Energy in a Cell All Cells Need Energy  Cells need energy to: –Make new molecules. –Build membranes and organelles. –Move molecules in and out of the

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  • Energy in a Cell

  • All Cells Need EnergyCells need energy to:Make new molecules.Build membranes and organelles.Move molecules in and out of the cell.Move.

  • Autotrophs (producers)Organisms that make their own food Use light energy from the sun to make food

    Example: PLANTS

  • Heterotrophs (consumers)Organisms that get energy from the foods they eat Example: ANIMALS

  • NOT a flashcard.

  • Where Does A Cell Get Energy? Food is broken down to a form the cell can use.

    Extra energy is stored in an ATP molecule.

  • ATPAdenosine triphosphate is a molecule made up ofadenineribose3 phosphate groups.

    AdenineRibose(ENERGY STORED HERE!)

  • ADPAdenosine diphosphate. Made up ofadenineribose2 phosphate groups.AdenineRibose

  • How Does ATP Work?Energy is stored in the bond between the second and third phosphate group.

    When the bond is broken, energy is released and ADP is formed. AdenineRibose

  • Storing EnergyEnergy is stored by the cell when 1 phosphate is added to the end of an ADP molecule forming ATP.

  • 2 Ways to make ENERGY!

    1. Photosynthesis takes place in the chloroplasts.2. Cellular Respiration takes place in the mitochondria.

  • PhotosynthesisAutotrophs make their own food by trapping light energy and converting it to carbohydrates.


    6CO2 + 6H2O + sunlight C6H12O6 + 6O2

  • Plants produce O2 gas by splitting waterThe O2 released by photosynthesis is made from the oxygen in water.

    6CO2 + 6H2O + sunlight C6H12O6 + 6O2NOT a flashcard.

  • Cellular RespirationThe process of breaking down food molecules to release energy.Occurs in the mitochondria.Equation:C6H12O6 + 6O2 6CO2 + 6H2O + ENERGY

  • Compare The Equations!Photosynthesis:

    Cellular Respiration:6CO2 + 6H2O + sunlight C6H12O6 + 6O2C6H12O6 + 6O2 6CO2 + 6H2O + ENERGYNOT a flashcard.

  • Two Types of RespirationAerobic Respiration requires oxygen.

    Anaerobic Respiration requires an absence of oxygen.

  • The EndAny questions?

  • Anaerobic RespirationTwo types:Fermentation occurs when bacteria break down plants (vegetables and fruit) and release alcohol or vinegar.

    Lactic Acid Fermentation occurs in muscles a buildup of lactic acid causes soreness.

  • SunlightPhoto-SystemIPhoto-systemIINADP+ADPNADPHATP




    NOT a flashcard.

  • ChemosynthesisSome autotrophs can convert inorganic substances to energy.Most are adapted to live in conditions where there is no oxygen.Digestive tracts of mammalsLake sedimentsMarshesDeep in the ocean

  • NOT a flashcard.

  • The EndAny questions?

  • Photosynthesis in a picture!NOT a flashcard.


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