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FROM
AIR---Go in
stomata
FROM
SOIL
GLUCOSE—(C6H12O6)
FOOD FOR PLANT AND
CONSUMERS—Stored in
plant !
What is Photosynthesis?
•Photosynthesis is the process by which plants, some
bacteria, and some protists use the energy from sunlight
to produce sugar(glucose), which cellular respiration
converts into ATP, the "fuel" used by all living things.
• The conversion of unusable sunlight energy into usable
chemical energy, is associated with the actions of the
green pigment chlorophyll contained in the chloroplasts.
Chlorophyll reflects which color???
•Most of the time, the photosynthetic process uses water
and CO2 and releases the oxygen that we absolutely must
have to stay alive.
•Oh yes, we need the food(glucose) as well!
•We can write the overall reaction of photosynthesis as:
•H2O + CO2
Sunlight
C
H
O
+
O
6
12
6
2
Chlorophyll
•The balanced equation is:
•6H2O + 6CO2
C6H12O6+ 6O2
•The above chemical equation translates as:
six molecules of water plus six molecules of carbon dioxide
produce one molecule of glucose plus six molecules of
oxygen
CHLOROPLAST
LIGHT
DEPENDENT
REACTION
LIGHT
INDEPENDENT
REACTION
OR
CALVIN CYCLE
GLUCOSE
C6H12O6
Pea Leaf Stoma, Vicea sp. (SEM x3,520).