Select the correct statement from the following regarding cell me…

MCQ

Select the correct statement from the following regarding cell membrane.

A
$Na^+$ 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.
✓
Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.

✓

Answer

Correct option: D.

Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.

d
(d) : According to the fluid mosaic model of cell membrane structure proposed by Singer and Nicolson $(1972)$ plasma membrane contains about $50-60\%$ proteins and $50-40\%$ lipids. Lipids form a bilayer with hydrophilic heads pointing outwards. Cell membrane allows transport of some molecules bypassive transport $e.g.$, water, neutral solutes while some are transported actively $e.g.$, $Na^+/K^+$ pump.

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