Photosyntesis What is photosynthesis? The ability to use light to convert inorganic molecules into organic molecules. H 2 O + CO 2 ==== light == sugar + O 2 Sugar can then be used to make other required molecules, or it can be Broken down as a source of energy O 2 is simply a biproduct of photo- Synthesis almost all the O 2 in the earths atmosphere comes from phot Synthesis.
Photosyntesis Leaves and Chloroplasts are adaptations for photosynthesis.
Photosyntesis light and dark reactions Photosynthesis has two phases: A light dependent reaction where the energy in light is converted into chemical energy of molecules such as ATP and NADPH. A dark reaction where the molecular energy carriers are used to build the sugar molecules.
Photosyntesis Pigments The first step of photosynthesis involves using pigments to capture light. The range of visible light used for photosynthesis is from about 400 to 750 nanometer wavelengths of electromagnetic radiation this range is referred to as PAR Photosynthetically Active Radiation. Although chlorophyll is the primary pigment used by plants (its what makes plants green), other pigments such as carotenoids and phycocyanin are also used why do you think this is?
Photosyntesis Effects of varying light levels P: photosynthesis P max : maximum photosynthesis P g : gross photosynthesis P n : net photosynthesis R : respiration I K : saturating irradiance
Respiration H 2 O + CO 2 ==== light == glucose (sugar) + O 2 Photosynthesis: Complete glucose metabolism through cellular respiration: sugar + O 2 ====== H 2 O + CO 2 + chemical and heat energy