Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Smooth muscles are non-striated, without alternate dark and light bands.
Reason (R) : Actin and myosin proteins are absent in smooth muscles.
In light of the above statements, choose the correct answer from the option given below.

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Both (A) and (R) are true and (R) is the correct explanation of (A).

Both (A) and (R) are true but (R) is not the correct explanation of (A).

(A) is true but (R) is false.

Both (A) and (R) are false.

answer is C.

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Detailed Solution

(A) is true but (R) is false.

Smooth muscles lack the highly organized sarcomere structure found in striated muscles, so they do not exhibit the striations or alternating dark and light bands seen in skeletal and cardiac muscles.

Actin and myosin proteins are present in smooth muscles and are essential for their function. However, the arrangement of these proteins is different from that in striated muscles. In smooth muscles, actin and myosin filaments are arranged more irregularly, which contributes to the lack of striations observed in these muscles.

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