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5 Written questions

5 Matching questions

  1. amino acid
  2. nucleic acid
  3. ion
  4. base
  5. polymer
  1. a carbon compound joined by peptide bonds; building block of proteins.
  2. b substance that releases hydroxide ions (OH-) when dissolved in water; a basic solution has a pH greater than 7.
  3. c atom that is negatively or positively charged because it have lost or gained one or more electrons.
  4. d large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.
  5. e complex macromolecule that stores and communicates genetic information.

5 Multiple choice questions

  1. particle without a charge in an atom's nucleus
  2. building block of matter; contains subatomic particles—neutrons, protons, and electrons
  3. pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means
  4. hydrophobic biological molecule composed mostly or carbon and hydrogen; fats, oils, and waxes are lipids
  5. homogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).

5 True/False questions

  1. pHatom that is negatively or positively charged because it have lost or gained one or more electrons.

          

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

          

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

          

  4. buffersubstance that releases hydroxide ions (OH-) when dissolved in water; a basic solution has a pH greater than 7.

          

  5. polar moleculemolecule with oppositely charged regions