5 Written questions
5 Matching questions
- a An organic molecule serving as a cofactor. Most vitamins function as coenzymes in important metabolic reactions.
- b Cellular "drinking"; a type of endocytosis in which the cell takes fluid and dissolved solutes into small membranous vesicles.
- c A protein (or RNA molecule) that serves as a biological catalyst, changing the rate of a chemical reaction without itself being changed into a different molecule in the process.
- d A measure of disorder. One form of disorder is heat, which is random molecular motion.
- e Cellular "eating"; a type of endocytosis whereby a cell engulfs macromolecules, other cells, or particles into its cytoplasm.
5 Multiple choice questions
- Thermal energy; the amount of energy associated with the movement of the atoms and molecules in a body of matter. Heat is energy in its most random form.
- The energy that matter possesses because of its location or arrangement. Water behind a dam and chemical bonds possess potential energy.
- The capacity to perform work, or to rearrange matter.
- The ability of a solution surrounding a cell to cause that cell to gain or lose water.
- (1) A specific substance (reactant) on which an enzyme acts. Each enzyme recognizes only the specific substrate or substrates of the reaction it catalyzes. (2) A surface in or on which an organism lives.
5 True/False questions
kinetic energy → The energy that matter possesses because of its location or arrangement. Water behind a dam and chemical bonds possess potential energy.
energy coupling → In cellular metabolism, the use of energy released from an exergonic reaction to drive an endergonic reaction.
active transport → The diffusion of a substance across a biological membrane, without any input of energy.
second law of thermodynamics → The principle whereby every energy conversion reduces the order of the universe, increasing its entropy. Ordered forms of energy are at least partly converted to heat.
adenosine triphosphate (ATP) → Main energy source for cells.