5 Written questions
5 Matching questions
- cellular respiration
- competitive inhibitor
- induced fit
- a Cellular uptake of molecules or particles via formation of new vesicles from the plasma membrane.
- b The aerobic harvesting of energy from food molecules; the energy-releasing chemical breakdown of food molecules, such as glucose, and the storage of potential energy in a form that cells can use to perform work; involves glycolysis, the citric acid cycle, and oxidative phosphorylation (the electron transport chain and chemiosmosis).
- c A transport protein in the plasma membrane of some plant or animal cells that facilitates the diffusion of water across the membrane (osmosis).
- d A substance that reduces the activity of an enzyme by binding to the enzyme's active site in place of the substrate. A competitive inhibitor's structure mimics that of the enzyme's substrate.
- e 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.
5 Multiple choice questions
- The passage of a substance through a specific transport protein across a biological membrane down its concentration gradient.
- An organic molecule serving as a cofactor. Most vitamins function as coenzymes in important metabolic reactions.
- Cellular "eating"; a type of endocytosis whereby a cell engulfs macromolecules, other cells, or particles into its cytoplasm.
- Method by which organisms regulate solute concentrations and balance the gain and loss of water.
- 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).
5 True/False questions
hypertonic solution → Referring to a solution that, when surrounding a cell, will cause the cell to lose water.
heat → 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.
thermodynamics → The movement of materials out of the cytoplasm of a cell by the fusion of vesicles with the plasma membrane.
energy coupling → The capacity to perform work, or to rearrange matter.
adenosine triphosphate (ATP) → The diffusion of a substance across a biological membrane, without any input of energy.