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Questions and Answers
In photosynthesis, what form of energy is converted into chemical energy?
In photosynthesis, what form of energy is converted into chemical energy?
- Heat energy
- Light energy (correct)
- Sound energy
- Kinetic energy
What two substances are used by plants during photosynthesis?
What two substances are used by plants during photosynthesis?
- Oxygen and glucose
- Sugar and sunlight
- Nitrogen and minerals
- Carbon dioxide and water (correct)
What is the balanced chemical equation for photosynthesis?
What is the balanced chemical equation for photosynthesis?
- $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$
- $6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$ (correct)
- $6CO_2 + 12H_2O \rightarrow C_6H_{12}O_6 + 6O_2 + 6H_2O$
- $6O_2 + C_6H_{12}O_6 \rightarrow 6CO_2 + 6H_2O$
If the sun disappeared, approximately how long would it take for photosynthesis to cease?
If the sun disappeared, approximately how long would it take for photosynthesis to cease?
Which part of the electromagnetic spectrum is used by plants in photosynthesis?
Which part of the electromagnetic spectrum is used by plants in photosynthesis?
Why do leaves appear green?
Why do leaves appear green?
Where does photosynthesis occur in plant cells?
Where does photosynthesis occur in plant cells?
What is the name of the pores in leaves where gas exchange occurs?
What is the name of the pores in leaves where gas exchange occurs?
What are the stacks of thylakoids inside chloroplasts called?
What are the stacks of thylakoids inside chloroplasts called?
What is the function of a photosystem in the thylakoid membrane?
What is the function of a photosystem in the thylakoid membrane?
Which of the following occurs during the light-dependent reactions of photosynthesis?
Which of the following occurs during the light-dependent reactions of photosynthesis?
What are the two main stages of photosynthesis?
What are the two main stages of photosynthesis?
What occurs in the Calvin cycle?
What occurs in the Calvin cycle?
Which substance is regenerated in the Calvin cycle to allow it to continue?
Which substance is regenerated in the Calvin cycle to allow it to continue?
What are the inputs for the Light Reactions?
What are the inputs for the Light Reactions?
What are the outputs for the Calvin Cycle?
What are the outputs for the Calvin Cycle?
Which of the following statements best describes the role of ATP and NADPH in the Calvin cycle?
Which of the following statements best describes the role of ATP and NADPH in the Calvin cycle?
If a plant is placed in an environment lacking carbon dioxide, which stage of photosynthesis will be directly affected?
If a plant is placed in an environment lacking carbon dioxide, which stage of photosynthesis will be directly affected?
How does the amount of energy stored in a molecule of glucose compare to the amount of energy in the water and carbon dioxide molecules that were used to produce it?
How does the amount of energy stored in a molecule of glucose compare to the amount of energy in the water and carbon dioxide molecules that were used to produce it?
Which of the following processes is most directly driven by light energy?
Which of the following processes is most directly driven by light energy?
How would a plant's photosynthetic rate be affected if it lacked carotenoids?
How would a plant's photosynthetic rate be affected if it lacked carotenoids?
What is the role of electron carriers such as ferredoxin (Fd) in photosynthesis?
What is the role of electron carriers such as ferredoxin (Fd) in photosynthesis?
The internal space enclosed by the thylakoid membrane is the site of which of the following processes?
The internal space enclosed by the thylakoid membrane is the site of which of the following processes?
If a herbicide blocks the activity of ATP synthase in chloroplasts, what direct effect would this have on photosynthesis?
If a herbicide blocks the activity of ATP synthase in chloroplasts, what direct effect would this have on photosynthesis?
Flashcards
What is Photosynthesis?
What is Photosynthesis?
The process where photoautotrophic organisms convert light energy into chemical energy using water and carbon dioxide.
Light Energy Conversion
Light Energy Conversion
Sunlight absorbed by plants is converted into chemical energy.
What role does the Sun play in providing energy?
What role does the Sun play in providing energy?
The main source of energy for all living organisms.
What are consumers?
What are consumers?
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Cells and Chemical Energy
Cells and Chemical Energy
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Carbon Dioxide and Plants
Carbon Dioxide and Plants
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Photosynthesis Equation
Photosynthesis Equation
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Photoautotrophs
Photoautotrophs
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Visible Light
Visible Light
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Pigments and Light Absorption
Pigments and Light Absorption
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Chloroplasts Role
Chloroplasts Role
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Stomata
Stomata
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Chloroplast Structure
Chloroplast Structure
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Photosystem
Photosystem
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What are Thylakoids?
What are Thylakoids?
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Light-Dependent Phase
Light-Dependent Phase
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The Calvin Cycle
The Calvin Cycle
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What are the phases of the Calvin Cycle?
What are the phases of the Calvin Cycle?
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Phase 1: Carbon Fixation
Phase 1: Carbon Fixation
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Phase 3: Regeneration of Ribulose
Phase 3: Regeneration of Ribulose
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Study Notes
- General Biology 1 covers specialized subjects.
- Week 9 and 10 focus on Photosynthesis.
- The learning objectives include explaining coupled reactions, ATP's role, chlorophyll importance, electron flow in light reactions, and Calvin cycle events.
Connecting the Pictures Activity
- This activity helps show the source of energy in an Ecosystem
Flow of Energy in an Ecosystem
- The sun is the main energy source for living organisms.
- Plants (producers) absorb light energy and convert it to chemical energy.
- Carbon dioxide and water are absorbed by plants for photosynthesis.
- Glucose, containing chemical energy, and oxygen are produced.
- Consumers absorb glucose and oxygen.
- Oxygen helps extract energy from food, and glucose provides chemical energy when broken down.
- Organism cells use this chemical energy to function.
- Carbon dioxide and water are expelled as byproducts, used by plants again.
Photosynthesis Overview
- Photosynthesis is how photoautotrophic organisms convert light energy to chemical energy using water and carbon dioxide.
- The summary equation is 6CO2 + 6H2O → C6H12O6 + 6O2.
- Photoautotrophs are organisms that use chlorophyll to absorb light and make their own food.
What If the Sun Disappeared?
- After 8 minutes and 20 seconds, Earth would stop orbiting and move in a straight line.
- The sun's gravitational force would be lost after this time.
- Plants will begin to die after a day.
- Natural productivity on earth will be reduced on Earth will cease by 99.9% in one day.
- Photosynthesis would stop immediately without sunlight.
- Large plants could survive for years due to stored energy.
The Sun's Wavelength Spectrum
- Visible light is used by plants for photosynthesis.
- The sun releases energy in waves.
Photosynthetic Pigments and Light Absorption
- Pigments specialize in absorbing different light wavelengths.
- Green light is reflected, not absorbed, which is why leaves appear green.
Chloroplasts and Photosynthesis Sites
- Leaves contain mesophyll cells.
- Gas exchange happens through stomata.
Chloroplast Structure
- Each chloroplast contains stacks of thylakoids called grana.
Photosystems
- Photosystems are large protein structures within the thylakoid membrane.
Two Stages of Photosynthesis
- Photosynthesis takes place in two stages.
Light-Dependent Phase and the Calvin Cycle
- Photosynthesis has a light-dependent phase and a Calvin Cycle.
Photosynthesis Plant Leaf Model Activity
- The model represents the process and components involved
Activity 2: Photosynthesis Road Map Overview
- Illustrates the chemical processes of PSII and PSI
Instructions for Road Map
- Watch the video on light-dependent reactions and the Calvin Cycle.
- Use the video and roadmap to follow the movement of chemicals in photosynthesis stages.
- Identify input chemicals in the light-dependent reaction.
Stage 1: Light Reactions
- Light reactions convert light + 2H2O + 2NADP+ + 3ADP + 3P into Oâ‚‚ + 3ATP + 2NADPH within the thylakoid lumen.
Stage 2: The Calvin Cycle
- ATP and NADPH synthesize organic molecules in an anabolic pathway within the stroma.
- Two G3P molecules combine to form one glucose molecule.
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Description
Explore photosynthesis in General Biology 1, weeks 9 & 10. Understand energy flow in ecosystems: how plants convert sunlight into chemical energy, producing glucose and oxygen. Learn about the roles of carbon dioxide, water, and the Calvin cycle.
