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

Which of the following creates very large pores in the outer membrane of bacteria?

Which of the following has a semi-permeable nature?

The plant cell cytoplasm is surrounded by both cell wall and cell membrane. The specificity of transport of substances is mostly across the cell membrane,because $..........$

What is responsible for the quasi-fluid nature of the cell membrane?

Assertion : $A$ cell membrane shows fluid behaviour.
Reason : $A$ membrane is a mosaic or composite of diverse lipids and proteins.