Transport in Plants Question 7

7. Movement of ions or molecules in a direction opposite to that of prevailing electrochemical gradient is known as [2000]

(a) diffusion

(b) active transport

(c) pinocytosis

(d) brownian movement

Show Answer

Answer : b

Hints & Solutions

(b) Movement of ions against concentration gradient involves the expenditure of energy. Diffusion involves the movement of solute particles from region of higher concentration to a region of lower concentration. Pinocytosis is cell drinking. Brownian movement is the random to and fro movement of atoms and molecules.



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