Chapter 5

______ is life's primary source of energy. a. Food b. Water c. Sunlight d. ATP

An enzyme ______ a. is a protein b. lowers the activation energy of a reaction c. is destroyed by the reaction it catalyzes d. a and b

Immerse a living cell in a hypotonic solution, and water will tend to ______ a. diffuse into the cell b. diffuse out of the cell c. show no net movement d. move in by endocytosis

______ can readily diffuse across a lipid bilayer a. Glucose b. Oxygen c. Carbon dioxide d. b and \(c\)

Sodium ions cross a membrane at transport proteins that receive an energy boost. This is a case of a. passive transport b. active transport c. facilitated diffusion \(\mathrm{d} .\) a and \(\mathrm{c}\)

Vesicle formation occurs in ______ a. membrane cycling b. phagocytosis c. endocytosis, exocytosis d. all of the above

The rate of diffusion is affected by ______ a. membrane cycling b. phagocytosis c. molecular size d. all of the above