Question

1. complete the chart to compare passive and active transport across a cell membrane. requires energy? movement of molecules examples: passive transport high concentration to low concentration • diffusion of carbon dioxide • active transport movement of sugar via protein pumps •

Explanation:

Passive transport does not require energy as molecules move down the concentration gradient (high to low). Examples include diffusion of carbon - dioxide and osmosis. Active transport requires energy to move molecules against the concentration gradient (low to high), like the movement of sugar via protein pumps and sodium - potassium pump.

Answer:

	Passive transport	Active transport
Movement of molecules	High concentration to low concentration	Low concentration to high concentration
Examples:	Diffusion of carbon dioxide, Osmosis	Movement of sugar via protein pumps, Sodium - potassium pump