Flows in one direction
Car at top of hill
energy in motion
Car rolling downhill
Laws of thermodynamics
amount of energy in the universe is constant. Energy can change form and be transferred.
Energy changes from a more useful to a less useful form. It becomes increasingly more random.
A chemical reaction where energy is
as a byproduct of the reaction.
AB ---------} A + B +
Chemical reactions that require an
of energy to make the reaction go.
A + B + energy -------------} AB
ATP and reactions
from an exergonic reaction is used to run an endergonic reaction.
ATP --------} ADP + P + energy
ADP + P + energy--------} ATP
A series of chemical reactions making up a pathway.
The pathway may be linear, cyclic or a combination.
- Most metabolic reactions have a
- This means that most are
- Direction of reaction depends on concentrations of reactants and products.
Reactants are located on the flat end of the arrow and products on the pointy end!!
Biology Energy notes