Question

Which of the following statements about passive transport is correct?

A. Passive transport requires energy input to move substances across the membrane.
B. Passive transport always occurs against the concentration gradient.
C. Passive transport includes processes like active transport and vesicular transport.
D. Passive transport allows substances to move across the membrane without energy expenditure.

Answer 1

Passive transport allows substances to move across the membrane without energy expenditure.

Step-by-step explanation:

Passive transport is the movement of substances across a cell membrane without the cell expending any energy. It occurs when substances move from an area of higher concentration to an area of lower concentration, down their concentration gradient. One correct statement about passive transport is that it allows substances to move across the membrane without energy expenditure (Option D).