Chapter 6

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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)


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