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Twelfth Grade (Grade 12) Biochemistry Questions

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Grade 12 Macromolecules
All are properties of water EXCEPT
  1. adhesion.
  2. cohesion.
  3. heat capacity.
  4. speeding up reactions.
Grade 12 Biochemical Pathways
All of the physical and chemical changes that occur in an organism is                .
  1. metabolism
  2. catabolism
  3. homeostasis
  4. assimilation
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
Which action is common to both fermentation and aerobic cellular respiration?
  1. Oxygen is consumed.
  2. FADH2 is produced.
  3. ATP is synthesized.
  4. Carbon dioxide is consumed.
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
How is fermentation related to the production of bread?
  1. The absence of oxygen converts the sugar in the bread dough into oxygen, which is then removed from the bread.
  2. The ATP produced through fermentation is used by the bakers to knead the dough into the proper shapes.
  3. Yeast cells undergo alcoholic fermentation, which creates carbon dioxide that makes bread rise.
  4. Bacterial cells in the dough convert sugars through lactic acid fermentation into oxygen, allowing the dough to increase in height.
Grade 12 Macromolecules
Which of these describes a substrate?
  1. part of the enzyme that substrate molecules fit into
  2. molecule that the enzyme works on
  3. what the enzyme helps produce from the reaction
Grade 12 Macromolecules
Which type of biomolecule does not form polymers?
  1. lipids
  2. proteins
  3. carbohydrates
  4. nucleic acids
Grade 12 Macromolecules
A polysaccharide that can be made in some animal cells is
  1. starch.
  2. pectin.
  3. glycogen.
  4. cellulose.
Grade 12 Macromolecules
What speeds up chemical reactions?
  1. enzymes
  2. pH
  3. biochemical reactions
  4. activation energy
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 Macromolecules
Which type of molecule is most likely to have this functional group?
Structural Formula - Carboxyl
  1. steroid
  2. carbohydrate
  3. amino acid
  4. alcohol
Grade 12 Biochemical Pathways
Which statement is a true distinction between cellular respiration and fermentation?
  1. NADH is oxidized by the electron transport chain in cellular respiration only.
  2. Fermentation is an example of an endergonic reaction, while cellular respiration is an exergonic reaction.
  3. Substrate-level phosphorylation is unique to fermentation only.
  4. Fermentation is the metabolic pathway of prokaryotes, whereas cellular respiration is used only by eukaryotes.
Grade 12 Macromolecules
ATP, the energy molecule of the cell, is known to perform phosphorylation on many different molecules. What does this mean?
  1. ATP can receive many different phosphate groups.
  2. ATP can convert molecules into nucleic acids.
  3. ATP can donate phosphate groups to other molecules.
  4. ATP can release a large amount of energy when hydrolyzed.
Grade 12 Biochemical Pathways
A plant makes food through photosynthesis and is then eaten by a deer. The deer uses the sugars from the plant to make energy for itself when it runs away from a wolf. Which pathway represents how energy is transformed in this scenario?
  1. light --> chemical --> mechanical
  2. chemical --> kinetic --> heat
  3. heat --> potential --> chemical
  4. mechanical --> heat --> potential
Grade 12 Macromolecules
These monomers link together to form proteins.
  1. amino acids
  2. saccharides
  3. fatty acids
  4. polymers
Grade 12 Macromolecules
Energy is transferred via
  1. fat.
  2. inhibitors.
  3. electromagnetic waves (photons).
  4. telephoto lenses.
Grade 12 Macromolecules
Drugs, pathogens, pesticides, and metabolic imbalances are examples of
  1. enzyme activators.
  2. enzyme inhibitors.
  3. enzyme reaction.
  4. enzyme converters.
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