A- Actin filaments occur in two forms: the mo | vedclass

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(D) Assertion $(A)$ is incorrect because $G$-actin (Globular actin) is the monomeric form,while $F$-actin (Filamentous actin) is the polymeric form. T

Vedclass · Accepted Answer

$A$ is incorrect and $R$ is correct.

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(D) Assertion $(A)$ is incorrect because $G$-actin (Globular actin) is the monomeric form,while $F$-actin (Filamentous actin) is the polymeric form. The statement incorrectly swapped these terms.Reason $(R)$ is correct. Tropomyosin is indeed a rod-shaped fibrous protein that forms two helical strands,which run along the length of the $F$-actin filaments to regulate muscle contraction.

Column-$I$	Column-$II$
$P$. Skeletal muscle	$I$. Biceps
$Q$. Smooth muscle	$II$. Iris
$R$. Cardiac muscle	$III$. Heart

$A-$ Actin filaments occur in two forms: the monomeric $G$-actin and the polymeric $F$-actin.
$R-$ Tropomyosin is a rod-shaped fibrous protein. Tropomyosin forms two helical strands,which are wrapped around the $F$-actin filaments.

Similar Questions

Where is myoglobin found?

Match the following columns:
Column-$I$ Column-$II$
$P$. Skeletal muscle $I$. Biceps
$Q$. Smooth muscle $II$. Iris
$R$. Cardiac muscle $III$. Heart

Which characteristic is $NOT$ associated with white muscle fibers?

Cross arms of the myosin monomer consist of:

Cardiac muscle fibers differ from skeletal muscle fibers in that they are -

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$A-$ Actin filaments occur in two forms: the monomeric $G$-actin and the polymeric $F$-actin.$R-$ Tropomyosin is a rod-shaped fibrous protein. Tropomyosin forms two helical strands,which are wrapped around the $F$-actin filaments.