20 Questions
What is the primary role of chlorophyll in the process of photosynthesis?
To absorb light energy and convert it into chemical energy
Which of the following is NOT a requirement for photosynthesis to occur?
Oxygen
What is the equation for photosynthesis?
Light energy + CO₂ + H₂O → C₆H₁₂O₆ (glucose) + O₂ (oxygen)
What happens to excess glucose produced during photosynthesis?
It is stored in the roots, stems, and seeds as starch
Why do plants stop making food at night when it is dark?
Because photosynthesis requires light energy to produce food
What is the primary reason for the presence of starch in the part of the leaf exposed to light?
The leaf is converting glucose into starch
What is the most likely reason why the rate of photosynthesis would decrease in an experiment using a water plant and a lamp?
The carbon dioxide in the water has been depleted
Which of the following is not a requirement for photosynthesis?
Oxygen
What is the role of stomata in the process of photosynthesis?
To facilitate gas exchange
What is the equation for photosynthesis?
6CO2 + 6H2O → C6H12O6 + 6O2
Plants release carbon dioxide as a byproduct of photosynthesis.
False
Chlorophyll is the green substance in plants that traps light energy.
True
Stomata are primarily responsible for the transport of water within the plant.
False (Stomata are for gas exchange, roots and xylem transport water)
Animals and plants both obtain their energy directly from the food they eat.
False (Plants make their own food through photosynthesis)
Photosynthesis only occurs during the day when there is light.
True
What are the tiny openings on leaves called?
Stomata
What is the equation for photosynthesis?
Light energy + CO₂ + H₂O → sugar + O₂ (oxygen)
Where is excess glucose stored in plants?
Excess glucose is converted to starch and stored in different parts of the plant, such as roots, stems, and seeds.
Explain the role of stomata in photosynthesis.
Stomata are tiny openings on the leaves that allow carbon dioxide to enter and oxygen to exit, facilitating gas exchange necessary for photosynthesis.
How is water transported to the leaves of the plant?
Water is absorbed by the roots and transported to the leaves through the xylem vessels.
Study Notes
Photosynthesis
Key Concepts
- Photosynthesis is the process by which plants make food using light, water, and carbon dioxide, producing sugar (glucose) and oxygen.
- Chlorophyll is a green substance in plants that traps light energy.
- Stomata are tiny openings on leaves for gas exchange (carbon dioxide in, oxygen out).
Process Overview
- Light energy is absorbed by chlorophyll in the leaves.
- Carbon dioxide enters through stomata, while water is absorbed by roots and transported to the leaves.
- Light energy is used to convert CO₂ and H₂O into glucose and O₂.
- Excess glucose is converted to starch and stored in roots, stems, and seeds (e.g., potatoes, rice, corn).
Requirements
- Light energy is required for photosynthesis.
- Carbon dioxide is obtained from the air through stomata.
- Water is absorbed by roots and transported to the leaves.
Equation for Photosynthesis
- Light energy + CO₂ + H₂O → C₆H₁₂O₆ (glucose) + O₂ (oxygen)
Review key concepts of photosynthesis, including the process, chlorophyll, and stomata. Prepare for your exam with these concise revision notes and practice questions.
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