Complete the following paragraph by filling in the blanks (I) to (V) with appropriate words. (5) The movement of a (I) ________ from it’s (II) _______ concentration to (III) __________ concentration is called active transport. It is just opposite to the happen in (IV) ___________. Active transport occur through (V) ___________.
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To find : (I) to (V) given in stanza
Answer :
(I) Solute
(II) lower
(III) higher
(IV) passive transport
(V) transport proteins
Additional information :
- Movement of solute from lower concentrations to higher concentrations (of solution) across a cell membrane without requiring energy is called passive transport
- Passive transport is further sub-divided into 2 part - (I) Passive Diffusion (II) Facilitated Diffusion
- passive diffusion - It is movement of molecules from higher concentrations to lower concentrations (that is towards concentration gradient) without use of energy or any transport proteins
- Facilitated Diffusion - movement of molecules along with concentration gradient without using energy but uses transport proteins
- Active transport - it is movement of molecules against there concentration gradient with use of energy and transport proteins.
- As Facilitated Diffusion & Active transport require transport proteins , there is a point when all transport proteins will be acquired by molecules such that no further molecules can add up . At this point transport is maximum.
- As passive diffusion don't use transport proteins, there is no such saturation point , until there is a presence of concentration gradient
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