Biology 2.4. Energy and Chemical Reactions in Cells. Energy and Chemical Reactions. Energy for Life Processes Energy is the ability to move or change matter. Energy exists in many forms; including light, heat, chemical energy, mechanical energy, and electrical energy. Energy.
Energy and Chemical Reactions in Cells
Energy for Life Processes
Putting a Mentos mint into a
Diet Coke will create a dramatic
The arrow readsas “changes to” or “forms”.
NaCl Na+ +Cl-
A chemical reaction causes
fireflies to give off bioluminescent
An enzyme speeds up a chemical
reaction by lowering its energy of
activation, the energy that must be
supplied in order for molecules to
react with one another.
Enzymes are proteins, produced by different
cells of humans, animals, plants and
microorganisms, which accelerate the
rate of chemical reactions in living organisms.
Like all catalysts, enzymes work by lowering
the amount of activation energy needed for a
reaction to occur and thus dramatically
accelerating the rate of the reaction.