Energy Metabolism: Photosynthesis (Reducing Power (Reduced Compound,…
Energy Metabolism: Photosynthesis
photoautotrophs- convert light to inorganic materials.
entropy- becoming less organized.
heterotrophs- take in organic materials.
oxidized-not maxed out with electrons.
reduced- atom gains electrons
reduction reaction-reduces positive charge
oxidation reaction- increases positive charge
Reducing Power- force electrons onto compounds
Oxidizing Agents- take away electrons
Reducing Agent- accept electrons
Light Dependent Reactions
Electromagnetic Radiation Spectrum
Quanta and photons
Pigments- absorb wavelengths of light to determine color
Ground State----Excited State
Fluoroscence-pigment releases light
Action Spectrum-tells which wavelengths are best suited for a photochemical process.
Accessory Pigments- strongly absorb wavelengths
Resonance- allows chlorophyll b to absorb light chlorophyll a misses
Antenna Complex-300 chlorophyll, carotenoids, and proteins
Reaction Center- where energy is transferred
ferredoxin- NADP reductase
cytochrome b6/f complex
Electron Transport Chain
Calvin Cycle/C three cycle
acceptor molecule-reacts with carbon dioxide
3 Phosphoglycerate- 3 carbons
RuBP carboxylase- giant enzyme
anabolism- consist of anabolic reactions
Synthesis of Polysaccharides
Quality of Sunlight- colors or wavelengths
Quantity of Light- intensity or brightness
Light can damage the plant if it is too intense.
Light compensation point- no photosynthesis occurred
Duration of Sunlight- number of hours per day of sunlight
Moist climates- thick mesophyll for storing carbon dioxide
Dry places- small growth to conserve water
Greatly influences photosynthesis
C4 Metabolism- evolved efficient method
PEP carboxylase- enzyme found in the mesophyll
Crassulacean Acid Metabolism- second metabolic improvement
Oxygenic Photosynthesis-Oxygen is a waste product
bacteriochlorophylls- purple and green bacteria
anoxygenic photosynthesis-no oxygen and relies on the chemiosmotic gradient