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5 Written questions

5 Matching questions

  1. buffer
  2. carbohydrate
  3. isotope
  4. covalent bond
  5. compound
  1. a pure substance with unique properties; formed when two or more different elements combine.
  2. b mixture that can react with an acid or a base to maintain the pH within a specific range.
  3. c type of chemical bond formed when atoms share electrons.
  4. d organic compound containing carbon, hydrogen, and oxygen in a ratio of on oxygen and two hydrogen atoms for each carbon atom.
  5. e two or more atoms of the same element having different numbers of neutrons.

5 Multiple choice questions

  1. organic compound made of amino acids joined by peptide bonds; primary building block of organisms.
  2. center of an atom; contains neutrons and protons. In eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA
  3. carbon compound joined by peptide bonds; building block of proteins.
  4. substance dissolved in a solvent.
  5. particle without a charge in an atom's nucleus

5 True/False questions

  1. moleculecompound whose atoms are held together by covalent bonds

          

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

          

  3. solutionsubstance dissolved in a solvent.

          

  4. solventsubstance in which another substance is dissolved.

          

  5. productsubstance formed by a chemical reaction; located on the right side of the arrow in a chemical equation.