In the light of the carrier concept,the transport of ions across the membrane is:

By which processes does passive transport occur?

Which of the following transport mechanisms induces conformational changes in proteins?

The transport rate reaches a maximum when:

Which of the following processes is immediately affected by the loss of $ATP$?

$S -$ Statement: Energy is consumed during active transport.
$R -$ Reason: This transport occurs against the concentration gradient of the substances.