Cellular Respiration and Photosynthesis
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Cellular Respiration and Photosynthesis

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A narrated power-point presentation that describes the processes of Cellular Respiration and Photosynthesis

A narrated power-point presentation that describes the processes of Cellular Respiration and Photosynthesis

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Cellular Respiration and Photosynthesis Cellular Respiration and Photosynthesis Presentation Transcript

  • Cellular Respiration and Photosynthesis Maggie Schroeder, Megan Wright, and Wendy Combs Narrated by Maggie Schroeder
  • Cell Respiration… By Maggie Schroeder … with help from Megan Wright, Wendy Combs, and Mr. Olsen  Krebs-Cycle-ation, Transportation, Phosphorylation, Don’t be hatin’ in the ATP NATION!
  • Bare Necessities
    • Every living cell needs to convert chemical energy into mechanical energy
    • Needed for:
        • Synthesizing large molecules (DNA, RNA, etc.)
        • Active Transport
        • Moving particles within the cell (chromosomes, vesicles, muscle cell fibers)
    • Energy in the form of ATP
    • “ The controlled release of energy from organic compounds to form ATP” ~ Bio Course Companion
    View slide
  • ATP… LOL ROFLMAO
    • Adenosine Triphosphate
    • Convert to ADP
      • Split off a phosphate molecule, releases energy
    • Must be produced by cell
    • Drive most cellular work
    • In addition to ATP, cellular respiration produces Carbon Dioxide and water
    View slide
  • Cell Wars: The Saga Begins
    • Glycolysis breaks down glucose into two pyruvates
      • Net yield of 2 ATP
      • 2 NADH and 2 Hydrogen Ions (H+)
    • Glycolysis occurs in prokaryotic and eukaryotic cells
    • Anaerobic vs. Aerobic Respiration
      • Lactate/Alcohol
  • Glycosis
  • The Ciiiiircle of Krebs!
    • The Krebs Cycle
    • Numerous Chemical Conversions
      • Acetyl CoA
      • Removes CO2 Molecules
      • Produces NADH
      • Produces ATP
      • Produces FADH2
    • Resulting molecule is sent to Electron Transport chain
  • The Krebs Cycle
  • Do Yo’ Chain Hang Low?
    • Electron Transport chain
      • Electrons from NADH and FADH
        • Electron Carriers transport within the Inner-Mitochondrial Membrance
        • Then combine with 2H+ molecules and .5 O2 molecules
      • Proteins force H+ molecules against a gradient into the inter-membrane space
  • Chemiosmosis (can’t really make anything catchy outta that)
    • The H+ molecules go back into the matrix (with concentration gradient)
      • ATP Synthase
    • Flow of H+ molecules causes ATP Synthase to convert ADP to ATP
    • Electron Transport Chain + Chemiosmosis = OXIDATIVE PHOSPORYLATION!! 
  • Oxidative Phosphorylation
  • Photosynthesis
    • By Megan Wright
  • What is Photosynthesis?
    • A production of organic compounds
      • Carbohydrates
      • Proteins
      • Lipids
    • Uses light energy and inorganic substances
      • Carbon dioxide
      • Water
    • The first organisms to perform photosynthesis were prokaryotes
    • Photosynthesis led to a rise in oxygen concentration in the atmosphere
  • Light and Photosynthesis
    • Conversion of light energy into chemical energy
    • Sunlight is composed of a range of wavelengths (colors)
    • Light-dependent and light-independent reactions
    • Light energy used to produce ATP
      • also to split water molecules (photolysis) to form oxygen and hydrogen
  • Light and Photosynthesis
    • Light absorption
    • Involves pigments
      • Pigments: Look colored to the human eyes and therefore are visible
      • The main pigment in photosynthesis is chlorophyll.
    • The rate of photosynthesis affected by light intensity
  • Light and Photosynthesis
    • The rate of photosynthesis increases with light intensity while low
      • At higher intensities, little effect
    • Chlorophyll absorbs light energy and:
      • ATP is produced
      • Hydrogen is made
        • Hydrogen is used in a different stage of photosynthesis
    • Releases oxygen
  • Photosynthesis and Carbon Dioxide
    • Carbon dioxide provides carbon for making organic molecules
    • Carbon fixation : carbon transformed into solid or liquid compounds
    • ATP also needed
    • Therefore light intensity affects the carbon fixation
      • Darkness can stop it
      • Low light can slow it down
  • Action/Absorption Spectrum and Photosynthesis
    • Chloroplasts w/ different types of chlorophyll.
      • Each have light-absorbing qualities with minor differences
      • All absorb red and blue light.
    • Accessory pigments: absorb wavelengths and then convert the light energy to chlorophyll
    • Green light has a lower rate of photosynthesis.
  • Rates of Photosynthesis
    • Measuring Photosynthesis:
      • Directly vs. Indirectly
    • i.e. When the carbon dioxide concentration is low and increases, then photosynthesis’ rate decreases
    • i.e. The faster the rate of photosynthesis, the more oxygen there is
    • i.e. Increase in biomass = increase in photosynthesis
  • Photosynthesis and ATP
    • Photophosphorylation – production of ATP using light energy.
      • Carried out in thylakoids.
    • Thylakoid membranes:
      • Photosystem I - Electron Chain
      • Photosystem II - ATP Synthase
    • Chemiososis
    • ATP and hydrogen used to make organic molecules .