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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
What property makes phospholipids the ideal organic molecule to make up the cell membrane?
  1. Phospholipids dissolve easily in water, so materials can pass through them without the need for energy.
  2. Phospholipids contain many mitochondria, so the cell membrane has all the energy it needs to undergo mitosis.
  3. Phospholipids maintain their shape all the time, so organisms made from these cells can grow very large.
  4. Phospholipids have hydrophobic and hydrophilic ends, so cells can live in an aqueous environment and still carry out all their functions.
Grade 12 Macromolecules
Enzymes and some hormones are examples of
  1. proteins.
  2. carbohydrates.
  3. lipids.
  4. nucleic acids.
Grade 12 Macromolecules
All are properties of water except
  1. adhesion.
  2. cohesion.
  3. heat capacity.
  4. enzyme ability.
Grade 12 Macromolecules
Grade 12 Macromolecules
How are enzymes denatured?
  1. water
  2. pH
  3. temperature
  4. temperature and pH
Grade 12 Biochemical Pathways
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
Grade 12 Macromolecules
Carbohydrates include
  1. fructose.
  2. starch.
  3. polysaccharides.
  4. all of the above
Grade 12 Macromolecules
Which molecule is most likely an enzyme?
  1. maltose
  2. sucrose
  3. lipase
  4. taurine
Grade 12 Biochemical Pathways
Which process requires an input of energy?
  1. exergonic reactions
  2. endergonic reactions
  3. hydrolysis
  4. cellular respiration
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 Macromolecules
Which organic molecule contains this type of functional group?
Structural Formula - Phosphate
  1. carbohydrate
  2. protein
  3. steroid
  4. nucleic acid
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