Chapter 6
Which of the following is most similar in structure to ATP
an RNA nucleotide = "A"
When you have a severe fever, what may be a grave consequence if this is not controlled?
change in the folding of enzymes
The active site of an enzyme is the region that
is involved in the catalytic reaction of the enzyme
Why is ATP an important molecule in metabolism?
It provides energy coupling between exergonic and endergonic reactions.
What is the best reason that explains why ATP is the main form of energy used by all life forms
The energy given off on ATP breaks down as efficiently transferred to reactions that need energy
What term is used to describe the transfer of free energy from catabolic pathways to anabolic pathways
energy coupling
When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?
lost to the environment
Which of the following is an open system
An organism
How does a non-competitive inhibitor decrease the rate of an enzymatic reaction
By changing the shape of the active site
Which of the following statements is representative of the second law of thermodynamics
Cells require a constant input of energy to maintain their high level of organization.
Which of the following is a statement of the first law of Thermo dynamics
Energy cannot be created or destroyed
Whenever energy is transformed, there's always an increase in the
Entropy of the universe
Processes that are usually spontaneous
Give off energy
For living organisms, which of the following is an important consequence of the first law of thermodynamics
The organism ultimately must obtain all of the necessary energy for life from its environment.
Which of the following is true for all exergonic reaction
The reaction proceeds with a net release of free energy.
Which of the following is our true for anabolic pathways
They consume energy to build up polymers from monomers
How can one increase the rate of a chemical reaction
add a catalyst
Which of the following is an example of potential rather than kinetic energy
a food molecule made up of energy
Which term describes the cellular process of breaking down large molecules into smaller ones
catabolism
Increasing the substrate concentration in an enzymatic reaction could overcome which of the following
competitive inhibition
Which of the following types of reactions would decrease the entropy within a cell?
dehydration reactions (synthesis)