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Eighth Grade (Grade 8) Biochemical Pathways Questions

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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 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 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.
Grade 8 Biochemical Pathways
What is the green pigment that traps energy from sunlight?
  1. chloroplast
  2. ATP
  3. chlorophyll
  4. mitochondria
Grade 8 Biochemical Pathways
What is a colored chemical that absorbs light?
  1. stoma
  2. pigment
  3. autotroph
  4. respiration
Grade 8 Biochemical Pathways
Plants take in energy by absorbing
  1. high-energy carbohydrates.
  2. chlorophyll.
  3. chloroplasts.
  4. sunlight.
Grade 8 Biochemical Pathways
What are the products of photosynthesis?
  1. carbon dioxide and oxygen
  2. oxygen and glucose
  3. glucose and water
  4. water and carbon dioxide
Grade 8 Biochemical Pathways
Where does lactic acid fermentation occur?
  1. bread that is rising
  2. any environment without oxygen
  3. muscle cells
  4. mitochondria
Grade 8 Biochemical Pathways
What is the main photosynthetic pigment in chloroplasts?
  1. energy
  2. stomata
  3. chlorophyll
  4. cellulose
Grade 8 Biochemical Pathways
Where does the second stage of cellular respiration take place?
  1. mitochondria
  2. nucleus
  3. cytoplasm
  4. vacuole
Grade 8 Biochemical Pathways
Which compound is produced by the Calvin cycle?
  1. oxygen gas
  2. ADP
  3. sugar
  4. carbon dioxide
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