Pumps in cell membranes are made of ........ .

Select the correct statement regarding the cell membrane.

According to the fluid mosaic model (proposed by Singer and Nicolson),the plasma membrane is composed of:

Solid form of food engulfing by cell membrane is called ........

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

The sodium-potassium pump is a .....