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NEET UG BIOLOGY MCQ: LOCOMOTION AND MOVEMENT
1
Medium
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Understanding
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Which of the following statement Is/ are correct / incorrect?
I. A-bands of the muscle is dark and contain myosin.
II. I-bands are the light bands and contain actin
III. During muscle contraction, the A-band contracts.
IV. The part between the two Z-lines is called as sarcomere.
V. The central part of thin filament, not overlapped by thick filament is called H-zone.
I. A-bands of the muscle is dark and contain myosin.
II. I-bands are the light bands and contain actin
III. During muscle contraction, the A-band contracts.
IV. The part between the two Z-lines is called as sarcomere.
V. The central part of thin filament, not overlapped by thick filament is called H-zone.
View answer and explanation
Correct option: C
I and II are correct, while III, IV and V are incorrect
Option C (I and II are correct, while III, IV and V are incorrect) is correct because A-bands do not contract, the part between two Z-lines is a sarcomere, and the H-zone is the central part of the A band.
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Identify A, B and C, so as to complete the given statements Which is not the function of endoskeleton? Read the following statements about human skeleton system and choose the option that correctly states them true (T) and false (F).
a. Total number of bones in hind limbs are 60
b. There are 26 bones in vertebral column of an adult man
c. There are 2 pairs of vertebrochondral ribs
d. Axial skeleton is comprised of 80 bones
Assertion : Muscle contraction force increases
with rise in strength of stimulus.
Reason : This is due to increased contraction of
individual muscle fibres with increase in stimulus
strength.
Identify A, B and C, so as to complete the given statements Which is not the function of endoskeleton? Read the following statements about human skeleton system and choose the option that correctly states them true (T) and false (F).
a. Total number of bones in hind limbs are 60
b. There are 26 bones in vertebral column of an adult man
c. There are 2 pairs of vertebrochondral ribs
d. Axial skeleton is comprised of 80 bones
Assertion : Muscle contraction force increases
with rise in strength of stimulus.
Reason : This is due to increased contraction of
individual muscle fibres with increase in stimulus
strength.