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5 Written questions

5 Matching questions

  1. reactant
  2. covalent bond
  3. macromolecule
  4. nucleotide
  5. ion
  1. a type of chemical bond formed when atoms share electrons.
  2. b a subunit of nucleic acid formed from a single sugar, a phosphate group, and a nitrogenous base.
  3. c substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
  4. d atom that is negatively or positively charged because it have lost or gained one or more electrons.
  5. e large molecule formed by joining smaller organic molecules together

5 Multiple choice questions

  1. reactant to which an enzyme binds
  2. protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction
  3. large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.
  4. organic compound made of amino acids joined by peptide bonds; primary building block of organisms.
  5. mixture that can react with an acid or a base to maintain the pH within a specific range.

5 True/False questions

  1. acidhydrophobic biological molecule composed mostly or carbon and hydrogen; fats, oils, and waxes are lipids

          

  2. pHmeasure of the concentration of hydrogen ions (H+) in a solution.

          

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

          

  4. solventsubstance in which another substance is dissolved.

          

  5. catalystsubstance that speeds up a chemical reaction by reducing the activation energy.

          

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