Transcript ATP - Weebly

The Need For Energy
 Energy is essential to life
 Plants obtain energy from the sun and
store it in the bonds of molecules for later
use-this process is called
photosynthesis
 Energy stored in chemical bonds is called
chemical potential energy
What cell processes
require energy?
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Active transport
Cell division (mitosis)
Movement of flagella or cilia
Production of proteins (by ribosomes)
Transport of proteins (by ER and Golgi)
Muscles contracting
1.) What is the name of the chemical
that stores energy for a cell?
ATP
Adenosine triphosphate
Adenosine plus 3 phosphate groups (PO3-)
stuck together
Remember: negatively charged particles
repel, so the phosphates don’t want to be
together
ATP
 When the bond between 2 of the
phosphate groups is broken, energy is
given off, like a spring being released.
 When one phosphate group is lost, the
ATP molecule becomes ADP (adenosine
diphosphate)
 To make ATP, the cell uses the energy
captured by the cell (either through
photosynthesis or food) to add another
phosphate group on to ADP.
 ADP + PO-3  ATP