Where are some proteins arranged in the cell to facilitate the transport of substances?

In the human erythrocyte membrane,the percentage of protein $P$ and lipid $Q$ is respectively:

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

Which of the following is described as a quasi-fluid and functionally dynamic membrane?

How does a gap junction facilitate intercellular communication?

Select the correct statements regarding cell membrane in eukaryotic cell.
$A$. Membrane of human $RBCs$ has approximately $52\%$ protein.
$B$. Major phospholipids are arranged in a bilayer.
$C$. Extensions of the plasma membrane into the cell form mesosomes.
$D$. Tails towards the inner part of lipids are hydrophobic and thus protected from aqueous medium.
$E$. Glycocalyx is present on the outer surface of the plasma membrane.
Choose the correct answer from the options given below: