summary of photosynthesis
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Summary of Photosynthesis
• By Anando Neethling
WHAT IS PHOTOSYNTHESIS?
The process that occurs in green plants, whereby solar energy is converted into chemical energy and stored as organic molecules by making use of carbon dioxide, sunlight, and water. Water and Oxygen are formed as byproducts.
Photosynthesis can be summarized in the following equation:
6 CO2 + 12 H2O + Light energy
C6H12O6 + 6 O2 + 6 H2O
(glucose)
WHO OR WHAT CAN PHOTOSYNTHESIZE? Photoautotrophs can
photosynthesize. Include: Green plants, algae,
cyanobacteria and green protists.Plants
Green protistsAlgae
WHY DO PLANTS PHOTOSYNTHESIZE? To provide nutrients and oxygen for
heterotrophs. Heterotrophs are dependent on
autotrophs, because they cannot produce there own food.
WHAT PART OF THE PLANT IS RESPONSIBLE FOR PHOTOSYNTHESIS? Photosynthesis occurs in the chloroplasts
of plant cells. The chloroplasts are mainly concentrated
in the mesophyll cells of leaves. Chloroplast contain chlorophyll – green
pigment that absorbs sunlight. Chlorophyll fill the space in the thylakoid
membrane.
CHLOROPLAST
MESOPHYLL CELL (PALLISADE AND
SPONGY)
1 µm
Thylakoidspace
Chloroplast
GranumIntermembranespace
Innermembrane
Outermembrane
Stroma
Thylakoid
The Importance of Photosynthesis Energy entering chloroplasts as sunlight gets stored as
chemical energy in organic compounds
Sugar made in the chloroplasts supplies chemical energy and carbon skeletons to synthesize the organic molecules of cells.
Plants store excess sugar as starch in structures such as roots, tubers, seeds, and fruits
In addition to food production, photosynthesis produces the O2 in our atmosphere
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