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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.
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Topics: Locomotion and Movement
(106)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The ship in which Charles Darwin travelled was
- Dinosaurs dominated the world in which of the following geological era?
- Which of the following layers in anantral follicle is acellular?
- The two sub-units of ribosome remain united a critical ion level of
- Which one of the following types of organisms occupy more than one trophic
Topics: Locomotion and Movement (106)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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