MCQs Biology F.Sc. Part 2 ( 2nd Year )
Chapter No.16
Support and Movements
Total MCQs = 165
71. The Weep and tricep muscles are found in:
(A) Shank
(B) Shoulder
(C) Upper arm
(D) Lower jaw
Answer:
(C) Upper arm
72. During muscular contraction: 046.410
(A) Actin slides past myosin
(B) ATP supplies energy
(C) Calcium ions Ca++ are involved
(D) All of these
Answer:
(D) All of these
73. A skeletal muscle cell:
(A) has light and dark bands
(B) has only one nucleus
(C) is under involuntary control
(D) None of the above are true
Answer:
(A) has light and dark bands
74. The proteins at the junction between sarcomeres form the:
(A) H zone
(B) M line
(C) Z line
(D) A band
Answer:
(C) Z line
75. Thick myofilaments are composed of several hundred molecules of a protein known as:
(A) Actin
(B) Myosin
(C) Troponin
(D) Tropomyosin
Answer:
(B) Myosin
76. Thin myofilaments are composed of two helically of a globular protein know as:
(A) Actin
(B) Mysin
(C) Troponin
(D) Tropomyocin
Answer:
(A) Actin
77. A disk-like protein which is centrally located in sarcomeres is:
(A) H line
(B) M line
(C) Z line
(I) I line
Answer:
(B) M line
78. Within a sarcomere how many thin filament are arrayed around each thick filament:
(A) 4
(B) 6
(C) 2
(D) 8
Answer:
(B) 6
79. Changes in sarcomere length are caused by the filaments being pulled along the thick filaments in the direction of the:
(A) H zone
(B) M line
(C) Z line
(D) I band
Answer:
(B) M line
80. Tetany characteristically is considered to be result of a sever degree of:
(A) Hyperglycemia
(B) Hypercalcaemia
(C) Hypocalcaemia
(D) Hypoglycemia
Answer:
(C) Hypocalcaemia
