Question
Biology Question on Cell: the unit of life
Fluid mosaic model of cell membrane was put forward by
A
Danielli and Davson
B
Singer and Nicolson
C
Garner and Allard
D
Watson and Crick.
Answer
Singer and Nicolson
Explanation
Solution
According to the fluid mosaic model of cell membrane structure proposed by Singer and Nicolson (1972) plasma membrane contains about 50-60% proteins and 50^0% lipids. Lipids form a bilayer with hydrophilic heads pointing outwards. Cell membrane allows transport of some molecules by passive transport e.g., water, neutral solutes while some are transported actively e.g., Na+/K+ pump.