Week two-Redox reactions Flashcards
What is a synthesis reaction? And give an example
-Anabolic
-Endergonic
(A+B—-> AB)
Condensation reaction
What is an anabolic reaction?
Require energy
Build new molecules and/or store energy
What does endergonic mean?
Standard change in free energy is positive and energy is absorbed.
What is a decomposition reaction?
-Catabolic
-Exergonic
(AB—-> A+B)
Hydrolysis
Oxidation and reduction reactions
What does catabolic mean?
The breakdown of molecules into smaller units
What does exergonic mean?
When energy is released
What is a condensation reaction?
A reaction in which two larger molecules combine to form a large molecule producing H2O as a by product.
What is a hydrolysis reaction?
A catabolic process in which a water molecule is added to a substance.
What is an oxidation and reduction reaction?
Break-down of ‘food fuels’ in the body
What is an exchange reaction?
-Anabolic and catabolic
-Endergonic and exergonic
AB+C—–>AC+B
What is a redox reaction?
Includes decomposition and exchange reactions
What is a decomposition reaction?
Catabolism of macro-nutrients
Are oxidation and reduction always coupled?
Yes
Name the enzymes in redox reactions
Dehydrogenases
Oxidases
What is dehydrogenases involved in?
The removal of H
What is oxidases involved in?
The removal of O
What are the coenzymes in redox reactions?
NAD+
FAD
What are the features of coenzymes in redox reactions?
- Less specific than enzymes
- Act as co-binders
- Temporary carriers
- Reversible electron and hydrogen acceptors
Give a definition of the mass action effect
The effect of the concentration of chemicals in solution on the occurrence of a particular chemical reaction.
What will happen if there is an increase in the concentration of reactants?
The rate of forward reaction will increase
What will happen if there is an increase in the concentration of products?
The rate of backwards reaction will increase
