NEET2002BotanyCell - The Unit of LifeActual
In fluid mosaic model of plasma membrane:
Options
- Aupper layer is non-polar and hydrophilic.
- Bpolar layer is hydrophobic.
- Cphospholipids form a bimolecular layer in the middle part.
- Dproteins form a middle layer.
Correct answer
C. phospholipids form a bimolecular layer in the middle part.
Step-by-step solution
S. J Singer and G. L Nicholson proposed fluid mosaic model of cell membranes. According to this model, the plasma membrane is formed of "protein icebergs in the sea of lipids". The membrane is not solid but is quasi-fluid. The lipids of the membrane form a bilayer which is interrupted by the embedded protein molecules. Related Theory Depending on the degree of association and the ability of separation, the membrane proteins are classified into two types, which are: internal proteins also known as intrinsic or integ