NEET 2012 Biology question

Select the correct statement from the following regarding cell membrane

(1)Fluid mosaic model of cell membrane was proposed by Singer and NicolsonCorrect
(2) and ions move across cell membrane by passive transport
(3)Proteins make up 60 to 70% of the cell membrane
(4)Lipids are arranged in a bilayer with polar heads towards the inner part

Answer: (1)

Solution

The fluid mosaic model of the plasma membrane was proposed by S. J. Singer and G. L. Nicolson in 1972, so (1) is correct. (2) is wrong: and are moved across the membrane by active transport (the - pump uses

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Question ID VK-091221