Myosin head cleaves ATP for:

1. Formation of cross bridges

2. Breaking of cross bridges

3. Both 1 and 2

4. Neither 1 nor 2

Vitamin D deficiency in an adult causes the condition known as _____.

1.rickets

2. osteoporosis

3. osteomalacia

4. giantism

The number of correct statements amongst the given statements is:

1.  2       

2.  3

3.  4       

4.  5

In the given diagram of the human skull, the bones represented by the letters A, B, and C are respectively:

1. Sphenoid, Ethmoid and Lacrimal

2. Ethmoid, Sphenoid and Lacrimal

3. Sphenoid, Lacrimal and Ethmoid

4. Ethmoid, Lacrimal and Sphenoid

Match each item in Column I with one in Column II and choose your answer from the codes given below:
       Type of joint            Example
       A. Hinge            a. First carpo-metacarpal
       B. Pivot              b. Between the carpals
       C. Gliding           c. Atlanto-axial
       D. Saddle           d. Knee joint

            A.    B.    C.     D.
   

1.     d     c      b      a
   

2.     c     d      b      a
   

3.     c     b      d      a
   

4.     d     b      a      c

During skeletal muscle contraction, increase in calcium levels leads to binding of calcium to a subunit of _______ on ______ filaments and thereby removes the masking of active sites for ______.

1. Troponin, Tropomysin, Myosin

2. Calmodulin, Actin, Myosin

3. Troponin, Actin, Myosin

4. Calmodulin, Actin, Myosin

Cardiac muscles can be best defined as:

Which of the following is required for the breaking of cross-bridge during muscle contraction?

1. ATP and Ca⁺⁺

2.  ADP and Ca⁺⁺

3.  Only Ca⁺⁺

4.  ATP only

Zygomatic and sphenoid bone is an example of

1.  Cranial bones.

2.  Cranial bone and facial bone respectively.

3.  Facial bone and cranial bone respectively.

4.  Facial bone.

The calcium binding protein in smooth muscles leading to contraction is:

1.  Calmodulin

2.  Troponin

3.  Tropomyosin

4.  Ubiquitin