Lecture 23

Lecture 23 - The incorporation of carbon into an organic...

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Unformatted text preview: The incorporation of carbon into an organic compound is called: 1.  2.  3.  4.  Photophosphorylation Fixation Photorespiration Reduction BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Clicker Question! Photosynthesis Chapter 10 1 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Photosynthesis How is ATP made during the light reactions? Chemiosmosis Photophosphorylation 2 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Chemiosmosis Comparison Oxidative Phosphorylation Photophosphorylation Chemiosmosis Comparison Oxidative Phosphorylation Photophosphorylation 3 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Chemiosmosis Comparison Oxidative Phosphorylation Photophosphorylation Chemiosmosis Comparison Oxidative Phosphorylation Photophosphorylation PMF 4 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Chemiosmosis Comparison Oxidative Phosphorylation Photophosphorylation Electrons: Glucose NADH E TC Chemiosmosis Comparison Oxidative Phosphorylation Photophosphorylation Electrons: Glucose Electrons: Water NADH PSI E TC ETC 5 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Light Reactions Thylakoids Light Reactions Electrons from water excited by light 6 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Light Reactions ETC builds H+ gradient Light Reactions PMF powers ATP synthase 7 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Light Reactions Electrons from PSI excited again Light Reactions Electrons power NADP+ reductase 8 FALL 2011 Light Reactions BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi Products: ATP, NADPH Clicker Question! Carbon fixation occurs during the “dark reactions,” or the: 1.  2.  3.  4.  Calvin Cycle Luther Cycle Citric Acid Cycle Cyclic Electron Flow Pathway 9 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 The Dark Reactions Calvin Cycle Carbon Fixation: CO2 (gas) G3P (solid) 10 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Calvin Cycle Calvin Cycle Three main stages: 1. Carbon Fixation 2. Reduction 3. Regeneration of RuBP 11 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Calvin Cycle 1. Carbon Fixation • CO2 (1C) added to RuBP (5C) by RUBISCO • Yields 2X 3C molecules Calvin Cycle 2. Reduction • 3C molecules modified (reduced) to form 3C sugars, G3P ATP NADPH 12 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Calvin Cycle 3. Regeneration • 5X G3P are recycled into 3X RuBP ATP Calvin Cycle Summary • 3X CO2 enter 13 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Calvin Cycle Summary • 3X CO2 enter • 6X G3P produced Calvin Cycle Summary • 3X CO2 enter • 6X G3P produced • 1X G3P exported 14 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Calvin Cycle Summary • 3X CO2 enter • 6X G3P produced • 1X G3P exported • 5X G3P recycled Calvin Cycle 3 CO2 + 9 ATP + 6 NADPH + 3 RuBP (5C) 1 glyceraldehyde 3-phosphate (3C) + 9 ADP + 6 NADP+ 9 pi + 3 RuBP (5C) 15 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Glucose Synthesis So, where DOES glucose come from? Glucose Synthesis Respiration Photosynthesis Glucose Glucose-6-phosphate Fructuse-6-phosphate Fructose-1,6-bisphosphate 2 Glyceraldehyde-3-phosphate 16 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Glucose Synthesis Respiration Photosynthesis Glucose Glucose-6-phosphate Fructuse-6-phosphate Fructose-1,6-bisphosphate 2 Glyceraldehyde-3-phosphate Glucose Synthesis Respiration Photosynthesis Glucose Glucose-6-phosphate Fructuse-6-phosphate Starch (Stroma) Sucrose (Cytosol) Fructose-1,6-bisphosphate 2 Glyceraldehyde-3-phosphate 17 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Glyceraldehyde-3-phosphate An Anabolic Keystone G3P from photosynthesis used for: • Sucrose • Starch • Cellulose • Fatty acids, glycerol, oils • Amino acids Quiz Question 1 Which one of the following properties is found in reactions with a NEGATIVE delt G? 1.  2.  3.  4.  Increased free energy in products They require energy input They are spontaneous They are endothermic 18 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Quiz Question 2 Which of the following processes occurs entirely in the cytoplasm? 1.  2.  3.  4.  Glycolysis Transition step Kreb’s Cycle Chemiosmosis Quiz Question 3 When Complex I transfers electrons to Ubiquinone in the mitochondrial ETC, Ubiquinone is: 1.  2.  3.  4.  Polymerized Degraded Oxidized Reduced 19 BSCI105ples of Biology I Princi FALL 2011 BSCI105ples of Biology I Princi FALL 2011 Quiz Question 4 The inhibition of phosphofructokinase by ATP is an example of: 1.  2.  3.  4.  Positive feedback Competitive inhibition Allosteric regulation Substrate level phosphorylation Quiz Question 4 The inhibition of phosphofructokinase by ATP is an example of: 1.  2.  3.  4.  Positive feedback Competitive inhibition Allosteric regulation Substrate level phosphorylation 20 BSCI105ples of Biology I Princi FALL 2011 Quiz Question 5 The chloroplast synthesizes ATP by: 1.  2.  3.  4.  Substrate level phosphorylation Oxidative phosphorylation Photophosphorylation Photorespiration 21 ...
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This note was uploaded on 12/09/2011 for the course BSCI 105 taught by Professor Jensen during the Spring '07 term at Maryland.

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