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Question
Basic unit of muscle contraction is :
Basic unit of muscle contraction is :
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Solution
The correct option is C Sarcomere
The distance between two Z–lines is called as Sarcomere. It is structural unit or functional unit of voluntary muscle fibre. It is the repeating unit between two Z lines.
Sarcomere = 1A band + two half I band
Myofibril are arranged in parallel row & form the dark & light line. These lines are found in alternate order. These lines are made up of actin & myosin protein. Each sarcomere is composed of two main protein filaments—actin and myosin—which are the active structures responsible for muscular contraction. Both proteins are filamentous proteins. Actin filaments are thin while myosin filaments are thick.
An actomyosin contractile ring is a prominent structure during cytokinesis. It forms perpendicular to the axis of the spindle apparatus towards the end of telophase, in which sister chromatids are identically separated at the opposite sides of the spindle forming nuclei.
The distance between two Z–lines is called as Sarcomere. It is structural unit or functional unit of voluntary muscle fibre. It is the repeating unit between two Z lines.
Sarcomere = 1A band + two half I band
Myofibril are arranged in parallel row & form the dark & light line. These lines are found in alternate order. These lines are made up of actin & myosin protein. Each sarcomere is composed of two main protein filaments—actin and myosin—which are the active structures responsible for muscular contraction. Both proteins are filamentous proteins. Actin filaments are thin while myosin filaments are thick.
An actomyosin contractile ring is a prominent structure during cytokinesis. It forms perpendicular to the axis of the spindle apparatus towards the end of telophase, in which sister chromatids are identically separated at the opposite sides of the spindle forming nuclei.
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