Metabolism, Oxidation, and Reduction Flashcards
Metabolic reactions are often accompanied by the ____ of electrons between reactants
transfer
Where is energy stored?
-in chemical bonds (as potential energy)
-in electrons
If electrons are rearranged or released, then potential energy can be____
reduced
a rapid chemical combination with oxygen
combustion
Organic + O2–> CO2 + H2O + Energy
Combustion
Combustion releases____
energy
Combustion is a _______ reaction
exergonic
Reaction with O2 is a form of ____
oxidation
Oxidation-Reduction Reactions:
energy is stored in _____ bonds
covalent
When covalent bonds are broken or rearranged, electrons can be transferred between reactants.
These electron-transfer reactions are ______
Oxidation-Reduction Reactions
or
Redox Reactions
Oxidation-Reduction Reactions:
an electron is lost
oxidation
Oxidation-Reduction Reactions:
an electron is gained
reduction
Oxidation-Reduction Reactions:
Addition of a negatively charged electron _______ the overall charge of a molecule
reduces
Oxidation-Reduction Reactions:
A(reduces) + B (oxidizes) <—> A(oxidized) +B(reduced)
OIL RIG
Oxidation Is Loss
Reduction Is Gain
IMPORTANT RULE!
Oxidations and reductions _____ occur in isolation
NEVER
If one reactant is oxidized, another reactant MUST be _____
reduced
Redox Reactions:
The molecule with more hydrogens is usually the more _______ one
reduced
Glucose (C6H12O6) is _____ to CO2
(Glucose looses H)
oxidized
O2 is ______ to H2O
(O2 gains H)
reduced
Every electron transfer reaction is ____
Exergonic
Electron _____ energy with each transfer
lose
Released free energy drives ______ synthesis
ATP
Releasing energy
Exergonic
transfer of electrons in reaction
redox reaction
