The central part of the thick myofilaments, not overlapped by thin filaments, is called the:
1. Z line         
2. M line
3. I band       
4. H zone

Vertebrochondral ribs attach to the seventh rib with the help of:

1. Elastic cartilage

2. Hyaline cartilage

3. Fibrous cartilage

4. White fibrous tissue

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