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Eleventh Grade (Grade 11) Biochemistry Questions

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Grade 11 Macromolecules
A protein catalyst that holds significance for living cells is a(n)
  1. feedback activator.
  2. enzyme.
  3. nutrient.
  4. feedback inhibitor.
  5. metabolite.
Grade 11 Biochemical Pathways
What reaction is performed to recycle the NAD+ needed for efficient respiration?
  1. glycolysis
  2. Krebs cycle
  3. oxidative phosphorylation
  4. lactic acid fermentation
  5. chemiosmosis
Grade 11 Biochemical Pathways
Organisms participate in an exchange of matter and energy with their environments. Chloroplasts in plants, for example, change solar energy into
  1. oxygen.
  2. kinetic energy.
  3. carbon monoxide and water.
  4. the potential energy of chemical bonds.
  5. the energy of motion.
Grade 11 Biochemical Pathways
A pathway that releases energy as a result of breaking down complex molecules to simpler compounds is
  1. a biochemical pathway.
  2. an anabolic pathway.
  3. a catabolic pathway.
  4. a metabolic pathway.
  5. metabolism.
Grade 11 Macromolecules
Define organic molecules.
  1. molecules of life that are built around chains of carbon atoms
  2. molecules composed of elements besides carbon
  3. molecules of single-subunits (small)
  4. molecules of many subunits (large)
Grade 11 Biochemical Pathways
Which trait cannot be attributed to a reduced rate of photosynthesis in plants?
  1. fewer cytochrome proteins
  2. increased photorespiration
  3. reduced water availability
  4. increased stomatal openings
Grade 11 Biochemical Pathways
What do all cells need to carry out essential life functions?
  1. glucose
  2. energy
  3. oxygen
  4. lipids
Grade 11 Biochemical Pathways
What condition is necessary for anaerobic respiration to occur?
  1. no ATP available
  2. no oxygen available
  3. too much glucose available
  4. not enough carbon dioxide available
Grade 11 Biochemistry
Which is NOT one of the four main elements in living organisms?
  1. carbon
  2. hydrogen
  3. sulfur
  4. oxygen
Grade 11 Biochemical Pathways
What serves as a driving force for the production of much of the ATP that results from respiration?
  1. electrons that move down a concentration gradient
  2. electrons that move down the electron transport chain
  3. protons that move down a concentration gradient
  4. sodium ions that move down a concentration gradient
  5. pyruvate moving from the cytoplasm to the mitochondria
Grade 11 Macromolecules
Covalent bonds hold the DNA bases together.
  1. True
  2. False
Grade 11 Macromolecules
A, T, G, and C are the bases that make up RNA.
  1. True
  2. False
Grade 11 Biochemical Pathways
All the chemical reactions that an organism undergoes, taken together, are known as
  1. a biochemical pathway.
  2. an anabolic pathway.
  3. a catabolic pathway.
  4. a metabolic pathway.
  5. metabolism.
Grade 11 Macromolecules
Which statement correctly describes one characteristic and essential function of carbon?
  1. It serves as a component of water.
  2. It provides the backbone of all organic molecules.
  3. It serves as part of all hydrogen bonds.
  4. All of the above are true.
Grade 11 Biochemical Pathways
A pathway that consumes energy to build more complex molecules from simpler ones (sometimes known as a biosynthetic pathway) is
  1. a biochemical pathway.
  2. an anabolic pathway.
  3. a catabolic pathway.
  4. a metabolic pathway.
  5. metabolism.
Grade 11 Macromolecules
Choose the two main functions of nucleic acids.
  1. produce energy
  2. make DNA
  3. produce catalysts
  4. make RNA
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