Why is active transport considered important?

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(B) Active transport is a process that occurs against the concentration gradient,meaning substances are moved from a region of lower concentration to

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Because material is transported from lower concentration to higher concentration

Vedclass · Answer

(B) Active transport is a process that occurs against the concentration gradient,meaning substances are moved from a region of lower concentration to a region of higher concentration.This process requires energy in the form of $ATP$ to pump molecules across the membrane.In contrast,passive transport or diffusion occurs along the concentration gradient,moving substances from higher to lower concentration without the expenditure of energy.

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Choose the correct sentences for diffusion:
$(1)$ In diffusion,molecules move in a random fashion.
$(2)$ Diffusion rates are affected by the gradient of concentration.
$(3)$ Diffusion is a slow process and is dependent on a 'living system'.
$(4)$ Movement by diffusion is passive.

The transport rate reaches a maximum when:

$A-$ In an antiport,both molecules move in opposite directions.
$R -$ In symport,only one molecule crosses the membrane in the same direction.

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