleno-humeral joint is a ball and socket joint.
Which of the above statements are true?
1. I and II only        2. I and III only
3. II and III only      4. I, II, and III

In the given diagram of the lower limb bones of a human, a sesamoid bone is depicted by the letter:
   
1. A
2. B
3. C
4. D

In the molecule shown in the given diagram, ATPase activity is present in:
   
1. A
2. B
3. C
4. D

The globular head of the myosin filament has active site/s for binding to:
I. ATP
II. Active site on actin filament
III. Calcium