Download - Photosynthesis and Cell Respiration
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Photosynthesis and Cell Respiration
Dra. Paulina Trigo Espejel
Life Sciences
TEC-CEM
Sep. 2011
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Remember?Ability to generate
work
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Remember again?Autotrophs
Heterotrophs
¿Why is energy stored?
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Which fuel do living beings use?
Adenosine Ribose Phosphate Groups
ATP is used for active membrane transport
ADP &ATP are like the
batteries of the cell.
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Research!
• Find other activities in which ATP is required. Write as many as you can on this class summary.
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Photo what?
Photosynthesis
Process
Autotrophs
+ CO2 + H2O = Energy + O2
Remember carbohydrate
functions?
* On your book look for the general formula for photosyntesis.
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What does photosynthesis needs?
• Water• CO2• Light • chlorophyll-------- Chloroplasts
Pigments: Do you know any other pigment?
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A Chloroplast?!!!!¨*¨¨¨¨
• Where photosynthesis takes place• Cointains tilakoids which organize photosystems. • They also contain chlorophyll
Nambe the parts of the chloroplast.
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How does photosyntesis takes place?
Photosynthesis
includes
from
Takes place inTakes place uses
produce produce
uses
Light depndentreactions
Calvin Cycle
membranes Stroma NADPHATPSolar
ATP NADPH O2 Chloroplasts High energyCH’s
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NADP?
• Try to say it’s name very fast
Transports two
electrons and a
hydrogen
High energy!
NADPH
This can free energy obtained from NADP.
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Wasn´t there a light dependent reaction????
Describe what happens in each step.
Mention the differences between
photosystems I and II
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Which was the one that didn´t require light?
CO2 Enters the cycleEnergy enters
New 6 carbonmolecules
Carbohydrates
A 6 carbon sugar is produced
Also called Calvin Cycle
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Calories make you fat?
• A calorie is the energy requiered to heat 1 g of water 1 oC
Calories in food labels are referred as a C this actually means
kilocalories.
Just for fun check the labels on what you eat and try to figure out how many calories you eat.
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How do human beings get energy?
Glucose
Glucolysis Krebs
Electron(transport)
FermentationAlcohol or
Lactic acid
What would happen if instead of freeing energy in a controlled way it was released sudedenly and uncontrolled?
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Gluco…what????....
Gluco Lysis6 carbons sugar Divide, destroy
This process consumes 2 ATP’s
but produces 4.
It also produces NADH
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Krebs Cycle (citric acid)
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Electron transport chain
Electron TransportHydrogen Ion Movement
ATP Production
ATP synthase
Channel
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No oxygen!!!!
Sportsmen produce large amounts of
lactic acid, research and find out how the
eliminate it.