Term
| How does photosynthesis work? |
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Definition
| captures energy from the sun and converts it into usable energy |
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Term
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Definition
| when electrons move up to a higher energy level |
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Term
| What are the two components of photosynthesis? |
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Definition
- Light dependant reactions
- Light independant reactions
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Term
| What are photosystems made up of? |
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Definition
- Antenna Complex - accessory pigments - phycopigments, carotenoids, chlorophyll B
- Reaction Center - Chlorophyll A
[image] |
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Term
| Where do light dependant reactions occur |
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Definition
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Term
| What is the difference between photosystem I and photosystem II? |
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Definition
- Photosystem I - creates ATP
- Photosystem II - crates NADH+H+
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Term
| What are the three steps of the Calvin cycle? |
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Definition
- Carbon Fixation
- Reduction of Diphosphoglycerate
- Regeneration of RuBp
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Term
| When does photosynthesis occur? |
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Definition
During the day when sunlight is avalible, however not immediatly after sunrise because the plant needs to rebuild its ATP and NADH+H+ stores |
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Term
| What are the three pathways for Glucose after it is synthesized in plants |
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Definition
- Converted to starch (storage)
- Converted to sucrose (transportation)
- Converted to cellulose (cell wall construction)
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Term
| How does light intensity influence photosynthesis rates? |
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Definition
As light intensity increases CO2 uptake also increase up to the light stauration point which occurs when the enzymes involved in photosynthesis are working at full capacity
[image] |
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Term
| How does light quality influence photosynthesis rates? |
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Definition
The rates of photosynthesis are best at blue (400nm) and red (720nm) wave lenghts
[image] |
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Term
| How does temperature influence photosynthesis rates? |
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Definition
| Photosynthesis rates increase between 10oC and 30oC but begins to decrease after 40oC[image] |
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Term
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Definition
| The process of photoexciting an electron by breaking down a water molecule into 2H+ and 1/2 O |
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Term
| What is the result of light dependant reactions? |
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Definition
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Term
| Where do light independant reactions occur? |
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Definition
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Term
| When does photorespitation occur |
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Definition
| Photorespiration occurs when there are high levels of oxygen which cause RuBp to favour the oxygenase reaction rather than the carboxylase reaction |
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Term
| What environmental factors encite photorespiration? |
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Definition
| High temperatures (+30oC) or high light intensities |
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Term
| What is C4 photosynthesis |
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Definition
| a response some plants (corn, sugar cane) have to prevent photo-resp. by creating oxaloacetate in the vascular bundles abolishing any oxygenase aspect |
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Term
| What is CAM photosynthesis |
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Definition
| a response that some plants (cacti, pineapples, aloe vera) to photo-resp involving the stromata of the plant only opening at night retaining more CO2 |
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