BIOL 1201 EXAMS: LATEST A+ GUIDE WITH ESSENTIAL
QUESTIONS AND ANSWERS
Enzymes speed up the rate of the reaction without changing the ΔG for the reaction
Which of the following statements about enzymes is true?
a catabolic pathway
The process of cellular respiration, which converts simple sugars such as glucose into CO2 and
water, is an example of _____.
The entropy of the products is greater than the entropy of the reactants.
Which of the following statements about the combustion of glucose with oxygen to form water
and carbon dioxide (C6H12O6 + 6 O2 → 6 CO2 + 6 H2O) is correct?
the covalent bonds of a sugar molecule: potential energy
Energy is observed in two basic forms: potential and kinetic. Which of the following correctly
matches these forms with a source of energy?
A reaction that is at equilibrium is not capable of doing any work.
Which of the following statements about equilibrium of chemical reactions is correct?
The cycling between ATP and ADP + Pi provides an energy coupling between catabolic and
anabolic pathways.
Which of the following statements about ATP (adenosine triphosphate) is correct?
increase the rate of a reaction without being consumed by the reaction
Enzymes are described as catalysts, which means that they _____.
The enzyme has an allosteric regulatory site
Which of the following would be unlikely to contribute to the substrate specificity of an
enzyme?
The active site can provide heat from the environment that raises the energy content of the
substrate
Which of the following is NOT a way in which an enzyme can speed up the reaction that it
catalyzes?
The compound is a competitive inhibitor
, The binding of a compound to an enzyme is observed to slow down or stop the rate of the
reaction catalyzed by the enzyme. Increasing the substrate concentration reduces the inhibitory
effects of this compound. Which of the following could account for this observation?
The final product of a metabolic pathway is usually the compound that regulates the
pathway.
Which of the following statements about feedback regulation of a metabolic pathway is
correct?
Cells require a continuous input of energy to maintain their high level of organization
Which of the following statements is representative of the second law of thermodynamics?
Metabolism consists of all the energy transformation reactions in an organism
Which of the following is true of metabolism in its entirety in all organisms?
is involved in the catalytic reaction of the enzyme.
The active site of an enzyme is the region that
by changing the shape of the enzyme's active site
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
Positive
What would the value of ΔS be for a chemical reaction in which a molecule is broken down into
smaller components?
Glucose + fructose → sucrose
Which of the following reactions would be endergonic?
releasing free energy that can be coupled to other reactions
In general, the hydrolysis of ATP drives cellular work by __________.
feedback inhibition
ATP allosterically inhibits enzymes in ATP-producing pathways. The result of this is called
__________.
The action of competitive inhibitors may be reversible or irreversible.
Which of these statements about enzyme inhibitors is true?
Both are nonprotein enzyme helpers; but most cofactors are metal ions, and coenzymes are
organic molecules that are a specific type of cofactor.
QUESTIONS AND ANSWERS
Enzymes speed up the rate of the reaction without changing the ΔG for the reaction
Which of the following statements about enzymes is true?
a catabolic pathway
The process of cellular respiration, which converts simple sugars such as glucose into CO2 and
water, is an example of _____.
The entropy of the products is greater than the entropy of the reactants.
Which of the following statements about the combustion of glucose with oxygen to form water
and carbon dioxide (C6H12O6 + 6 O2 → 6 CO2 + 6 H2O) is correct?
the covalent bonds of a sugar molecule: potential energy
Energy is observed in two basic forms: potential and kinetic. Which of the following correctly
matches these forms with a source of energy?
A reaction that is at equilibrium is not capable of doing any work.
Which of the following statements about equilibrium of chemical reactions is correct?
The cycling between ATP and ADP + Pi provides an energy coupling between catabolic and
anabolic pathways.
Which of the following statements about ATP (adenosine triphosphate) is correct?
increase the rate of a reaction without being consumed by the reaction
Enzymes are described as catalysts, which means that they _____.
The enzyme has an allosteric regulatory site
Which of the following would be unlikely to contribute to the substrate specificity of an
enzyme?
The active site can provide heat from the environment that raises the energy content of the
substrate
Which of the following is NOT a way in which an enzyme can speed up the reaction that it
catalyzes?
The compound is a competitive inhibitor
, The binding of a compound to an enzyme is observed to slow down or stop the rate of the
reaction catalyzed by the enzyme. Increasing the substrate concentration reduces the inhibitory
effects of this compound. Which of the following could account for this observation?
The final product of a metabolic pathway is usually the compound that regulates the
pathway.
Which of the following statements about feedback regulation of a metabolic pathway is
correct?
Cells require a continuous input of energy to maintain their high level of organization
Which of the following statements is representative of the second law of thermodynamics?
Metabolism consists of all the energy transformation reactions in an organism
Which of the following is true of metabolism in its entirety in all organisms?
is involved in the catalytic reaction of the enzyme.
The active site of an enzyme is the region that
by changing the shape of the enzyme's active site
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
Positive
What would the value of ΔS be for a chemical reaction in which a molecule is broken down into
smaller components?
Glucose + fructose → sucrose
Which of the following reactions would be endergonic?
releasing free energy that can be coupled to other reactions
In general, the hydrolysis of ATP drives cellular work by __________.
feedback inhibition
ATP allosterically inhibits enzymes in ATP-producing pathways. The result of this is called
__________.
The action of competitive inhibitors may be reversible or irreversible.
Which of these statements about enzyme inhibitors is true?
Both are nonprotein enzyme helpers; but most cofactors are metal ions, and coenzymes are
organic molecules that are a specific type of cofactor.
