Transcript I`ve got the Power! Of ATP that is…..

I’ve got the Power!
Of ATP that is…..
ATP?
• Adenosine TriPhosphate
• A modified adenosine
nucleotide, w/ 3 P’s
attached
– The 3 P groups are
unstable, and the end 2 are
easily broken off(ATP
hydrolysis)
– This is an exergonic
Reaction-energy is used
everywhere in cells
The ATP cycle
ATP hydrolysis
ATP + H2O  ADP + P + energy
Where does it Come From?
Cellular Respiration!!
•
•
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This process oxidizes (removes
electrons) glucose, & converts the
chemical energy into ATP
This occurs in ALL types of cells,
including plants
Can produce 38 ATP for one
molecule of glucose-WOW!!!
C6H12O6 + O2  CO2 + H2O + ATP
•
Takes place in 3 stages
1.
2.
3.
Glycolysis (2 ATP)-cytoplasm
Kreb’s cycle (2 ATP)-mitochondria
Electron transport chain (34 ATP)mitochondria
The Steps……. Kind of
• All organisms start w/
glycolysis
– This series of 10
reactions produces 2
ATP & occurs in the
cytoplasm
• What happens next
depends on whether or
not O2 is present!!!
Without O2…
(anaerobic organisms)
• Gylcolysis & then…
• Fermentation-2 types
– Alcoholic
• Used by yeast & bacteria
• Ethanol is a by-product
– Lactic acid
• Done by muscle cells during
strenuous exercise (oxygen
debt)
• Fermentation only
produces 2 ATP per
glucose 
With O2…..
Aerobic organisms
• Start w/ glycolysis &
then….
• The Kreb’s cycle &
electron transport
chain(ETC)
– Both occur in
mitochondria
– Use electronegativity of
O2
– Produce 34 ATP per
glucose
– CO2 & H2O are
byproducts
What about photosynthesis?
• Plants, algae, & cyanobacteria
• Takes place in chloroplasts
CO2 + H2O + sunlight C6H12O6 + O2
• 2 stages:
– Light reactions(produce energy, use
water)
– Calvin cycle(uses energy, produces
glucose)
• REMEMBER-plants carry out
cellular respiration too!!!!
Relationship between
Photosynthesis &
respiration