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Home » The main difference between active and passive transport across cell membrane is : (1) active transport occurs more rapidly than passive transport. (2) passive transport is non-selective whereas active transport is selective. (3) passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes. (4) passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel proteins.
The main difference between active and passive transport across cell membrane is :
(1) active transport occurs more rapidly than passive transport.
(2) passive transport is non-selective whereas active transport is selective.
(3) passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes.
(4) passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel proteins.
biology
The main difference between active and passive transport across cell membrane is :
(1) active transport occurs more rapidly than passive transport.
(2) passive transport is non-selective whereas active transport is selective.
(3) passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes.
(4) passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel proteins.

The correct answer is (3) passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes.

This is because -Materials are transported across a membrane using a mobile carrier protein and ATP in active transport.  Substances travel along in passive transport.  the concentration gradient, i.e., from its highest point to its lowest point  greater concentration in comparison to its lower concentration.

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