Compare the following processes of transport and choose the correct option:
$S.no.$ Property Facilitated diffusion Active Transport Simple Diffusion
$I.$ Highly specific Yes Yes No
$II.$ Energy as $ATP$ No Yes No
$III.$ Saturation point reached when all carrier proteins are used Yes Yes No
$IV.$ Require transport proteins Yes Yes No

  • A
    Only $II$
  • B
    Only $III$
  • C
    $I, II, III$ and $IV$
  • D
    Only $I$

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Mention the peculiarities of facilitated diffusion.

Active transport is

In which method of transport,does the plasma membrane not require a carrier molecule?

Match the following columns correctly:
Column-$I$Column-$II$
$(a)$ Passive transport$(p)$ Movement from higher concentration to lower concentration, no energy required
$(b)$ Active transport$(q)$ Movement along the concentration gradient, requiring carrier proteins
$(c)$ Facilitated diffusion$(r)$ Movement against the concentration gradient, requiring energy
$(d)$ Osmosis$(s)$ Diffusion of solvent molecules across a semi-permeable membrane

The movement of ions against the concentration gradient is called ........

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