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(A) The movement and accumulation of ions across a membrane against their concentration gradient is defined as active transport.Active transport requi

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Active Transport

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(A) The movement and accumulation of ions across a membrane against their concentration gradient is defined as active transport.Active transport requires metabolic energy (usually in the form of $ATP$) to move molecules from a region of lower concentration to a region of higher concentration.Unlike passive transport,which moves substances along the concentration gradient without energy expenditure,active transport is an energy-dependent process.

Column-$I$	Column-$II$
$P$. Diffusion	$I$. Along the gradient, with protein
$Q$. Facilitated transport	$II$. Against the gradient
$R$. Active transport	$III$. Along the gradient, without protein

Movement and accumulation of ions across a membrane against their concentration gradient can be explained by

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Match the following columns:
Column-$I$ Column-$II$
$P$. Diffusion $I$. Along the gradient, with protein
$Q$. Facilitated transport $II$. Against the gradient
$R$. Active transport $III$. Along the gradient, without protein

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