AP BIOLOGY

Detailed explanation-1: -In this biological process, energy is not required for transporting the molecules, as the biochemicals move from a region of higher concentration to a region of lower concentration. All particles which are easily soluble are transported through passive transport.

Detailed explanation-2: -There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.

Detailed explanation-3: -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).

Detailed explanation-4: -This statement is false. Passive transport does not require energy, and active transport does. Passive and active transport both utilize transport proteins to move substances across a cell membrane.

Detailed explanation-5: -Passive transport does not require the cell to expend any energy and involves a substance diffusing down its concentration gradient across a membrane.