Download ATP AND WORK

ATP AND WORK
Energy
● We need energy to do
work.
● Energy comes from
food.
● All energy in food
comes from the sun.
Energy
● Autotrophs: make their own food
○ ex) plants, some bacteria and protists
● Heterotrophs: eat food for energy
Energy
Adenosine Triphosphate
● Energy can be stored in
chemical bonds
● Adenosine Triphosphate
(ATP)- main source of energy
storage in living things
Adenosine Triphosphate
Parts:
● adenine (nitrogen base)
● ribose (5-carbon sugar)
● 3 phosphate groups
Adenosine Triphosphate
Releasing Energy:
● bond between the last 2
phosphate groups is broken
● ATP
ADP + Pi + ENERGY
Adenosine Triphosphate
Storing Energy:
● Adenosine diphosphate (ADP)
can bond with a phosphate to
make ATP and store energy
● ADP + Pi + ENERGY
ATP
Adenosine Triphosphate
Adenosine Triphosphate
Uses:
●
●
●
●
active transport
protein synthesis
muscle contractions
many more
Adenosine Triphosphate
● Cells only have a few seconds worth of ATP
○ ATP must be continually made
● More efficient to store energy in sugar
○ One glucose has 90x more energy than
one ATP