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1. What is the overall equation for photosynthesis?
6 H2O+6 CO2 --> C6H12O6
2. From where does the energy for photosynthesis come?
Sunlight
3. What plant pigments are involved in photosynthesis?
Chlorophyll A, Chlorophyll B, and carotenoids
4. Explain why chlorophyll appears green to us in terms of what happens to different wavelengths of light that strike a chlorophyll molecule.
We see light that bounces off of objects (reflected light). Chlorophyll is best at trapping and absorbing the red - orange wavelengths of light and the blue, indigo, and violet wavelengths of light. It is not good at absorbing the green wavelengths. The green light is reflected, so it is the part we see. Therefore, chlorophyll looks green to us.
5. How does the amount of energy in light change as the wavelength increases?
As wavelength increases, amount of energy decreases. Thus, violet light (which has a shorter wavelength) has more energy that red light (which has a longer wavelength).
6. In which plant cell organelle does photosynthesis take place?
In the chloroplasts
7. What are the two stages of photosynthesis?
A: light dependant
B: light independent(Calvin Cycle)
B: light independent(Calvin Cycle)
8. In which part of the chloroplast does each stage occur?
A: The light reactions take place in the thylakoids.
B: The Calvin cycle takes place in the stroma.
B: The Calvin cycle takes place in the stroma.
9. What happens to water molecules in the light reactions?
Water molecules (H2O) are split to give electrons, H+ ions, and oxygen gas (O2) .
10. What photosynthesis waste product is formed in the light reactions?
oxygen gas (O2)
11. What two products of the light reactions are used up in the Calvin cycle?
A: ATP
B: NADPH
B: NADPH
12. What happens to carbon dioxide molecules in the Calvin cycle reactions?
In the Calvin cycle, carbon dioxide molecules (CO2) are combined with each other and with the electrons and Hydrogen ions from NADPH to form glucose (C6H12O6).
13. How can cells store sugar that is produced in photosynthesis?
1)Sugar can be broken down by the mitochondria to supply energy to the cell.
2) Sugar also can be linked together in long chains to form cellulose and build the plant cell wall.
3) It can be moved to another part of the plant for energy, or moved to the root system for storage (in the form of starch).
2) Sugar also can be linked together in long chains to form cellulose and build the plant cell wall.
3) It can be moved to another part of the plant for energy, or moved to the root system for storage (in the form of starch).
14. Label the diagram below to summarize the two stages of photosynthesis. Use the word bank below the diagram to fill in the blanks.
1. Light
2. H2O
3. CO2
4. Stroma
5. Granum
6. Light Reactions
7. NADP+
8. ADP+P
9. ATP
10. NADPH
11. Calvin Cycle
12. Thylakiods
13. O2
14. Sugar
2. H2O
3. CO2
4. Stroma
5. Granum
6. Light Reactions
7. NADP+
8. ADP+P
9. ATP
10. NADPH
11. Calvin Cycle
12. Thylakiods
13. O2
14. Sugar