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Energy in a Cell PART2

chloroplast. mitochondria. ATP. Energy in a Cell PART2. water. CO2. glucose. sun. Predict:. Why do we breathe?! Why do we eat what plants produce?. Heterotrophs. AKA consumers Eat autotrophs = starch enters their food chain.

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Energy in a Cell PART2

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  1. chloroplast mitochondria ATP Energy in a CellPART2 water CO2 glucose sun

  2. Predict: • Why do we breathe?! • Why do we eat what plants produce?

  3. Heterotrophs • AKA consumers • Eat autotrophs = starch enters their food chain. • They must eat (consume) to produce energy molecules during the process of cellular respiration

  4. Different Pathways There are two main pathways to release energy from glucose The amount of oxygen available controls the pathway Aerobic Respiration(with oxygen) = Cellular Respiration Anaerobic Respiration(without oxygen) = Fermentation

  5. Picture of Pathway Glycolysis Aerobic Respiration Anaerobic Respiration Lots of Oxygen Not enough Oxygen Cellular Respiration Alcoholic Fermentation Lactic Acid Fermentation Net 36 ATP Net 2 ATP

  6. Turn to a shoulder partner and use the diagram in your notes to complete the following sentence stem: One difference between the two possible pathways for cellular respiration is …

  7. What is Cellular Respiration? • Process of converting chemical energy of food molecules (in the presence of oxygen) into chemical energy storage molecules of ATP

  8. Cellular Respiration Using Oxygen to break apart food molecules (sugars) Takes place in the mitochondria Produces lots of ATP and releases CO2 and H2O as byproducts Muscles will do this as long as they don’t run out of oxygen Cellular Respiration C6H12O6 + 6O2 -------- 6H2O + 6CO2 + ATP

  9. Cell Respiration • 6 O2 + C6H12O6 --> 6 CO2 + 6 H20 • 6 oxygen molecules+ 6 glucose molecules react to produce 6 carbon dioxide molecules + 6 water molecules reactant product

  10. Mitochondria • All eukaryotes (including autotrophs) have mitochondria. • Cellular respiration occurs in the mitochondria of the cell. • Bacteria do not have mitochondria, but they have the ability to break down sugars in their cytoplasm.

  11. 3 Stages of Cellular Respiration = 2 = 2 = 32 Glycolysis (Anaerobic) 2ATP molecules Krebs Cycle (Aerobic) 2ATP molecules Electron Transport Chain (Aerobic) 32 ATP molecules Each stage captures some of the chemical energy available in food molecules and uses it to produce ATP

  12. What does all this mean? • Glucose is produced by converting the suns energy • Glucose is transported into the cells (active transport) • Glucose is broken down by hydrolysis = GLYCOLYSIS *A new molecule is produced =ATP * The 2 molecules from glycolysis go to the mitochondria • More energy is made = Krebs cycle • Finally, ATP is produced in the highest amount in the membrane of the mitochondria = Electron transport chain • Result = ATP, H2O, CO2

  13. What exactly is ATP? • Cellular respiration is the primary way of making ATP molecules from simple sugars. • How are simple sugars made?

  14. What exactly is ATP? • Adenosine triphosphate • the energy storage molecule 3 Phosphates Adenosine Energy storage

  15. Getting energy out of ATP Adenosine ATP Bond is broken releasing energy and a phosphate group forming ADP Phosphate group is bonded to ADP molecule storing energy in ATP ENERGY RELEASED! Phosphate ADP

  16. Photosynthesis vs. Respiration Photosynthesis and cellular respiration take place in opposite directions! Photosynthesis: Use light energy to build a sugar. carbon dioxide + water + light energy → sugars + oxygen Respiration: Break down sugar to release energy. oxygen + sugars → carbon dioxide + water + energy

  17. SO, what process(es) do plants do?!!

  18. Card Sort • With your partner, match the cards to the proper word(s)! • Raise your hand to be checked.

  19. Exit Ticket: With sufficient sunlight, is it possible to suffocate a plant? Explain!

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