Question

Which of the following statements is not true for plasma membrane?

• A. Carbohydrate is never found in it
• B. Proteins are present integrated as well as loosely associated with the lipid bilayer
• C. It is present in both plant and animal cell
• D. Lipid is present as a bilayer in it

Answer 1

The correct option is A Carbohydrate is never found in it

Occurrence of plasma membrane

Plasma membrane is present in both prokaryotic and eukaryotic cells. Also, it is present in both plant as well as animal cells.

Lipid bilayer

Plasma membrane is made up of a bilayer of phospholipid.



Types of proteins present

Peripheral proteins are loosely associated and usually lie on the surface of the plasma membrane while the integral proteins are partially or totally buried in the membrane.

Presence of carbohydrates

In a plasma membrane, carbohydrates are associated with lipids and proteins to form glycolipids and glycoproteins respectively. These have an important role in signalling pathways and also act as cell surface markers.

Final answer: d) Carbohydrate is never found in it