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B8 Photosynthesis
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What is the word equation for Photosynthesis?
carbon dioxide + water —> glucose + oxygen
Where does the energy of photosynthesis come from?
From the sun, in the form of sunlight
In which organ does most photosynthesis take place?
Leaf
In which organelle does photosynthesis take place in?
Chloroplast
Which substance is responsible for absorbing light energy in photosynthesis?
Chlorophyll
How do plants get the carbon dioxide required for photosynthesis?
It diffuses from the air into the leaves, via stomata
How do plants get the water required for photosynthesis?
It is absorbed by root hair cells, via osmosis and transported by xylem vessels
Give 3 features of starch that make it a useful long-term storage molecule
It is insoluble in water
It is compact
It can be easily broken down when needed
Is photosynthesis endothermic or exothermic?
Endothermic
What is the symbol equation for photosynthesis?
6CO2+6H2O+Light Energy→C6H12O6+6O2
Give 5 ways plants can use the glucose they produce
Cellular respiration - break down glucose to release energy
Make Cellulose - needed for strong cell walls
Make Starch - which is used to store glucose for a long time
Make amino acids - which are used to make proteins
Make Lipids - these store energy as fats or oils, for later use
What are the 3 environmental factors that affect photosynthesis?
T