Select the correct statement from the following regarding cell membrane: - Biology MCQ Biology | ExamTest.live | ExamTest.live

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Select the correct statement from the following regarding cell membrane:

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

Solution & Step-by-step Explanation

1. Correct: The Fluid Mosaic Model was proposed by S.J. Singer and G.L. Nicolson in 1972.2. Na^{+} / K^{+} transport is usually active (pump).3. The percentage of protein varies (e.g., 52% in human erythrocytes).4. Polar heads are towards the outer sides; hydrophobic tails are towards the inner part.Shutterstock

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Select the correct statement from the following regarding cell membrane:

A

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

B

Na^{+} and K^{+} ions move across cell membrane by passive transport

C

Proteins make up 60 to 70% of the cell membrane

D

Lipids are arranged in a bilayer with polar heads towards the inner part

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