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Twelfth Grade (Grade 12) Macromolecules Questions

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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
The function of lipids is
  1. building cell membranes.
  2. long-term energy storage.
  3. insulation.
  4. all of the above
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
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 Macromolecules
Which organic molecule is represented by the structural formula below?
Structural Formula - Carbon Chain Glucose
  1. sucrose
  2. fatty acid
  3. glucose
  4. starch
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 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 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
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.
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