The striated appearance of a myofibril is due to the distribution pattern of:

Correct option is C

Correct Answer: (c)
Explanation:
The striated (banded) appearance of skeletal muscle fibers arises due to the arrangement of actin (thin) and myosin (thick) filaments in alternating light and dark bands.
Information Booster:
Myofibrils show A-bands (dark) formed by both actin and myosin overlap and I-bands (light) with only actin.
The sarcomere is the structural and functional unit of contraction, extending from Z-line to Z-line.
Actin forms the thin filament; myosin forms the thick filament.
The striated pattern disappears when the muscle contracts due to sliding filament movement.
Troponin and tropomyosin regulate muscle contraction but do not cause banding.
Additional Information:
(a) Meromyosin is a subunit of myosin, not responsible for banding.
(b) Sarcoplasmic reticulum stores calcium ions, unrelated to striations.
(d) Troponin is a regulatory protein complex on actin filaments.