Question

According to mosaic model, plasma membrane is made up of

• A. Cellulose and hemicellulose
• B. Phospholipid and integral protein
• C. Phospholipid, extrinsic and intrinsic protein
• D. Phospholipid and hemicellulose

Answer 1

The correct option is C Phospholipid, extrinsic and intrinsic protein

Singer and Nicolson proposed Fluid mosaic model in which the proteins are interspersed and floating like mosaic on a lipid bilayer made up of phospholipids having polar head made of phosphate and non-polar lipid tails. Some proteins called intrinsic proteins traverse through the entire width of membrane and cannot be separated easily from the membrane while some proteins called extrinsic proteins are present on the surface only and can be easily separated from the membrane.

So, the correct answer is 'Phospholipid, extrinsic and intrinsic protein'