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Biochemistry Questions - All Grades

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Grade 9 Biochemical Pathways
Which most accurately describes the purpose of cellular respiration?
  1. to decompose glucose into energy that can be used for cellular functions
  2. to decompose usable energy into smaller parts
  3. to decompose different types of substances to be used to construct other parts of the cell
  4. all of the above
Grade 7 Biochemical Pathways
The food produced by photosynthesis is
  1. sucrose.
  2. glucose.
  3. maltose.
  4. cellulose.
Grade 7 Biochemical Pathways
What cell function produces the opposite result of photosynthesis?
  1. cellular respiration
  2. endocytosis
  3. diffusion
  4. osmosis
Grade 8 Biochemical Pathways
Which chemical reaction correctly summarizes photosynthesis?
  1. 4CO2+6H2O+2O2=C6H12O6
  2. 6CO2+6H2O+energy=C6H12O6+6O2
  3. 6H2O+6H2+energy=C6H12O6
  4. 6CO2+6H2O+6O2=C6H12O6+O2
Grade 10 Biochemical Pathways
Living things get the energy they need from
  1. oxygen.
  2. NAD+.
  3. food.
  4. air.
Grade 7 Macromolecules
DNA is a(n)                .
  1. carbohydrate
  2. phospholipid
  3. enzyme
  4. nucleic acid
Grade 4 Biochemical Pathways
What provides the energy for photosynthesis to take place?
  1. air
  2. water
  3. sunlight
  4. soil
Grade 11 Biochemical Pathways
Which molecule serves as the main food source for most known cells?
  1. sucrose
  2. cellulose
  3. PGAL
  4. glucose
Grade 7 Biochemical Pathways
What happens during photosynthesis?
  1. Plants take in oxygen and give off carbon dioxide.
  2. Plants take in oxygen and give off water.
  3. Plants take in glucose and give off carbon dioxide.
  4. Plants take in carbon dioxide and give off oxygen.
Grade 9 Biochemical Pathways
What is the sum of every chemical reaction that occurs in the body?
  1. metabolism
  2. homeostasis
Grade 7 Biochemical Pathways
Which is not used by plants to conduct photosynthesis?
  1. carbon dioxide
  2. sunlight
  3. oxygen
  4. water
  5. All of these are used by plants.
Grade 10 Biochemical Pathways
The process of cellular respiration
  1. occurs only in animals.
  2. is performed only by organisms that cannot perform photosynthesis.
  3. occurs in all organisms.
  4. converts chemical energy in food to usable energy (ATP) in all organisms.
Grade 4 Biochemical Pathways
During photosynthesis, a plant makes sugar and oxygen.
  1. True
  2. False
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.
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