All Cells Need EnergyCells need energy to do a variety of work:Making new molecules.Building membranes and organelles.Moving molecules in and out of the cell. (Maintaining homeostasis)Movement.
Where Does A Cell Get Energy? Food is broken down to a form the cell can use.Extra energy is stored in an ATP molecule, a nucleotide.
What Is ATP?ATP adenosine triphosphate is a molecule made up of an adenine+ ribose, (adenosine), and 3 phosphate groups.AdenineRibose
How Does ATP Work?Energy is stored in the bond between the second and third phosphate group.When the bond is broken, energy is released and ADP is formed. AdenineRibose
ADP-ATP is a cycle
ATP Energy CurrencyWithin a cell, formation of ATP from ADP and phosphate occurs over and over, storing energy each time.As the cell uses energy, ATP breaks down repeatedly to release energy and form ADP and phosphate.
Storing Energy A + P AMP adenosine + phosphate adenosine monophosphate
AMP + P ADP adenosine monophosphate + phosphate adenosine diphosphate ADP + P ATP adenosine diphosphate + phosphate adenosine triphosphate
Releasing Energy ATP ADP + P + ENERGY adenosine triphosphate adenosine diphosphate + phosphate+ energy
Making EnergyCells make energy in two ways:Photosynthesis takes place in the chloroplasts.Respiration takes place in the mitochondria.