Robert Hooke discovered the . . . . . . of a cell.

$A$ protoplast is a cell that is:

Assertion $A$: The middle lamella is present between the primary walls of two adjacent plant cells.
Reason $R$: Two adjacent cells maintain cytoplasmic contact through plasmodesmata.
Which option is correct for Assertion $A$ and Reason $R$?

This is absent in protoplast.

Which of the following is a structural component of the plant cell wall?

How many micelles combine to form a microfibril?