Skeletal muscle is composed of the repeating structures of .............. and ............... fibers.
A
Albumin and calcium
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B
Insulin and albumin
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C
Humulin and casein
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D
Actin and myosin
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Solution
The correct option is C Actin and myosin Skeletal muscles consist of repeating structures of actin and myosin fibers. They form the thin and thick filaments respectively whose alternative arrangement within the myofibrils give these muscles a striated appearance.