Study Notes
Photosynthesis is the process by which plants make carbohydrates from raw materials using light energy. It occurs in chlorophyll within plant cells, where light energy is converted into chemical energy stored as carbohydrates.
- Photosynthesis — process of making carbohydrates using light energy. Example: Plants use sunlight to convert carbon dioxide and water into glucose and oxygen.
- Chlorophyll — pigment in plants that traps light energy for photosynthesis. Example: Chlorophyll is found in chloroplasts and gives plants their green color.
- Glucose — a simple sugar produced during photosynthesis. Example: Glucose is used by plants for energy, making cell walls, and storing as starch.
- Limiting Factor — a condition that can limit the rate of photosynthesis if not in optimal levels. Example: Low carbon dioxide concentration can limit photosynthesis.
Exam Tips
Key Definitions to Remember
- Photosynthesis: Process by which plants make carbohydrates using light energy.
- Chlorophyll: Pigment that traps light energy for photosynthesis.
- Limiting Factor: Condition that limits the rate of photosynthesis.
Common Confusions
- Photosynthesis is not the same as respiration.
- Chlorophyll is not used up during photosynthesis.
Typical Exam Questions
- What is the main product of photosynthesis? Glucose
- What are the raw materials needed for photosynthesis? Carbon dioxide and water
- How does light intensity affect photosynthesis? Increases the rate until another factor becomes limiting
What Examiners Usually Test
- Understanding of the photosynthesis equation
- Factors affecting the rate of photosynthesis
- Uses of glucose in plants