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Select the correct statement from the following regarding cell membrane.
(a) and ions move across cell membrane by passive transport
(b)Proteins make up to 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

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Important Questions on Cell Biology
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Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?

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Contractile vacuoles in amoeba

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Grapes were put in a concentrated sugar solution. On examination after hours, the grapes were shrunken. This is because,

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Totipotent cell is
