Photosynthesis Quiz
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5 questions, one answer each
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1. What is the balanced symbol equation for photosynthesis?
- A. 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
- B. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
- C. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy
- D. 6CO₂ + 12H₂O + light energy → C₆H₁₂O₆ + 6O₂ + 6H₂O
2. Which statement best describes photosynthesis as an endothermic reaction?
- A. It releases heat energy to the surroundings
- B. It absorbs light energy from the surroundings and converts it into chemical energy stored in glucose
- C. It produces oxygen which provides energy for plants
- D. It requires chemical energy to break down glucose into carbon dioxide
3. A plant is grown in a greenhouse with constant temperature and increasing light intensity. The rate of photosynthesis increases at first, then plateaus despite further increases in light intensity. Which factor is now limiting the rate of photosynthesis?
- A. Light intensity
- B. Temperature
- C. Either carbon dioxide concentration or temperature
- D. Chlorophyll concentration
4. A student investigates the effect of carbon dioxide concentration on the rate of photosynthesis in an aquatic plant by measuring oxygen produced. The investigation is carried out at room temperature with constant light intensity. What is the dependent variable in this investigation?
- A. Carbon dioxide concentration
- B. Light intensity
- C. Temperature
- D. Rate of photosynthesis (measured by oxygen production)
5. Explain why glucose produced during photosynthesis must be converted into other compounds such as cellulose, starch, and amino acids rather than being used immediately for respiration.
- A. Because glucose is toxic to plant cells and must be converted immediately
- B. Because the plant needs to store energy for use during night when photosynthesis cannot occur, and because cellulose is needed for cell wall structure and amino acids are needed for protein synthesis and growth
- C. Because respiration only uses glucose during the day
- D. Because plants cannot respire using glucose, only starch