Water channels are possessed by a membrane to facilitate the movement of hydrophilic substances. These channels are made up of

The diagram given below represents a fluid mosaic model of the plasma membrane. Match the components marked as $A, B, C, D$ and $E$ in the diagram below from the list $(i)$ to $(vii)$.
$(i)$ Sugar $(ii)$ Protein $(iii)$ Lipid bilayer $(iv)$ Integral protein $(v)$ Cytoplasm $(vi)$ Cell wall $(vii)$ External protein

Assertion $(S)$: The plasma membrane and organelle membranes are composed of phospholipids.
Reason $(R)$: The structural component of cellular organelles is lipid.

$A$: The main structural component of the membranes of various cellular organelles is protein.
$R$: Protein is an important component of protoplasm.

Select the odd one out with respect to porins.

Select the incorrect option from the following regarding the cell membrane.