How do cells store energy? Phosphate Adenosine Energy is released when this specific bond is broken* Phosphate Energy Adenosine what is the difference between ATP and ADP? which one is low energy? which one is high energy? like a bomb that can go off. that energy is used to do things in the cell. 3rd bond is very easy to break what can you use this energy for? energy released for cell funtions, etc. GIVE EXAMPLES!!!!!! Things that we talked about before!! Energy that comes from breaking down food is used to convert ADP into ATP Adenosine is a purine nucleoside comprising a molecule of adenine attached to a ribose sugar molecule

Cellular Energy is stored through ATP We need the energy that comes from breaking ATP into ADP in order for Our Hearts to beat Our brains to send messages to our bodies Our muscles to move ATP stands for Adenosine Triphosphate ATP transports chemical energy within cells for metabolism

ATP transfers energy from the breakdown of food molecules to cell functions The ATP Cycle phosphate removed draw on the board Where do molecules from food enter the cycle??

How do organisms break down sugars (food) to make ATP? Process called CELLULAR RESPIRATION Cellular Respiration is aerobic, or requires oxygen. Cellular Respiration take place in the mitochondria. mitochondrion animal cell Mitochondria are the power house of the cell. Where all the ATP is made. think of cellular respiration as the opposite of photosynthesis. Photosynthesis uses energy to make sugars. cellular respiration breaks down sugars to get energy.

Cellular Respiration Step 1: “Glycolysis” 6 Carbon Sugar Purpose: to split glucose into two three-carbon molecules Anaerobic process (does not require oxygen) Produces two ATP molecules Does not make that many ATP. cannot survive on glycolysis alone because it is too slow. we need oxygen. glycolysis purpose is to split glucose to smaller parts so its easier to handle. asymmetrical, atypical

Cellular Respiration Part 2: “Krebs Cycle” The Krebs cycle breaks down the three-carbon molecules from glycolysis. takes place in the mitochondrial matrix 6CO 2 mitochondrion matrix (area enclosed by inner membrane) ATP energy 1 4 3 and makes a small amount of ATP releases CO2 as waste transfers energy-carrying molecules to the next part of cellular respiration Update drawing Energy transferred to electron transport chain

Cellular Respiration Part 3: “Electron Transport Chain” (ETC) takes place in inner membrane of mitochondria energy from the Krebs cycle is transferred to ETC Oxygen enters process and water is released as waste product Up to 38 molecules of ATP produced for every one molecule of glucose! 6H O 2 6O mitochondrion Electron Transport Chain in the inner membrane 38 ATP! energy from Krebs Cycle 4 3 and electrons move from one protein to the next, towards oxygen at the end.

The overall equation for cellular respiration is: C6H12O6 + 6O2 -> 6CO2 + 6H2O Glucose + Oxygen -> Carbon Dioxide+ Water 6H O 2 6CO 6O mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy 1 4 3 and Krebs Cycle Glycolysis C6H12O6 arrows = many steps

Cellular Respiration Diagram 6H O 2 6CO 6O mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy 1 4 3 Cellular Respiration Diagram 2 Three Carbon Molecules 38

How are photosynthesis and cellular respiration different? Think. Pair. Share. Name three similarities and three differences Copy down the venn diagram from the board