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Contraction

A sarcomere c...

Question

A sarcomere consists of

A

One A-band and one I-band

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B

Half A-band and two half I-band

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C

Half A-band and one I-band

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D

One A-band and two half I-band

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Solution

The correct option is A One A-band and one I-band
Sarcomeres are composed of long, fibrous proteins as filaments that slide past each other when a muscle contract or relaxes. Two of the important proteins are myosin, which forms the thick filament, and actin, which forms the thin filament.
So, the correct option is 'One A band and one I band'.

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Similar questions

Q. During muscle contraction, which of the following shortens?
(i) A band
(ii) I band
(iii) Sarcomere

Q. Differentiate between A-band and I-band.

Q. Assess the statements.
1. A-bands of the muscle is dark and contain myosin.
2. I-bands are the light bands and contain actin.
3. During muscle contraction the A-band contracts.
4. The part between the two Z-lines is called as sarcomere.
5. The central part of thick filament, not overlapped by thin filament, called H-zone.
Of the above statements.

Q. During skeletal muscle contractions following events can occur:
I. I-band shortens
II. A-band shortens
III. H-zone shortens
IV. Sarcomere contract
V. ATP changes to ADP and Pi
Choose the option with incorrect events.

Q. Very short answer type.
Name the protein found in A-band and I-band of a myofibril.

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