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Biochemistry Questions - All Grades

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Grade 9 Macromolecules
What is the primary purpose and function of enzymes, in the context of reactions that occur within living cells?
  1. They lower the active site energy of the reaction.
  2. They lower the speed of the reaction.
  3. They lower the temperature of the reaction.
  4. They lower the activation energy of the reaction.
Grade 7 Macromolecules
What are the monomers of proteins?
  1. sugars
  2. carbon
  3. amino acids
  4. ribosomes
Grade 10 Macromolecules
Grade 7 Biochemical Pathways
What is the first part of photosynthesis?
  1. Kreb's cycle
  2. Calvin cycle
  3. Light reactions
  4. Glycolysis
Grade 10 Macromolecules
A monosaccharide is a                .
  1. carbohydrate
  2. lipid
  3. nucleic acid
  4. protein
Grade 8 Biochemical Pathways
What is the source of energy for photosynthesis?
  1. sunlight
  2. carbon dioxide
  3. glucose
  4. water
Grade 6 Biochemical Pathways
In what process do animal cells break down food to get energy?
  1. replication
  2. respiration
  3. cell cycle
  4. photosynthesis
Grade 9 Macromolecules
The reactants in an enzyme-catalyzed reaction are called the
  1. active sites.
  2. elements.
  3. inhibitors.
  4. substrates.
Grade 3 Biochemical Pathways
Where does photosynthesis happen?
  1. root
  2. stem
  3. flower
  4. leaf
Grade 12 Macromolecules
Enzymes and some hormones are examples of
  1. proteins.
  2. carbohydrates.
  3. lipids.
  4. nucleic acids.
Grade 9 Macromolecules
How do enzymes help chemical reactions to occur?
  1. They speed up reactions by adding more substrates to react with enzymes.
  2. They slow down reactions by increasing the activation energy.
  3. They speed up chemical reactions by lowering the activation energy required.
  4. They slow down reactions by changing the overall temperature of the reaction.
Grade 9 Biochemical Pathways
Which statement describes cellular respiration?
  1. the process of decomposing chemical energy stored in bonds into energy that can be used by the cell
  2. the process of creating food for the cell
  3. the process of combining oxygen and water to produce another substance to be transported
  4. the process of making proteins
Grade 9 Biochemical Pathways
Which process is NOT a stage of cell respiration?
  1. Calvin cycle
  2. Krebs cycle
  3. glycolysis
  4. electron transport chain
Grade 8 Biochemical Pathways
Which statement is TRUE statement about cellular respiration?
  1. Cellular respiration converts energy directly from the Sun into energy stored in chemical bonds.
  2. Cellular respiration occurs in plant cells and in animal cells.
  3. Cellular respiration cannot occur without sunlight.
  4. None of the above
Grade 7 Biochemical Pathways
How do plants use carbon dioxide in photosynthesis?
  1. It is used for cellular respiration.
  2. It is used to produce sunlight.
  3. It is used to produce sugar.
  4. It is released as a product of photosynthesis.
Grade 12 Macromolecules
How are enzymes denatured?
  1. water
  2. pH
  3. temperature
  4. temperature and pH
Grade 5 Biochemical Pathways
Which process produces carbon dioxide?
  1. photosynthesis
  2. cellular respiration
Grade 7 Biochemical Pathways
What is the process in which substances are broken down to release energy?
  1. succession
  2. cellular respiration
  3. transverse
  4. photosynthesis
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