Bio 201 1st Edition Lecture 24 Outline of Last Lecture I. Aerobic MetabolismA. Metabolic Pathway RegulationII. PhotosynthesisA. ChloroplastsB. Light-dependent ReactionsC. Light-independent Reaction (Calvin cycle) Outline of Current LectureI. Non-Cyclic Electron TransportII. Cyclic Electron TransportA. The Calvin CycleCurrent LectureI. Non-Cyclic Electron Transport- Sun reaction center (P680) electron transportlumen P700ATP synthase-Photoautotophs- use energy from the sun-NADP+ is final electron acceptor and ATP is a product-Photophosphorylation- ADP+ P1 ATP (in P680)-The Hill Reaction- 2H2O O2 + 4H+-Problem? This produces more NADPH compared to ATP to fuel production of glucose from CO2. NADPH is wasted.-Solution? These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.II. Cyclic Electron Transport- Allows ATP to be produced through photosystem I, bypassing photosystem II. In order to make this ATP, electrons must go through the ETS.A. The Calvin Cycle- Takes place in the chloroplast stroma. Makes sugars from CO2 using chemical energy from ATP and NADPH. 3 processes occur;1. Carbon Fixation- CO2 comes thru the chloroplast 5C sugar, RuBP.-This process is catalyzed by the enzyme rubisco, the most abundant protein on Earth. -CO2 binds to RuBP and the resulting 6C sugar is immediately converted to 2 moleculesof 3PG (3C)-6RuBP+ 6CO2 12 3GP2. Reduction and Sugar Production- 12 3GP+ ATP + NADPH 12 3P3. Regeneration- 10 G3P+ 6 RuMP
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