The process of engulfing solid food particles by the cell membrane is known as?

In the Singer and Nicolson model of the cell membrane,the extrinsic proteins are .....

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

What is the nature of the association between proteins and lipids in the cell membrane?

Porins are proteins that form huge pores in the outer membranes of the plastids,mitochondria,and some bacteria. Which of the following molecules can pass through them?

What is the cell membrane composed of?