Energy and Enzymes Flashcards
Are organisms open or closed systems?
Open systems, they absorb energy and release heat
Whats the first law of thermodynamics?
Energy can be transferred and transformed, but it cannot be created or destroyed
What do organisms live at the expense of?
Free energy
Whats the second law of thermodynamics?
Every transfer of energy makes the universe more disordered
What is Entropy?
A measure of disorder
What is an exergonic reaction?
A net release of free energy
What is an endergonic reaction?
Absorbed free energy from its surroundings
What do catabolic pathways do?
release free energy in a series of reactions
What is ATP?
Adenosine triphosphate (The energy currency)
True or false?
In most cases the immediate source of energy that powers cellular work is ATP
True
In energy of activation, reactants must absorb ______ from their surroundings
Energy
What is a substrate?
A reactant that binds to na enzyme
_________ results in the breaking in the glycosidic bond
Hydrolisis
As temperature _________ collisions between substrates occur more _________
Increases
Frequently
pH influences __________, and therefor 3rd degree structure
Ionization
