Anabolic (small molecules combined)
Endergonic (stores energy)
Carbon dioxide (CO2) requiring process that uses light energy (photons) and water (H2O) to produce organic macromolecules (glucose).
6CO2 + 6H2O C6H12O6 + 6O2
Where does photosynthesis take place?
Autotrophs – produce their own food (glucose)
Process called photosynthesis
Mainly occurs in the leaves:
a. stoma - pores
b. mesophyll cells
Pores in a plant’s cuticle through which water vapor and gases (CO2 & O2) are exchanged between the plant and the atmosphere.
Found on the underside of leaves
Mesophyll Cell of Leaf
Photosynthesis occurs in these cells!
Organelle where photosynthesis takes place.
Thylakoid stacks are connected together
Grana make up the inner membrane
Why are plants green?
Located in the thylakoid membranes
Chlorophyll have Mg+ in the center
Chlorophyll pigments harvest energy (photons) by absorbing certain wavelengths (blue-420 nm and red-660 nm are most important)
Plants are green because the green wavelength is reflected, not absorbed.
Wavelength of Light (nm)
Absorption of Light by Chlorophyll
Chlorophyll absorbs blue-violet & red light best