Photosynthesis and Limiting Factors Flashcards
what does photosynthesis do
uses energy to change carbon dioxide and water into glucose and oxygen
where does photosynthesis take place
it takes place in chloroplasts in green plant cells - they contain pigments like chlorophyll that absorb light
what type of reaction is photosynthesis
endothermic - meaning energy is transferred from the environment in the process.
what is the word equation for photosynthesis
carbon dioxide + water ——–} glucose + oxygen
what is the symbol equation for photosynthesis
6CO2 + 6H2O ——–} C6H12O6 + 6O2
what are the 5 main ways plants use glucose
1) for respiration
2) making cellulose
3) making amino acids
4) stored as oils or fats
5) stored as starch
how does respiration use glucose
respiration transfers energy from glucose which enables the plants to convert the rest of the glucose into various other useful substances
how does glucose make cellulose
glucose is converted into cellulose for making strong plant cell walls
how does glucose make amino acids
glucose is combined with nitrate ions to make amino acids, which are then made into proteins
how is glucose stored as oils or fats
glucose is turned into lipids for storing in seeds
how glucose stored as starch
glucose is turned into starch and stored in roots, stems and leaves, ready for use when photosynthesis is not happening, like in the winter. Starch is insoluble, which makes it much better for storing than glucose - a cell with lots of glucose in would draw in loads of water and swell up.
what are the main limiting factors of photosynthesis
light intensity, CO2 concentration, temperature and amount of chlorophyll
