When does the rate of active transport reach | vedclass

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(A) Active transport is carried out by membrane proteins. These proteins are highly specific and require energy in the form of $ATP$. Because the numb

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When all protein transporters are being used.

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(A) Active transport is carried out by membrane proteins. These proteins are highly specific and require energy in the form of $ATP$. Because the number of protein transporters in the cell membrane is limited,the rate of transport increases with an increase in the concentration of the substance until all the protein transporters are fully occupied or saturated. Once all transporters are in use,the rate of transport reaches its maximum and cannot increase further,even if the concentration of the substance is increased.

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

When does the rate of active transport reach its maximum?

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