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Lecture 5
Light and Light Capture
| Question | Answer |
|---|---|
| what is critical for photosynthesis to proceed? | light |
| availability of light decreases exponentially with what? | depth in the ocean |
| top layer of ocean water: photosynthesis and vision | euphotic zone |
| middle layer of ocean water: vision only (not enough sunlight for photosynthesis) | disphotic zone |
| no sunlight | aphotic zone |
| what color light penetrates deep? | blue |
| what color light is attenuated quickly? | red |
| PAR | photosynthetically available radioation |
| the process by which carbohydrates are synthesized from carbon dioxide and water using light as an energy source is called? | photosynthesis |
| the synthesis of organic materials from inorganic substances by photosynthesis or chemosynthesis is called? | primary production |
| in photosynthesis: water and carbon dioxide produce... | glucose and oxygen |
| where does photosynthetic reactions occur in photosynthetic cells? | chloroplasts |
| light dependent reactions occur in the... | thylakoid |
| light independent reactions occur in the... | stroma |
| photosynthetic organisms use what to capture light of various colors? | pigments |
| what type of chlorophyll is the main light harvesting pigment in most photosynthetic organisms (including all phytoplankton)? | chlorophyll a |
| helping chlorophylls are a group of ____ pigments... | accessory |
| what are a group of accessory pigments? | carotenoids |
| each pigment contains a group of atoms that can absorb ____ of different energies, which correspond to different colors of light. | photons |