What was the contribution of the scientists Singer and Nicolson $(1972)$?

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:

According to the fluid mosaic model,the cell membrane consists of:

The plasma membrane and the membranes of organelles are primarily composed of which substance?

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

The cell membrane is primarily composed of: