Cellular Energetics. Photosynthesis. Photosynthesis. Photosynthesis. Photosynthesis. Photosynthesis. Photosynthesis, Respiration, Fermentation

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1 Cellular Energetics,, Defition = process by which plants make their own food Requires light ultraviolet Where does it take place? chloroplast What pigment makes it possible? chlorophyll What types of organisms can perform photosynthesis? some bacteria plant-like like protists (algae) plants What are the reagents? 1. CO 2 (carbon dioxide) 2. H 2 O (water) 3. Uv light (sunlight) What are the products? 1. C 6 H 12 O 6 (Glucose) (Carbohydrate) (Sugar) 2. O 2 (oxygen) 1

2 How what is the balanced equation? CO 2 + H 2 O + uv light 6 CO H 2 O + O + uv light C 6 H 12 O 6 + O 2 C 6 H 12 O O 2 Why do Plants look green? Pigment = chlorophyll Chlorophyll absorbs all visible wavelengths (ROYGBV) EXCEPT: green Green is reflected plants look green Two parts of : 1. Light Dependent reactions ( cludes Calv Cycle) 2. Light Independent reactions 1. Light Dependent reactions ENERGY- Contag compounds formed Light energy absorbed Electron Transport Cha 1. Light Dependent reactions Electrons passed from chlorophyll to an electron transport cha 2

3 1. Light Dependent reactions ATP & NADPH are formed (both conta energy) 2. Light Independent reactions GLUCOSE FORMED (food made) Carbon fixed from CO 2 NOTE: Both Light dependent AND light dependent rxns needed for photosynthesis!!! Animation images.google.com/imgres?imgurl= mbio/photosynthesis/photosynthesis%25 20animation%2520gif.gif&imgrefurl= / photosynthesis/photosynthsis%2520anim ation.htm&h=527&w=767&sz=420&hl Cellular Animation JtA&feature=related Cellular Where? In the ner membranes of mitochondria Cellular Purpose? To break down food () to produce ATP (source of energy) (reverse of photosynthesis) 3

4 Cellular Three stages 1. Glycolysis Electron Transport Cha Cellular Glycolysis Six- carbon sugar () --- two three- carbon sugars (pyruvate) The three-carbon sugar (pyruvate) goes through the citric acid cycle to yield NADH (energy storage molecule) and carbon dioxide Electron Transport Cha Electrons stored NADH are sent through the electron transport cha which allows the synthesis of ATP Products are: ATP and Water ATP (BIG ENERGY) 6 O 2 + C 6 H 12 O (oxygen) () 6 CO H 2 O (carbon dioxide) (water) 4

5 Comparison of vs Comparison of vs Comparison of vs Comparison of vs 3. Carbon dioxide taken Carbon dioxide given off Oxygen taken Produces Oxygen taken Produces CO 2 + H 2 O 5

6 Produces Only daylight Oxygen taken Produces CO 2 + H 2 O Day and night Produces Only daylight Plants Only Oxygen taken Produces CO 2 + H 2 O Day and night Occurs all livg cells = PBW (process by which) sugars are broken down by bacteria and/ or yeast usg aerobic or anaerobic respiration Aerobic =? the presence of oxygen Anaerobic =? without the presence of oxygen Is the respiration we talked about aerobic or anaerobic? aerobic Usg yeast, alcohol is produced from sugar ethanol + carbon dioxide C 6 H 12 O 6 2 C 2 H 5 OH + CO 2 used to make: 1. bread 2. root beer, beer & we 3. cheese yogurt soy sauce 6

7 CO 2 causes the bread to rise CO 2 causes the bubbles root beer & champagne causes food to spoil Animation rbufg Makg gger ale VAdYk Bibliography GG/ecb/ecb_images/13_03_glycolysis.jp g icillium-on on-food.jpg 7

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