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Eighth Grade (Grade 8) Biochemistry Questions

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Grade 8 Biochemical Pathways
What are the products of cellular respiration?
  1. sugar, oxygen, and energy
  2. carbon dioxide, water, and energy
  3. oxygen, water, and energy
  4. carbon dioxide, sugar, and energy
Grade 8 Macromolecules
The substances that make up body proteins are
  1. nutrients.
  2. carbohydrates.
  3. amino acids.
  4. minerals.
Grade 8 Biochemical Pathways
All the chemical activities in an organism is
  1. ingestion.
  2. metabolism.
  3. respiration.
  4. excretion.
Grade 8 Biochemical Pathways
Which statement is TRUE about photosynthesis?
  1. It occurs only in cells that contain chlorophyll.
  2. It occurs when light energy is not available.
  3. It does not form a cycle with cellular respiration.
  4. It converts sugar and oxygen into carbon dioxide and water.
Grade 8 Macromolecules
The primary function of a protein is to
  1. provide energy.
  2. build and repair body tissue.
  3. carry genetic information.
  4. none of the above
Grade 8 Biochemical Pathways
What energy-releasing process does not require oxygen?
  1. photosynthesis
  2. cellular respiration
  3. fermentation
  4. transformation
Grade 8 Biochemical Pathways
What process produces carbon dioxide?
  1. photosynthesis
  2. replication
  3. mutation
  4. cellular respiration
Grade 8 Macromolecules
What is the primary function of ATP in cells?
  1. ATP is the energy that cells use to do their work.
  2. ATP creates glucose in plants.
  3. ATP uses oxygen to make plants grow.
  4. ATP is another name for chloroplasts.
Grade 8 Biochemical Pathways
What is the most important purpose of photosynthesis in plants?
  1. to create oxygen
  2. to store energy in the form of glucose
  3. to break down glucose into carbon dioxide and water
  4. to create sunlight
Grade 8 Biochemical Pathways
What process occurs when yeast and other single-celled organisms break down sugars?
  1. lactic acid fermentation
  2. photosynthesis
  3. cellular respiration
  4. alcoholic fermentation
Grade 8 Biochemical Pathways
Which organisms carry out cellular respiration?
  1. autotrophs
  2. heterotrophs
  3. animals
  4. plants
  5. all organisms
Grade 8 Biochemical Pathways
What are the products of photosynthesis?
  1. carbon dioxide and water
  2. oxygen and sugar
  3. oxygen and carbon dioxide
  4. water and sugar
Grade 8 Macromolecules
What is glucose made of?
  1. chlorophyll, chloroplasts, and sugar
  2. carbon, hydrogen, and oxygen
  3. water, hydrogen, and oxygen
  4. chlorophyll, energy, and carbon
Grade 8 Biochemical Pathways
Which statement is true about the energy used in the light-independent reactions of photosynthesis?
  1. It comes directly from the Sun.
  2. It comes from molecules stored in the roots of the plant.
  3. It is produced during the Calvin cycle.
  4. It is produced in the light-dependent reactions.
Grade 8 Biochemical Pathways
Why do plants generate starch from glucose?
  1. Plants can use starch to make chloroplasts.
  2. Plants store energy for later as starch.
  3. Plants use starch for photosynthesis.
  4. Plants use starch for respiration.
Grade 8 Biochemical Pathways
Which condition will not speed up the rate of photosynthesis?
  1. more sunlight
  2. closed stomata
  3. good water supply
  4. good air supply
Grade 8 Biochemical Pathways
The process were cells obtain energy from sugar molecules is
  1. photosynthesis.
  2. the nitrogen cycle.
  3. cellular respiration.
  4. homeostasis.
Grade 8 Biochemical Pathways
The process where cells obtain energy from sugar molecules is
  1. biotic.
  2. the nitrogen cycle.
  3. cellular respiration.
  4. food chains.
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