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9.1 Energy Notes – The Point Is To Make ATP!
Cell Energy
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____________ is essential to life
Organisms obtain energy from their environment:
 Plants: trap energy from the ______ and store it for later use
 ____________: eat food; in some ways, they obtain energy from plants
Which of the following requires energy? (circle them)
 Active transport
 Cell division
 Production and transport of proteins
 Exercising
 Heart pumping
 Brain controlling all of the functions in your body
Living Economy
 Fueling the economy
 Eat high energy organic molecules (___________)
 Break them down =
 Capture energy in the form a cell can use

Need an _________ currency
o A way to pass energy around
What happens after you finish “work”?
 Body needs a quick source of energy
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Cellular level: energy is stored in the bonds of ____________________________ (ATP)
Why is fat the choice?
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Humans store their excess energy as fat rather than carbohydrates…WHY?
 When broken down by the body, each fat molecule yields ____ ATP molecules; each
carbohydrate yields _____ ATP molecules.
 Carbohydrates bind and store _________. The metabolism of water yields 0 ATP. Fat
has no water bound to it.
 An adult who weighs 70 kg (~150 lbs) can survive on energy derived from stored fat for
30 days without eating. The same person would have to weigh nearly 140 kg (~310 lbs)
to survive 30 days on carbohydrates.
ATP Structure
 Adenosine molecule + 3 phosphate groups
 Recall:
 Phosphate groups are charged particles
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ATP (continued)
 Adenosine Triphosphate
 adenine + ___________________ + _________________  AMP
 AMP + _____________  ___________
 ADP + _____________  ____________
ATP is __________
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We cannot store ATP because:
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 Only short term energy storage
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As long as phosphate groups are available the cell can make more ATP
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How cells use the energy…
 ATP is broken down and energy is released
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Cells must capture the energy or it is wasted
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Uses in the cell:
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How is the way a cell uses energy just like batteries in a remote?