Question

During contraction of muscles

• A. actin filament slide
• B. actin filament slide over myosin
• C. myosin filament slide over actin
• D. myosin filament slide over myosin.

Answer 1

The correct option is B

actin filament slide over myosin

The correct answer is option B

The explanation of the correct option:

1. The contraction of muscle follows the sliding filament theory.
2. In this process the thin actin filament slide over the thick myosin filament.
3. The enzymatic action occurs during muscle contraction.
4. The sarcomere gets shortened due to the cross-bridges between the actin and myosin filament.
5. The Z-lines get closer and lead to the shortening of the muscle.
6. The ADP is produced in these cross bridges as ATP is utilized.

Final answer: During contraction of muscles actin filament slide over myosin.