P p photosynthesis
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Transcript of P p photosynthesis
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BioEnergeticsBioEnergeticsWhere Do Cells Get their Energy?Where Do Cells Get their Energy?
PhotosynthesisPhotosynthesis
RespirationRespiration
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Solar Energy
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Photosynthesis
Trapping the Sun’s Energy to convert H2O and
CO2 into oxygen and sugar is called glucose C6H12O6
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Glucose has
Chemical EnergyFor bonding
Potential Energy
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BothBoth
Heterotrophs and Heterotrophs and AutotrophsAutotrophs
Carry OutCarry Out
Cellular RespirationCellular Respiration
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Fungi
Protists
Animals
Plants Also
Bacteria
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Cellular Respiration
Releasing the energy by breaking down chemical bonds
(Energy is stored in glucose)
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ATP
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ATPATP
Basic Energy Source Basic Energy Source
For All CellsFor All Cells
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Adenosine
ATP
P
P
P
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Adenosine
(ADP)P P
Energy
ADP
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Cell Activities
Energy needed for:
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Active TransportActive Transport Muscle ContractionMuscle Contraction Synthesis of Organic CompoundsSynthesis of Organic Compounds RepairRepair DigestionDigestion
ATP Used For Cellular ATP Used For Cellular ActivitiesActivities
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So Folks…So Folks…LetLet’’s put that s put that all togetherall together
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Solar EnergyATP:
fuel forcells
CellActivities
CO2 + H20
O2 + C6H12O6
Photosynthesis
light energy to
chemical energy
Glucose
C6H12O6Cellular
Respiration
growthreproduction
active transportmaking proteins
Autotrophs1. Plants2. algae3. Some bacteria
Heterotrophs1.Animals2.Plants3.fungi
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Our Focus So Far Has Been OnElements of
Photosynthesis
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Lets Review ThemLets Review Them
Lets start with Lets start with chromatographychromatography
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Lets take a Lets take a look at look at chloroplastchloroplast, then , then energy energy organelleorganelle
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ChlorophyllChlorophyll
If we sliced If we sliced chloroplast, this is chloroplast, this is what it would look what it would look like insidelike inside
Inside the thylakoid Inside the thylakoid is a structure called is a structure called chlorophyll, a chlorophyll, a pigment which pigment which captures the suns captures the suns energy energy
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These Pigments Absorb Some These Pigments Absorb Some Wavelengths of Light and Wavelengths of Light and
Reflect OthersReflect Others
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Chlorophyll Pigments Chlorophyll Pigments
Chlorophyll aChlorophyll a is most is most common pigment & common pigment & looks bluish-green.looks bluish-green.
Chlorophyll bChlorophyll b looks looks more yellow- green.more yellow- green.
CarotenoidsCarotenoids pigments look yellow pigments look yellow or yellow-orangeor yellow-orange
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Chromatography Chromatography
Chromatography can Chromatography can be used to separate be used to separate components of a components of a mixture of molecules.mixture of molecules.
The molecules of the The molecules of the mixture are carried mixture are carried up the paper based up the paper based on its on its molecules sizemolecules size and and solubility solubility propertiesproperties
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Accessory pigmentsPigments that
work with chlorophyll a and
also absorb light and transfers it as
energy
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The Next Thing We The Next Thing We InvestigatedInvestigated
is is
Where Where PhotosynthesisPhotosynthesis
HappensHappens
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Somewhere Here in LeavesSomewhere Here in Leaves
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So Where are all So Where are all thesethese
ChloroplastsChloroplasts
located in complex located in complex
Leaves?Leaves?
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We Looked at Lilac LeafWe Looked at Lilac LeafCross SectionsCross Sections
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Upper Epidermis
Lower Epidermis
Mesophyll
Palisaide Layer
Spongy Layer
Stom
ate
and
Gua
rd C
ells
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Where Does Where Does The Most The Most
PhotosynthesiPhotosynthesis Happen?s Happen?
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Cross Section of a leafCross Section of a leaf
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Take A Close Up Look AtThese Cells
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Palasaide Palasaide CellsCells
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Granna
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Now We Will Now We Will LookLook at at thethe Process Process
of Photosynthesisof Photosynthesis
But First A But First A QuestionQuestion
????????????????????????
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Where Do Where Do PlantsPlants Get Their Get Their
FoodFood??
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Formula for Formula for PhotosynthesisPhotosynthesis
COCO22 + H + H220 C0 C66HH1212OO66 + O + O22
sun
enzymes
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Photosynthesis in Photosynthesis in leavesleaves
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CC66HH1212OO66
Can Be Converted To Other
Organic Compounds
Like Sugars, Starch, Cellulose, Lipids,
Amino Acids,Proteins
Nucleic Acids,And
Others
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Sugars, Starches, Proteins, etc
Organic Matter
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A Closer A Closer LookLook at at PhotosynthesisPhotosynthesis
Two ReactionsTwo Reactions
Light Dependent ReactionLight Dependent Reaction
Light Independent Light Independent ReactionReaction
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NADPNADP++ Nicotinamide Adinine Dinucleotide Nicotinamide Adinine Dinucleotide
PhosphatePhosphate
H + H+ H+ H+H+ H+ H+ H+ H+ H+
H+ H+ H+ H+H+ H+ H+
H+
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ATPIs made
Water is Split
H2O O2 + H+
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LetLet’’s Keep It Simples Keep It SimpleThree End Products
Of theLight Dependent
Reaction
O2
ATP
NADPH
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So Far We HaveH+ and ATP
What Else Do We Need
To Make C6H12O6 ?
Carbon and OxygenAtoms
Where Do We Get Carbon and Oxygen Atoms ?
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CO2From the
Atmosphere.04%
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The Second Reaction
OfPhotosynthesis
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This Process Produces 150,000,000
Box Cars of OrganicMatter / Year
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Photosynthesis Photosynthesis Is The Most Important Is The Most Important
Biological ProcessBiological ProcessWhich Happens on EarthWhich Happens on Earth
That Makes ChlorophyllThat Makes ChlorophyllThe Most ImportantThe Most ImportantChemical Compound Chemical Compound
On EarthOn Earth
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That’s All