B8 Flashcards
what is the equation for photosynthesis
carbon dioxide+ water ——> glucose+oxygen
what is the symbol equation for photosynthesis?
6CO2+6H2O—->C6H12O6+6O2
what are leaf adaptations
-broad with big surface area for light to fall
-thin for short diffusion spaces
-chlorophyll in the chloroplasts to absorb light
-they have veins should bring water in the xylem and remove sugars in the phloem
-Air spaces that allow carbon dioxide to get to the cells and oxygen to leave by diffusion
-guard cells the open and close the stomata to regulate gas exchange
what is a limiting factor in photosynthesis?
-if one or more of these things (light, temp, co2) is in short supply it limits the amount of photosynthesis a plant carries out
what affects the rate of photosynthesis?
-light
-co2 conc.
-temp
-amount of chlorophyll
what is inverse square law
-light intensity (fish symbol) 1/distance^2
how do plants use glucose?
-cellulose and starch for storage
-proteins for growth and enzymes
-lipids for energy store
how do plants use glucose for cellulose and starch?
-cellulose is the buildup of glucose into complex carbohydrates
-glucose is soluble in water so would affect the way water moves in and out of the cell by osmosis. so instead is stored as starch.
-starch is an energy store when it gets dark
-starch is also the main energy store of the plant
how to plant use glucose for proteins for growth and enzymes
-they combine sugars with nitrate ions to form amino acids for protein synthesis
-it then uses the amino asses to build proteins which make new enzymes and build tissue
how to plant use glucose
to make lipids for energy store
-they store energy in their seeds which provides food for new plant to raspire as it germinates
is photosynthesis an exothermic reaction or an endothermic reaction?
endothermic
