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Basic Process of Photosynthesis: SunLIGHTSunLIGHT.

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Presentation on theme: "Basic Process of Photosynthesis: SunLIGHTSunLIGHT."— Presentation transcript:

1 Basic Process of Photosynthesis: SunLIGHTSunLIGHT

2 H2OH2O CO 2 Light Dependent Reactions Calvin Cycle O2O2 Sugars CHRLORPLAST SunLIGHTSunLIGHT

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4 Chemical Pathways Living things get the energy they need from food Both plant & animal cells carry out final stages of cellular respiration

5 …Remember ATP? ATP stores energy for cell activities like active transport & movement within the cell

6 EQUATION FOR CELLULAR RESPIRATION

7 EQUATION FOR CELLULAR RESPIRATION

8 Cellular Respiration… Process that releases energy by breaking down glucose & other food molecules in the presence of oxygen Three Stages: 1.Glycolysis 2.Krebs Cycle 3.Electron Transport Chain

9 GLYCOLYSIS Breaks down Glucose (6-carbon sugar) into 2 molecules of Pyruvic Acid (3-carbon compound) The products are: –2 Pyruvic Acid molecules –2 ATP molecules –2 NADH molecules

10 Glycolysis has 2 pathways… 1.If Oxygen is present (Aerobic)...Krebs Cycle… then to Electron Transport Chain 2.If Oxygen is absent (Anaerobic) … Fermentation… (directly to Electron Transport Chain)

11 FERMENTATION (Aanerobic Pathway) 2 TYPES: Alcoholic & Lactic Acid 1. Alcoholic : Yeast & other microorganisms use this to produce alcohol & CO2 as wastes. Beer is a beverage made by alcoholic fermentation

12 2.Lactic Acid: –Exercise causes the body needs more oxygen for respiration to make more ATP –Body resorts to lactic acid fermentation to make ATP –Lactic Acid is also produced causing burning sensation in muscles FERMENTATION (Aanerobic Pathway)

13 Glycolysis has 2 pathways… 1.If Oxygen is present (Aerobic)...Krebs Cycle… then to Electron Transport Chain 2.If Oxygen is absent (Anaerobic) … Fermentation… (directly to Electron Transport Chain)

14 KREBS CYCLE (Aerobic Pathway) Pyruvic Acid is broken down into CO 2 in a series of energy extracting reactions Hans Kreb: SEE P.226 Discovered citric acid cycle, Krebs Cycle

15 ELECTRON TRANSPORT CHAIN Uses high energy electrons from the Krebs Cycle to convert ADP to ATP!!! O 2 is the final electron acceptor in the electron transport chain

16 Cellular Respiration… Process that releases energy by breaking down glucose & other food molecules in the presence of oxygen Glycolysis sets the stage for Cellular Respiration Two Stages: 1.Krebs Cycle 2.Electron Transport Chain

17 Cellular Respiration Mini-Lab Clear your desk (except for pencil or pen) Write the title above on notebook paper Complete the Mini-lab (procedures & observations) Answer the questions on both sides Turn-in work to class basket when you finish (we will discuss it in class) You Have 15 min.!!!


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