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Questions and Answers
What is the primary pigment involved in photosynthesis?
What is the primary pigment involved in photosynthesis?
- Xanthophyll
- Chlorophyll (correct)
- Melanin
- Carotenoids
The process of photosynthesis only occurs during the day.
The process of photosynthesis only occurs during the day.
False (B)
What are the two main stages of photosynthesis?
What are the two main stages of photosynthesis?
Light-Dependent Reactions and Light-Independent Reactions (Calvin Cycle)
The formula for photosynthesis can be represented as 6CO2 + 6H2O + Light Energy → C6H12O6 + ____.
The formula for photosynthesis can be represented as 6CO2 + 6H2O + Light Energy → C6H12O6 + ____.
Match the following factors with their effects on photosynthesis:
Match the following factors with their effects on photosynthesis:
Flashcards
What is Photosynthesis?
What is Photosynthesis?
The process by which green plants and some organisms use sunlight to make food (glucose) using chlorophyll.
Photosynthesis Equation
Photosynthesis Equation
6CO2 + 6H2O + Light Energy → C6H12O6 + 6O2 This equation shows the ingredients (carbon dioxide, water, light) and products (glucose, oxygen) of photosynthesis.
Light-Dependent Reactions
Light-Dependent Reactions
The first stage of photosynthesis. Occurs in the thylakoid membranes of chloroplasts. Chlorophyll absorbs sunlight, splitting water molecules and releasing oxygen. Energy is used to produce ATP and NADPH.
Light-Independent Reactions (Calvin Cycle)
Light-Independent Reactions (Calvin Cycle)
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Factors Affecting Photosynthesis
Factors Affecting Photosynthesis
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Study Notes
Photosynthesis Overview
- Photosynthesis is the process used by green plants and some organisms to create food using sunlight and chlorophyll
- This is crucial for all life on Earth as it provides energy
Photosynthesis Equation
- 6CO2 + 6H2O + Light Energy → C6H12O6 + 6O2
- Carbon dioxide + Water + Sunlight → Glucose + Oxygen
Photosynthesis Process
Light-Dependent Reactions
- Occurs in the thylakoid membranes of chloroplasts
- Chlorophyll absorbs sunlight, energizing electrons
- Water molecules are split, releasing oxygen
- Energy from energized electrons creates ATP (energy) and NADPH (electron carrier)
Light-Independent Reactions (Calvin Cycle)
- Occurs in the stroma of chloroplasts
- Uses ATP and NADPH from light-dependent reactions
- Carbon dioxide is converted into organic molecules (glucose)
- Also known as carbon fixation
Factors Affecting Photosynthesis
- Light Intensity: Increased light leads to more photosynthesis (until a limit)
- Carbon Dioxide Concentration: Higher CO2 levels mean more photosynthesis
- Temperature: Photosynthesis works best in an optimal temperature range
- Water Availability: Water is a critical reactant in the process
Importance of Photosynthesis
- Energy Source: Provides food for plants and animals
- Oxygen Production: Releases oxygen into the atmosphere
- Climate Regulation: Absorbs atmospheric carbon dioxide
Additional Notes
- Chlorophyll is the main pigment for photosynthesis
- Accessory pigments (like carotenoids) absorb extra light wavelengths
- Photosynthesis happens in chloroplasts (special organelles)
- Light-dependent reactions need direct sunlight
- Light-independent reactions don't require direct sunlight but need products from the light-dependent reactions
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