Chapter 6 Quiz
When energy released by an exergonic reaction is used to drive an end endergonic reaction
Coupled reaction
The energy that must be added to cause molecules to react with each other
Energy of activation
The relative amount of disorganization
Entropy
is an unusable form of energy
Heat
as soon as a critizal level of end product builds up
If an enzymatic reaction was controlled by feedback inhibition, we would expect it to stop
breaking down molecules
catabolism
requires input of energy
endergonic reaction
spontaneous and release energy
exergonic reactions
Proteins
most enzymes are
ATP supplies the energy needed to pump substances across the plasma membrane
transport work
energy cannot be created or destroyed but it can be changed from one form to another
which of the fallowing statements most accurately describes the first law of thermodynamics
synthesis of molecules
anabolism
endergonic reaction
Chemical reactions that require an input of energy are
ADP plus phosphate plus energy
ATP can be broken down into
The enzym and the substrate form a temporary complex
During an enzymatic reaction, what happens to the enzyme?
ATP supplies the energy needed for muscle contractions, chromosomes to moves cilia and flagella to beat, ext
Mechanical work
but the amount of stored ATP is not great because our body constantly generates ATP from ADP + P
Most cells use a tremendous amount of ATP
the sun
The ultimate source of energy for the majority of organisms on Earth is
a coupled reaction
What is a metabolic reaction called that involves one reaction releasing energy to provide energy for a second reaction that requires energy?
Entropy has decreased
When a cell uses substantial energy to organize its cell contents to a greater degree than the organization that exists outside the living cell:
adding the correct enzyme can lower the energy of activation
Which is true about energy of activation
Chemicals, but no energy, may cycle through living things
Which of the following is a true statement regarding energy and chemicals?
Metobolic pathways often intersent one another
Which of the following is an accurate statement about metobolic pathways?
whether or not oxygen is involved, a reaction is considered an oxidation reaction if electrons are lost
Which of the following is true statement regarding oxidation reaction?
The catalyze only one specific type of reaction
Which of the following statements is true about enzyme
change to optimum pH for the reaction
Which of the following will increase enzyme activity?
Energy cannot be changed from one formt o another without a loss of usable energy
Which statement most accurately describes the second law of thermodynamics
free energy
amount of energy available to do work after a chemical reaction has occurred is called
subtracting the free energy content of the reactants from that of the products
the change in free energy of a reaction, delta G, is calculated by
