Nucleoid is present in:

Read the following statements regarding Mesosomes:
$I -$ They are in the form of vesicles,tubules,and lamellae.
$II -$ They are formed by the extensions of the cell wall.
$III -$ They help in increasing the enzymatic content.
$IV -$ They are associated with respiration and secretory processes.
Which of the following options is correct for Mesosomes?

Nucleoid is present in

The outermost,thick,and tough layer in bacteria is:

The extension of the plasma membrane in a prokaryotic cell is known as:

Statement $X$: Prokaryotic cells do not separate after division.
Statement $Y$: They are surrounded by a slimy substance secreted by the cell.