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NEET2012BotanyCell - The Unit of LifeActual

Select the correct statement from the following regarding cell membrane.

Options

  1. ANa ⁺ and K ⁺ ions move across cell membrane by passive transport
  2. BProteins make up 60 to 70 % of the cell membrane
  3. CLipids are arranged in a bilayer with polar heads towards the inner part
  4. DFluid mosaic model of cell membrane was proposed by Singer and Nicolson

Correct answer

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

Step-by-step solution

In 1972 , Singer and Nicolson 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 a continuous bilayer of phospholipid molecules in which globular proteins are embedded. The lipids are arranged in a bilayer with polar heads towards outerside.

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