(B) The membrane transport mechanisms are defined as follows:$1$. $Uniport$: $A$ molecule moves across the membrane independent of other molecules $(P

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(B) The membrane transport mechanisms are defined as follows:$1$. $Uniport$: $A$ molecule moves across the membrane independent of other molecules $(P-I)$.$2$. $Symport$: Two molecules cross the membrane in the same direction $(Q-III)$.$3$. $Antiport$: Two molecules move in opposite directions $(R-II)$.Therefore,the correct matching is $P-I, Q-III, R-II$.

Class 11 Biology Transport in Plants Means of transport

Medium

Match the following columns regarding membrane transport mechanisms:

Column-$I$ Column-$II$

$P$. Uniport $I$. $A$ molecule moves across the membrane independent of other molecules.

$Q$. Symport $II$. Two molecules move in opposite directions.

$R$. Antiport $III$. Two molecules cross the membrane in the same direction.

Column-$I$	Column-$II$
$P$. Uniport	$I$. $A$ molecule moves across the membrane independent of other molecules.
$Q$. Symport	$II$. Two molecules move in opposite directions.
$R$. Antiport	$III$. Two molecules cross the membrane in the same direction.