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5 Written questions

5 Matching questions

  1. kinetic energy
  2. exocytosis
  3. second law of thermodynamics
  4. adenosine triphosphate (ATP)
  5. cellular respiration
  1. a The movement of materials out of the cytoplasm of a cell by the fusion of vesicles with the plasma membrane.
  2. b 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.
  3. c The energy of motion; the energy of a mass of matter that is moving. Moving matter does work by imparting motion to other matter.
  4. d 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).
  5. e Main energy source for cells.

5 Multiple choice questions

  1. The energy that matter possesses because of its location or arrangement. Water behind a dam and chemical bonds possess potential energy.
  2. Method by which organisms regulate solute concentrations and balance the gain and loss of water.
  3. Referring to a solution that, when surrounding a cell, will cause the cell to lose water.
  4. A method of metabolic control in which a product of a metabolic pathway acts as an inhibitor of an enzyme within that pathway.
  5. 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 True/False questions

  1. active siteThe 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.


  2. entropyA measure of disorder. One form of disorder is heat, which is random molecular motion.


  3. endocytosisCellular uptake of molecules or particles via formation of new vesicles from the plasma membrane.


  4. heatThe capacity to perform work, or to rearrange matter.


  5. enzymeA 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.