Photosynthesis Flashcards
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Where does photosynthesis take place?
in the leaf
- chloroplasts
What is chlorophyll for?
to absorb light
photosynthesis symbol equation
6CO2 + 6H2O —–> C6H12O6 + 6O2
What type of reaction is photosynthesis
endothermic
How are the reactants retained?
- CO2 from stomata
- H2O by roots from xylem
What are the 5 things glucose is used for?
- Respiration
- Making cellulose
- Making amino acids
- Stored as oils or fats
- Stored as starch
Respiration glucose use
Transfers energy enabling the plant to convert the glucose into various other useful substances
Cellulose
glucose is converted into complex carbohydrates to make strong plant cell walls
Storing of starch
A complex carbohydrate that is used for long term storage in roots, stems and leaves when photosynthesis isnt happening
- compact
- insoluble (wont draw water into cell)
Making amino acids
Glucose combines with nitrate ions (absorbed from soil) to make amino acids
- then made into proteins
Stored as oils or fat
Glucose turned into lipids for storing in seeds
What does a plant growth rate rely on?
How fast the plant photosynthesise
What are the 4 factors that affect the rate of photothyseis
- Light intensity
- CO2 concentration
- Amount of chlorophyll
- Temperature
Chlorophyll as a limiting factor
Need it as it absorbs light
- diseases (tobacco mosaic virus)
- environmental stress
- lack of nutrients
