Question

Which of the following statements about biological membranes are true? Select all that apply.

Select one or more:

a. They are formed primarily of lipid and carbohydrate.

b. Targeting across them requires specific systems

. c. They are dynamic structures.

d. They constitute selectively permeable boundaries between cells and their environment and between intracellular compartments.

e. They are involved in information transduction.

Answer 1

Ans. option A,C and D are correct.

explaination

Biological membranes usually involve two layers of phospholipids with their tails pointing inner, arrangement called a phospholipid bilayer. And groups of carbohydrates are present only on the outer surface of the plasma membrane and are attached to proteins, forming glycoproteins.

Cell membranes are dynamic, in fluid structures, and most of their molecules are able to move about in the plane of the membrane.lipid bilayer provides a basic fluid structure of the membrane.

The selective permeability of biological membranes to small molecules allows cell to control and maintain its internal composition and boundaries between cells and their environment and between intracellular compartments.