Photosynthesis
9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-LS1-5 · England: GCSE Combined Science: Bioenergetics
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Date
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Question 1
Is photosynthesis exothermic or endothermic?
- A. exothermic: it releases oxygen
- B. neither
- C. endothermic: energy is transferred from light to the chemical store in glucose
- D. exothermic: it releases heat
Question 2
A leaf makes 2 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many carbon dioxide molecules are used?
Answer
Question 3
Which is the balanced symbol equation for photosynthesis?
- A. CO₂ + H₂O → C₆H₁₂O₆ + O₂
- B. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
- C. 6O₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂
- D. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Question 4
Which substance in chloroplasts absorbs the light?
- A. chlorophyll
- B. glucose
- C. starch
- D. cellulose
Question 5
A leaf makes 2 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many oxygen molecules are released?
Answer
Question 6
Which is the balanced symbol equation for photosynthesis?
- A. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 3O₂
- B. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
- C. CO₂ + H₂O → C₆H₁₂O₆ + O₂
- D. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Question 7
Is photosynthesis exothermic or endothermic?
- A. exothermic: it releases heat
- B. exothermic: it releases oxygen
- C. endothermic: energy is transferred from light to the chemical store in glucose
- D. neither
Question 8
A leaf makes 3 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many carbon dioxide molecules are used?
Answer
Question 9
Which is the balanced symbol equation for photosynthesis?
- A. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
- B. CO₂ + H₂O → C₆H₁₂O₆ + O₂
- C. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
- D. 6O₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂
Question 10
Which substance in chloroplasts absorbs the light?
- A. glucose
- B. chlorophyll
- C. cellulose
- D. starch
Question 11
A leaf makes 3 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many oxygen molecules are released?
Answer
Question 12
Which is the balanced symbol equation for photosynthesis?
- A. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
- B. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 3O₂
- C. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
- D. CO₂ + H₂O → C₆H₁₂O₆ + O₂
Question 13
Is photosynthesis exothermic or endothermic?
- A. endothermic: energy is transferred from light to the chemical store in glucose
- B. neither
- C. exothermic: it releases heat
- D. exothermic: it releases oxygen
Question 14
A leaf makes 5 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many carbon dioxide molecules are used?
Answer
Question 15
Which is the balanced symbol equation for photosynthesis?
- A. 6O₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂
- B. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 3O₂
- C. CO₂ + H₂O → C₆H₁₂O₆ + O₂
- D. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Question 16
Is photosynthesis exothermic or endothermic?
- A. endothermic: energy is transferred from light to the chemical store in glucose
- B. neither
- C. exothermic: it releases oxygen
- D. exothermic: it releases heat
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