Class Notes 1: ATP
Adenosine triphosphate
• All living things need energy to live.
• Many cellular processes need energy
(muscle use during exercise, cell
division, cell growth, thinking, heart
pumping, etc.)
• The energy molecule that living
things use is called ATP.
Adenosine triphosphate
ATP is a molecule made of
1.Adenine
2.Ribose
(sugar)
3.Three
Phosphates
(PO4)
III. Storage of energy
Chemical bonds hold the phosphates
together.
Energy is stored in these bonds
Energy is released when the bond
between the 3rd Phosphate & the 2nd
Phosphate is broken. ATP  ADP + P
Adenosine
P
P
P
P
Adenosine
P
P
+
ENERGY
V. Formation of ATP
Photosynthesis
: Plants trap
sunlight in the
chlorophyll
Plants use the
sun’s energy
to make
glucose in the
chloroplast
Cellular
Respiration
Mitochondria
in both plants
and animals
make the
glucose into
ATP
Summary
What type of energy do cells use?
How is this energy recycled?