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Structural and functional unit of contractile apparatus in striated muscle is called
Options
(a) cross bridge
(b) myofibril
(c) Z-band
(d) sarcomere
Correct Answer:
sarcomere
Explanation:
Sarcomere is the functional unit of myofibril. It is the part of myofibril between two successive Z-lines, which consists of two I-band halves, and an A-band between them. The region contains a bundle of two types of protein filaments, actin and myosin. Upon contraction, the actin filaments slide towards the centre of the myosin filaments, and overall sarcomere length get smaller.
Related Questions: - How many meiotic divisions are required to produce 100 pollen grains
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Topics: Locomotion and Movement
(106)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- How many meiotic divisions are required to produce 100 pollen grains
- Which one of the following is wrongly matched?
- Gametes are never hybrid. This is a statement of
- The mature seeds of plants such as gram and peas posses no endosperm because
- During stress condition which of the following starts working
Topics: Locomotion and Movement (106)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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