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8 Cards in this Set
- Front
- Back
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What did Englemann do in relation to photosynthesis? |
He devised an experiment to determine which wavelengths of light were the most effective in carrying out photosynthesis (using filamentous green alga). |
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How did Englemann find out which wavelengths of light were the most effective for photosynthesis? |
Filamentous green alga - each cell of which contains ribbon-like chloroplast shaped in the form of a spiral. He placed the algae in a suspension or aerobic bacteria, and exposed the algal cells to a range of wavelengths. |
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What are the most effective wavelengths of light for photosynthesis, and how did Englemann find this out? |
He noticed that the bacteria clustered near to the chloroplasts at the blue and red wavelengths. This was because these wavelengths resulted in increased photosynthesis, which produced more oxygen and so attracted more of the aerobic bacteria. |
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Where does the light-dependent stage of photosynthesis take place? |
Grana (in thylakoids) |
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Where does the light-independent stage of photosynthesis take place? |
Stroma |
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What are the who main photosynthetic pigments and there sub groups? |
Chlorophylls and Carotenoids (Carotene & Xanthophyll). |
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What wavelengths of light do chlorophyll absorb? |
Light energy mainly in the red and blue-violet regions of the spectrum. |
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What wavelengths of light do carotenoids absorb? |
Light energy mainly from the blue-violet region of the spectrum. |
