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Questions and Answers
Draw the energy cycle.
Draw the energy cycle.
CO2 -> chloroplast -> O2 + glucose -> cellular respiration
In what subcellular structure does photosynthesis occur?
In what subcellular structure does photosynthesis occur?
the chloroplast
What kinds of organisms photosynthesize?
What kinds of organisms photosynthesize?
plants
Write the chemical equation for photosynthesis.
Write the chemical equation for photosynthesis.
In which subcellular structure does cellular respiration occur?
In which subcellular structure does cellular respiration occur?
What organisms undergo cellular respiration?
What organisms undergo cellular respiration?
Write the equation for cellular respiration.
Write the equation for cellular respiration.
Can photosynthesis and cellular respiration occur in the same organism? Explain why or why not in terms of organelles present in various organisms.
Can photosynthesis and cellular respiration occur in the same organism? Explain why or why not in terms of organelles present in various organisms.
What is the ultimate source of energy for almost all living things?
What is the ultimate source of energy for almost all living things?
Describe the process of photosynthesis.
Describe the process of photosynthesis.
What is the purpose of photosynthesis?
What is the purpose of photosynthesis?
Describe the meaning of the term photosynthesis.
Describe the meaning of the term photosynthesis.
Where do light reactions occur?
Where do light reactions occur?
Where does the Calvin cycle occur?
Where does the Calvin cycle occur?
What is the difference between the process of light reactions and the Calvin Cycle?
What is the difference between the process of light reactions and the Calvin Cycle?
Why do we see chlorophyll as green?
Why do we see chlorophyll as green?
What happens in light reactions?
What happens in light reactions?
What happens in the Calvin cycle?
What happens in the Calvin cycle?
Does the Calvin Cycle use sunlight directly?
Does the Calvin Cycle use sunlight directly?
Describe the structure of chloroplast.
Describe the structure of chloroplast.
How are photosynthesis and cellular respiration related?
How are photosynthesis and cellular respiration related?
Study Notes
Energy Cycle
- CO2 enters chloroplasts, undergoing photosynthesis to produce O2 and glucose.
- The process of cellular respiration uses glucose and O2 to release energy, producing CO2 and H2O.
Photosynthesis
- Takes place in the chloroplast, a subcellular structure found in plant cells.
- Organisms that photosynthesize primarily include plants.
- Chemical equation: 6CO2 + 12H2O + light → C6H12O6 + 6O2 + H2O.
- Process converts light energy into chemical energy stored in glucose.
Cellular Respiration
- Occurs in the mitochondria, also a subcellular structure.
- All organisms with mitochondria perform cellular respiration, including plants and animals.
- Equation: C6H12O6 → CO2 + H2O + energy (ATP).
Relationship Between Photosynthesis and Cellular Respiration
- Both processes can occur in the same organism; plants perform both for energy.
- Photosynthesis produces glucose and oxygen, used by the plant for cellular respiration, generating energy.
- The ultimate energy source for nearly all living organisms is sunlight.
Photosynthesis Process
- Begins with light energy transformed into chemical energy, then stored in glucose.
- Purpose: Produce energy for producers (autotrophs).
- The term "photosynthesis" combines "photo" (light) and "synthesis" (producing).
Light Reactions and Calvin Cycle
- Light reactions occur in thylakoids; they convert solar energy to chemical energy (ATP and NADPH).
- The Calvin Cycle takes place in the stroma, using ATP and NADPH to synthesize glucose from carbon dioxide.
- Light reactions require sunlight directly, while the Calvin Cycle does not; it relies on products from light reactions.
Chlorophyll and Plant Structure
- Chlorophyll appears green because it absorbs all other colors of light while reflecting green and some blue light.
- Chloroplast structure: consists of thylakoids arranged in stacks called granum.
Gas Exchange
- Photosynthesis and cellular respiration are interconnected through the exchange of gases: oxygen and carbon dioxide.
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Description
Prepare for your biology exam with this review quiz focused on Chapter 8. The quiz covers the energy cycle, photosynthesis, and the role of chloroplasts. Test your knowledge with key concepts and chemical equations essential for understanding plant biology.
