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Twelfth Grade (Grade 12) Chemistry Questions

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Grade 12 Macromolecules
An ATP molecule is made up of
  1. matrix, inner membrane, and outer membrane.
  2. NADH, NADPH, and FADH.
  3. adenine, phosphate groups, and ribose.
  4. proteins, carbohydrates, and nucleic acids.
Grade 12 Acids and Bases
A solution with a pH of less than 7 is called
  1. neutral.
  2. acidic.
  3. basic.
  4. poison.
Grade 12 Macromolecules
Are enzymes reusable?
  1. yes
  2. no
  3. sometimes
Grade 12 Macromolecules
Enzymes and some hormones are examples of
  1. proteins.
  2. carbohydrates.
  3. lipids.
  4. nucleic acids.
Grade 12 Macromolecules
How are enzymes denatured?
  1. water
  2. pH
  3. temperature
  4. temperature and pH
Grade 12 Macromolecules
The function of lipids is
  1. building cell membranes.
  2. long-term energy storage.
  3. insulation.
  4. all of the above
Grade 12 Biochemical Pathways
How do enzymes make reactions go faster?
  1. They lower activation energy.
  2. They raise the activation energy.
  3. They supply extra reactants.
  4. They limit the amount of products in the reaction.
Grade 12 Macromolecules
All are properties of water except
  1. adhesion.
  2. cohesion.
  3. heat capacity.
  4. enzyme ability.
Grade 12 Macromolecules
Carbohydrates include
  1. fructose.
  2. starch.
  3. polysaccharides.
  4. all of the above
Grade 12 Biochemical Pathways
Which process requires an input of energy?
  1. exergonic reactions
  2. endergonic reactions
  3. hydrolysis
  4. cellular respiration
Grade 12 Macromolecules
Which molecule is most likely an enzyme?
  1. maltose
  2. sucrose
  3. lipase
  4. taurine
Grade 12 Biochemical Pathways
Hydrolysis is a reaction in which
  1. water is added to a polymer and it breaks the polymer down.
  2. water is used to build polymers from monomers.
  3. proteins are made using water.
  4. water is taken away from a monomer.
Grade 12 Biochemical Pathways
Photosynthesis occurs in the chloroplasts of
  1. ants.
  2. plants.
  3. grasshoppers.
  4. chickens.
Grade 12 Biochemical Pathways
Energy is released from ATP when
  1. a phosphate group is added.
  2. amino acids bond to proteins.
  3. a phosphate group is removed.
  4. it is heated by the Sun.
Grade 12 Macromolecules
Catalase is an enzyme that speeds up which reaction?
  1. breakdown of hydrogen peroxide into oxygen and water
  2. breakdown of lipids in the gut
  3. synthesis of proteins from amino acids
  4. breakdown of lactose in the digestive system
Grade 12 Macromolecules
Drugs, pathogens, pesticides, and metabolic imbalances are examples of
  1. enzyme activators.
  2. enzyme inhibitors.
  3. enzyme reaction.
  4. enzyme converters.
Grade 12 Acids and Bases
These help to neutralize acids and bases:
  1. Buffers
  2. Viscous membranes
  3. Selectively permeable membranes
  4. Citric acids
Grade 12 Macromolecules
Energy is transferred via
  1. fat.
  2. inhibitors.
  3. electromagnetic waves (photons).
  4. telephoto lenses.
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