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Q.

Select the correct statements.

(a) Actin filaments are thinner than the Myosin filaments.

(b) The thin filaments are firmly attached to the ‘Z’ line.

(c) 'I' band consists of both thick and thin filaments.

(d) M-line is in the centre of the 'I' band.

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a

(a) and (c)

b

(a) and (b)

c

(c) and (d)

d

(b) and (c)

answer is A.

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Detailed Solution

(a) Actin filaments are thinner than the Myosin filaments.

(b) The thin filaments are firmly attached to the ‘Z’ line.

(c) The I band only consists of thin filaments (actin) and does not contain thick filaments (myosin).

(d) The M-line is in the centre of the sarcomere and aligns with the thick filaments (myosin), not I band.

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