Photosynthesis Quiz
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5 questions, one answer each
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1. Which of the following correctly describes the role of chlorophyll in photosynthesis?
- A. Chlorophyll absorbs light energy and transfers it into chemical energy for carbohydrate synthesis
- B. Chlorophyll produces glucose directly without requiring light energy
- C. Chlorophyll stores carbohydrates in the form of starch
- D. Chlorophyll breaks down carbon dioxide into oxygen and carbon
2. What is the word equation for photosynthesis?
- A. Glucose + oxygen → carbon dioxide + water
- B. Carbon dioxide + water → glucose + oxygen
- C. Starch + light → glucose + water
- D. Carbon dioxide + chlorophyll → glucose + light energy
3. A student investigates the effect of light intensity on the rate of photosynthesis using an aquatic plant. Which variable must be kept constant to ensure a fair test?
- A. The light intensity only
- B. The temperature, carbon dioxide concentration and volume of water only
- C. The light intensity and temperature only
- D. All variables except light intensity
4. A plant is grown in soil lacking sufficient magnesium ions. What would be the most likely consequence?
- A. The plant would be unable to transport glucose through the phloem
- B. The plant would produce insufficient chlorophyll, reducing its ability to photosynthesise
- C. The plant would accumulate excess starch in its leaves
- D. The plant would be unable to synthesise amino acids for growth
5. In an experiment using hydrogencarbonate indicator solution, an aquatic plant is placed in light and dark conditions. The indicator changes colour from orange to yellow in darkness and from orange to purple in light. Which of the following best explains these observations?
- A. The plant produces more glucose in darkness than in light
- B. In light, photosynthesis removes carbon dioxide faster than respiration produces it; in darkness, respiration produces carbon dioxide as there is no photosynthesis
- C. The plant absorbs more water in light conditions
- D. Chlorophyll production increases the pH of the solution in light