How many micelles combine to form a microfibril?

What is the middle lamella in a plant cell composed of?

The strength and rigidity of a cell wall is due to the substance known as:

Which of the following is $NOT$ a function of the cell wall?
$(I)$ Provides shape to the cell.
$(II)$ Protects the cell from mechanical damage and infection.
$(III)$ Helps in cell-to-cell interaction.
$(IV)$ Provides a barrier to undesirable macromolecules.
$(V)$ Endosmosis of water.

The cell wall is a ...... membrane.

Which structure connects the cytoplasm of two adjacent cells?