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Questions and Answers
What is the primary role of chlorophyll in photosynthesis?
What is the primary role of chlorophyll in photosynthesis?
- Combines carbon dioxide and water to form glucose.
- Absorbs light energy and converts it into chemical energy. (correct)
- Releases oxygen as a byproduct of the reaction.
- Provides structural support to the chloroplast.
Which of the following factors would NOT directly affect the rate of photosynthesis?
Which of the following factors would NOT directly affect the rate of photosynthesis?
- Concentration of oxygen in the atmosphere. (correct)
- Availability of sunlight.
- Temperature of the environment.
- Concentration of carbon dioxide in the atmosphere.
Which of the following statements accurately describes the relationship between photosynthesis and respiration?
Which of the following statements accurately describes the relationship between photosynthesis and respiration?
- Respiration produces carbon dioxide, which is used by plants for photosynthesis.
- Photosynthesis uses energy stored in glucose, which is produced by respiration.
- Photosynthesis produces oxygen, which is used by plants for respiration. (correct)
- Respiration uses energy stored in water, which is produced by photosynthesis.
Which of the following is NOT a direct use of glucose produced during photosynthesis by plants?
Which of the following is NOT a direct use of glucose produced during photosynthesis by plants?
How does the presence of stomata on leaves aid in the process of photosynthesis?
How does the presence of stomata on leaves aid in the process of photosynthesis?
Which of the following statements best describes the role of xylem in plant photosynthesis?
Which of the following statements best describes the role of xylem in plant photosynthesis?
If a plant is exposed to an environment with limited carbon dioxide, what is the most likely impact on the rate of photosynthesis?
If a plant is exposed to an environment with limited carbon dioxide, what is the most likely impact on the rate of photosynthesis?
What is the correct chemical formula for glucose, the main product of photosynthesis?
What is the correct chemical formula for glucose, the main product of photosynthesis?
Flashcards
Photosynthesis
Photosynthesis
A process where plants convert light into energy, producing glucose and oxygen.
Chloroplasts
Chloroplasts
Organelles in plant cells where photosynthesis occurs, containing chlorophyll.
Chlorophyll
Chlorophyll
A green pigment in chloroplasts that absorbs light energy for photosynthesis.
Chemical equation for photosynthesis
Chemical equation for photosynthesis
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Reactants of photosynthesis
Reactants of photosynthesis
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Uses of glucose
Uses of glucose
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Factors affecting photosynthesis
Factors affecting photosynthesis
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Endothermic reaction
Endothermic reaction
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Study Notes
Photosynthesis
- Photosynthesis is a process that helps plants grow and survive.
- Takes place in the leaves, specifically within chloroplasts.
- Chloroplasts contain chlorophyll, a pigment that absorbs light energy.
- Light energy is used to convert carbon dioxide and water into glucose and oxygen.
- Chemical equation: 6CO2 + 6H2O → C6H12O6 + 6O2
- Light is required for the reaction to occur, making it an endothermic reaction.
Where Plants Obtain Reactants
- Carbon dioxide diffuses into the leaves through stomata.
- Water is absorbed from the soil by the roots and transported to the leaves via the xylem.
Uses of Glucose
- Plants primarily use glucose and oxygen for respiration (although there is plenty of oxygen in the air).
- Five main uses of glucose by plants:
- Cellular respiration: breaks down glucose to release energy.
- Cellulose production: combines glucose molecules to strengthen cell walls.
- Starch production: forms compact and insoluble starch for long-term storage.
- Amino acid production: combines glucose with nitrate ions from the soil to make amino acids.
- Oil and fat production: stored as future energy resources, especially in seeds.
Factors Affecting Rate of Photosynthesis
- Light intensity
- Temperature
- Carbon dioxide concentration
- Amount of chlorophyll
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