During photosynthesis, chlorophyll absorbs and reflects energy from green-light waves, making the plant appear green. True or False?
Answer: False
Solution:
During photosynthesis, chlorophyll absorbs energy from blue- and red-light waves, and reflects green-light waves, making the plant appear green.
Enrich your learning:
About Photosynthesis:
- During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil.
- In the plant cell, water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons.
- This converts the water into oxygen and the carbon dioxide into glucose.
- The plant then releases the oxygen back into the air, and stores energy in the form of glucose molecules.
About Chlorophyll:
- Chlorophyll is the light-absorbing pigment, within the thylakoidmembranes of the chloroplast.
- Chloroplasts act as a site of the photosynthesis process in both plants and blue-green algae.
- It is responsible for giving the plant its green color.
- During photosynthesis, chlorophyll absorbs energy from blue- and red-light waves, and reflects green-light waves, making the plant appear green.
About Light-dependent Reactions vs. Light-independent Reactions:
- Photosynthesis involves two main stages: light-dependent reactions and light-independent reactions.
- The light-dependent reactions occur in the thylakoid membrane.
- It relies on sunlight to convert it into chemical energy in the form of ATP and NADPH.
- In contrast, the light-independent reactions, known as the Calvin cycle, take place in the stroma, not requiring light.
- During this stage, ATP and NADPH are utilized to produce carbohydrates from carbon dioxide.
C3 and C4 Photosynthesis:
- Photosynthesis comes in two main varieties: C3 and C4.
- The most common type is C3 photosynthesis, found in most plants.
- It generates a three-carbon compound, 3-phosphoglyceric acid, during the Calvin Cycle, ultimately forming glucose.
- On the other hand, C4 photosynthesis produces a four-carbon intermediate compound, which later splits into carbon dioxide and a three-carbon compound during the Calvin Cycle.
- C4 photosynthesis is advantageous in low light or arid conditions due to its ability to yield higher carbon levels.
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