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5 Written questions

5 Matching questions

  1. amino acid
  2. proton
  3. substrate
  4. mixture
  5. enzyme
  1. a protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction
  2. b positively charged particle in an atom's nucleus.
  3. c combination of two or more different substances in which each substance keeps its individual characteristics; can have a uniform composition (homogeneous) or have distinct areas of substances (heterogeneous).
  4. d carbon compound joined by peptide bonds; building block of proteins.
  5. e reactant to which an enzyme binds

5 Multiple choice questions

  1. atom that is negatively or positively charged because it have lost or gained one or more electrons.
  2. hydrophobic biological molecule composed mostly or carbon and hydrogen; fats, oils, and waxes are lipids
  3. pure substance with unique properties; formed when two or more different elements combine.
  4. mixture that can react with an acid or a base to maintain the pH within a specific range.
  5. negatively charged particle that occupies space around an atom's nucleus.

5 True/False questions

  1. solventsubstance dissolved in a solvent.

          

  2. atombuilding block of matter; contains subatomic particles—neutrons, protons, and electrons

          

  3. covalent bondelectrical attraction between two oppositely charged atoms or groups of atoms.

          

  4. nucleic acidcomplex macromolecule that stores and communicates genetic information.

          

  5. nucleuscenter of an atom; contains neutrons and protons. In eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA

          

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