NEET MCQ on Sliding Filament Theory Quiz Questions

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Home › Quiz › NEET MCQ on Sliding Filament Theory

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1. Which of the following ions is responsible for unmasking of active binding sites on actin for forming cross-bridge during muscle contraction?

A Potassium B Magnesium C Sodium D Calcium

2. Sliding theory states that

A actin and myosin filaments shorten and slide past each other B when myofilaments slide past each other, shortening of actin filaments occur C when myofilaments slide past each other, shortening of myosin filaments occur D actin and myosin filaments do not shorten, they only slide past each other

3. Which of the following is correct for muscle contraction?

A Shortening of actin filaments B Shortening of A, H and I bands C No change in A bands D Sarcomere do not shorten

4. Which of the following shows ATPase activity during muscle contraction?

A Actin B Tropomyosin C Troponin D Myosin

5. Which of the following is correct for muscle contraction?

A Distance between two Z line increases B Length of I band increases C Length of A band remains constant D Length of H zone increases

6. Sarcomere is

A the part between two Z-lines B the part between two I-bands C the part between two A-lines D the part between two H-lines

7. This is a contractile protein of muscles

A Myosin B Tubulin C Tropomyosin D All of the above

8. Which of the following is a functional unit of striated muscles?

A Myofibril B Cross-bridges C Z-band D Sarcomere

9. When actin filaments are dragged towards M-line, it is known as

A recovery stroke B refractory stroke C power stroke D none of the above

10. Accumulation of __________ causes muscle fatigue

A lactic acid B myosin ATPase C carbon dioxide D none of the above

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