LIFE SCIENCE

Detailed explanation-1: -Simple diffusion and osmosis are both forms of passive transport and require none of the cell’s ATP energy.

Detailed explanation-2: -Passive transport, most commonly by diffusion, occurs along a concentration gradient from high to low concentration. No energy is necessary for this mode of transport.

Detailed explanation-3: -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-4: -Osmosis, facilitated diffusion and simple diffusion do not require energy. They come under passive transport.

Detailed explanation-5: -Passive transport requires no energy input, as compounds are able to move freely across the membrane based only on a favourable concentration gradient (Figure 1.11).