5 Written Questions
5 Matching Questions
- hypertonic solution
- facilitated diffusion
- first law of thermodynamics
- a The principle of conservation of energy. Energy can be transferred and transformed, but it cannot be created or destroyed.
- b Method by which organisms regulate solute concentrations and balance the gain and loss of water.
- c Referring to a solution that, when surrounding a cell, will cause the cell to lose water.
- d The passage of a substance through a specific transport protein across a biological membrane down its concentration gradient.
- e A measure of disorder. One form of disorder is heat, which is random molecular motion.
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 change in shape of the active site of an enzyme, induced by entry of the substrate so that it binds more snugly to the substrate.
- Cellular "eating"; a type of endocytosis whereby a cell engulfs macromolecules, other cells, or particles into its cytoplasm.
- The part of an enzyme molecule where a substrate molecule attaches (by means of weak chemical bonds); typically, a pocket or groove on the enzyme's surface.
- A method of metabolic control in which a product of a metabolic pathway acts as an inhibitor of an enzyme within that pathway.
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.
potential energy → The energy that matter possesses because of its location or arrangement. Water behind a dam and chemical bonds possess potential energy.
osmosis → The movement of materials out of the cytoplasm of a cell by the fusion of vesicles with the plasma membrane.
active transport → The movement of a substance across a biological membrane against its concentration gradient, aided by specific transport proteins and requiring input of energy (often as ATP).
noncompetitive inhibitor → A substance that impedes the activity of an enzyme without entering an active site. By binding elsewhere on the enzyme, a noncompetitive inhibitor changes the shape of the enzyme so that the active site no longer functions.