NEET BIOLOGY

Detailed explanation-1: -Passive transport does not require the cell to expend any energy and involves a substance diffusing down its concentration gradient across a membrane.

Detailed explanation-2: -Passive transport: This does not require any energy expenditure as it occurs along the concentration gradient of the molecule being translocated. Examples include simple diffusion, facilitated diffusion, and osmosis.

Detailed explanation-3: -Facilitated diffusion is diffusion across a membrane through a protein carrier. This means that material moves across the plasma membrane with the assistance of a protein carrier down a concentration gradient (from high to low concentration) without the expenditure of cellular energy.

Detailed explanation-4: -Three transport processes that do not require energy are; diffusion, osmosis and facilitated diffusion. Facilitated diffusion is a passive process: the solutes move down their concentration gradient and do not require the expenditure of cellular energy for this process.

Detailed explanation-5: -Simple diffusion does not require energy: facilitated diffusion requires a source of ATP.