Zoology-Muscle Contraction
NEET Zoology Muscle Contraction MCQ Question
Type: MCQ-conceptual-Hard-Class 11
Which combination of statements about muscle contraction is correct?
A
Actin is a thin filament, the Z line bisects the I band, and myosin is a thick filament.
B
Myosin is a thin filament, the A band contains only actin, and the Z line is part of the H zone.
C
Both actin and myosin are found in the I band, and the Z line is not associated with thin filaments.
D
The A band is only composed of thick filaments, the I band is wider than the A band, and actin is a thick filament.
Correct Answer
Option A
Detailed Explanation
Actin is indeed present in thin filaments, the Z line bisects the I band, and myosin is classified as a thick filament, supporting the correct understanding of muscle structure and contraction.
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