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Twelfth Grade (Grade 12) Chemistry Questions

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Grade 12 Organic Chemistry
A student named an alkane 2-ethylpropane. The correct IUPAC name of the alkane is
  1. 2-Methylbutane.
  2. 2,2-Dimethylbutane.
  3. 2,3-Dimethylbutane.
  4. 2,3-Dimethylpentane.
Grade 12 Biochemical Pathways
Photosynthesis occurs in the chloroplasts of                .
  1. ants
  2. plants
  3. grasshoppers
  4. chickens
Grade 12 Organic Chemistry
What would be the IUPAC name of the following compound?

CH3-CH=CH-CH3
  1. But-2-ene
  2. But-1-ene
  3. Pent-1-ene
  4. Pent-2-ene
Grade 12 Macromolecules
Which organic molecule contains this type of functional group?
Structural Formula - Phosphate
  1. carbohydrate
  2. protein
  3. steroid
  4. nucleic acid
Grade 12 Macromolecules
What does an allosteric inhibitor do?
  1. It changes the shape of the enzyme.
  2. It increases the concentration of the products.
  3. It decreases the concentration of the inactive enzymes.
  4. It changes the shape of the substrate.
Grade 12 Biochemical Pathways
What role does oxygen play in cellular respiration?
  1. It is reduced in glycolysis as glucose is oxidized.
  2. It provides electrons to the electron transport chain.
  3. It is required for the production of heat and light.
  4. It serves as the final electron acceptor during the electron transport chain.
Grade 12 Macromolecules
Large biological molecules are synthesized by removing
  1. carbon.
  2. oxygen.
  3. covalent bonds.
  4. peptides.
  5. water.
Grade 12 Macromolecules
Which is the macromolecule?
  1. oxygen
  2. bacteria
  3. protein
  4. fruit fly
Grade 12 Macromolecules
All are properties of water EXCEPT
  1. adhesion.
  2. cohesion.
  3. heat capacity.
  4. speeding up reactions.
Grade 12 Organic Chemistry
What is the IUPAC name of CH3-CH2-CH3?
  1. Propane
  2. Ethane
  3. Methane
  4. Butane
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
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
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
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