Question

Select the correct statement from the following regarding cell membrane

• A. $N{a}^{+}$ and $K^{+}$ ions move across cell membrane by passive transport
• B. Proteins make up 60 to 70% of the cell membrane
• C. Lipids are arranged in a bilayer with polar heads towards the inner part
• D. Fluid mosaic model of cell membrane was proposed by Singer and Nicolson

Answer 1

Answer: (D)

In 1972, singer and nicholson proposed fluid mosaic model for internal structure of plasma membrane.this is most widely accepted model for plasma membrane. According to this model, a membrane consists of continous bilayer of phospholipid molecules in which globular proteins are embedded. the lipids are arranged in a bilayer with polar heads toward outside and non-polar tails towards inside.