Transport in Plants Question 4
4. The main difference between active and passive transport across cell membrane is :
[2019]
(a) active transport occurs more rapidly than passive transport.
(b) passive transport is non-selective whereas active transport is selective.
(c) passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes.
(d) passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel proteins.
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Answer : c
Hints & Solutions
(c) In active transport, materials are transported across a membrane with the help of mobile carrier protein and ATP. In passive transport, substances move along the concentration gradient, i.e., from its higher concentration to its lower concentration.
