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5 Written questions

5 Matching questions

  1. Covalent Bond
  2. ribonucleic acid(RNA)
  3. Molecules
  4. Atom
  5. solute
  1. a the dissolved substance in a solution.
  2. b the nucleic acids that contains ribose acts in protein synthesis. Present in all living cells. Principal role is to aid as a messenger carrying instructions from DNA for controlling the synthesis of proteins.
  3. c When two or more atoms combine chemically.
  4. d Bond formed from molecules where atoms share electrons.
  5. e The building blocks of elements.

5 Multiple choice questions

  1. functional proteins that act as biological catalysts. A catalyst is a substance that increases the rate of a chemical reaction without becoming part of the product or being changed itself.
  2. Unique substances that cannot be broken down into simpler substances by ordinary chemical methods.
  3. A water molecule is added to each bond, the bond is broken and releases simple sugars.
  4. Contain carbon, hydrogen and oxygen.
  5. Heavier isotopes of certain atoms are unstable and tend to decompose to become more stable.

5 True/False questions

  1. CompoundWhen two or more different atoms bind together to form a molecule.

          

  2. MatterHydroxides ionize and dissociate in water releasing hydroxyl ions (OH-)

          

  3. Dehydration synthesisA water molecule is added to each bond, the bond is broken and releases simple sugars.

          

  4. reactantNegatively charged atomic particles.

          

  5. solutionthe dissolved substance in a solution.