The single-unit membrane structure present in the cytoplasm in the form of a network is:

$A$: Materials synthesized in the endoplasmic reticulum are released through the cisternae of the Golgi apparatus via vesicles.
$R$: The Golgi apparatus is observed as oval and spherical vesicles towards the outer surface of the cisternae.

$S -$ Statement: The cisternae of the Golgi apparatus have a diameter of $5.0$ to $10 \, \mu m$.
$R -$ Reason: Each stack contains $2$ to $4$ tubules.

Read the given statements and select the correct option.
$I.$ In the Golgi complex,the cisternae have a $cis$ face and a $trans$ face.
$II.$ The $cis$ face and $trans$ face of the Golgi complex are called the forming face and maturing face,respectively.

The fine network of single unit membrane distributed extensively throughout the cytoplasm in a cell is referred to as

In steroid-producing cells,which of the following is true?