Flashcards in Lecture 8 Deck (22):
The energy required to contort the reactant molecules so the bonds can break
a restricted region of the enzyme that actually binds to the substrate
a specific receptor on the enzyme that is not the active site
consume energy to build complicated molecules from simpler compounds
Adenosine Tri Phosphate. Used as primary source of energy.
release energy by breaking down complex molecules to simpler compounds
a chemical agent that changes the rate of a reaction without being consumed by the reaction
takes the place of a substrate in the active site
one that absorbs free energy from its surroundings. Endergonic reactions store energy
The capacity to cause change, especially to do work
One of the common methods of metabolic control is?feedback inhibition?in which a metabolic pathway is turned off by its end product
first law of thermodynamics
? Energy can be changed from one form to another (can be transferred and transformed), but it cannot be created or destroyed.
? However, energy cannot be created or destroyed
? Example: Plants transform light to chemical energy; they do not produce energy.
is the energy of motion, energy that is actually doing work
Cells carry out thousands of chemical reactions
? The sum of these reactions constitutes cellular metabolism
? cellular metabolism = add up all the chemical activities, the reactions, that occur in a cell and the total is cellular metabolism
? The totality of an organism?s chemical reactions is called metabolism.
? A cell?s metabolism is an elaborate road map of the chemical reactions in that cell.
alters an enzyme?s function by changing its shape
Adding Phosphate. (ATP production)
second law of thermodynamics
states that every energy transformation must make the universe more disordered
? each time energy is changed some of it is lost to the system
? Energy changes are not 100% efficient
-Energy conversions increase disorder, or entropy
- Some energy is always lost as heat
a reactant which binds to an enzyme