Please solve question no.2,3,4 and 5. Please solve these 5 questions they are really very answers.

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Active transport:

  • It is the movement of molecules across a cell membrane against its concentration gradient (from low to high concentration).
  • Energy in the form of ATP is required, since the molecules move against the normal flow.


  • It is the overall movement of material from an area of higher concentration to an area of lower concentration.
  • It requires no energy
3. Hypotonic solution
A   hypotonic solution   is the one whose solute concentration is lower than the solute concentration inside the cell. When a cell is placed in a hypotonic solution, then water moves in the cell through osmosis, leading to swelling of cell which may result in cell bursting.

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