Which one is true for the cell membrane

(A)The ratio of lipids and proteins is fixed in membranes

(B)The amount of carbohydrates is greater than other biomolecules

(C)In human erythrocytes amount of protein is more than that of lipids

(D)All of the above

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Integral or Peripheral proteins classification is based on

(A)protein size

(B)ease of extraction

(C)ease of function

(D)ease of study

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The most improved model of the structure of the cell membrane is

(A)Fluid membrane model

(B)Fluid mosaic model

(C)Sandwich model

(D)unit membrane model

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Lateral movement of which of the following biomolecules takes place within the overall bilayer

(A)lipids

(B)carbohydrates

(C)proteins

(D)Both A and C

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The ability to move within the membrane is measured as its

(A)liquidity

(B)fluidity

(C)viscosity

(D)stability

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The fluid nature of the membrane is also important from the point of view of functions like

(A)cell growth

(B)secretion

(C)cell division

(D)All of the above

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The most important function of plasma membrane is the

(A) transportation of molecules across it

(B)cell division

(C)cell growth

(D)endocytosis

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The movement of molecules with and without requirement of energy are called as

(A)active and passive respectively

(B)passive and active respectively

(C)uphill and downhill respectively

(D)Both A and C

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In membranes carrier proteins are required for

(A)nonpolar molecules

(B)polar molecules

(C)charged molecules

(D)Both B and C

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The movement of water across membranes is from

(A)higher to lower concentration of water

(B)lower to higher concentration water

(C)outside of the cell to its inside

(D)Both A and C

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