BIOLOGY 1001 EXAM 2 (ADAM H.)
QUESTIONS AND ANSWERS 2026
VERIFIED.
Capacity to do work - ANS Energy
The most common energy carrier molecule in living organisms is
(A) ATP.
(B) ADP.
(C) DNA.
(D) glucose.
(E) NADPH. - ANS (A) ATP
The reactant in an enzyme-catalyzed reaction is the
(A) substrate.
(B) active site.
(C) product.
(D) allosteric inhibitor.
(E) activation energy. - ANS (A) substrate
In exergonic chemical reactions,
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 29
,(A) energy is stored by the reactions.
(B) the reactants have more energy than do the products.
(C) the reactants have less energy than do the products.
(D) the reactants and products have equal amounts of energy. - ANS (B) the reactants have
more energy than do the products
For many enzymes, the rate of product formation increases as the concentration of the
substrate increases. Eventually the rate of the reaction reaches a maximum at which further
increases in the
concentration of the substrate have no effect. Why?
(A) At high concentrations of substrate, all of the enzyme active sites are being occupied by
substrate molecules.
(B) At high concentrations of substrate, the activation energy of the reaction increases.
(C) At high concentrations of substrate, the activation energy of the reaction decreases.
(D) The enzyme is no longer specific for the substrate.
(E) At high concentrations of substrate, the reaction is endergonic - ANS (A) At high
concentrations of substrate, all of the enzyme active sites are being occupied by substrate
molecules
Activation energy is necessary for all ________ reactions.
(A) exergonic
(B) endergonic
(C) coupled
(D) chemical - ANS (D) chemical
Imagine that you are conducting an experiment on a yeast enzyme known as sucrase. This
enzyme is used by yeast cells to break down the disaccharide sucrose into the monosaccharides
glucose and
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 29
, fructose. What type of reaction is this?
(A) Metergonic
(B) Exergonic
(C) Endergonic
(D) Spontaneous - ANS (B) Exergonic
(energy is released)
Energy that is not converted to useful energy is usually given off as
(A) radioactivity.
(B) electricity.
(C) light.
(D) heat.
(E) entropy - ANS (D) heat
Competitive and noncompetitive enzyme inhibitors differ with respect to
(A) the precise location on the enzyme to which they bind.
(B) their pH.
(C) the temperature at which they work best.
(D) their energies of activation. - ANS (A) the precise location on the enzyme to which they
bind
Human enzymes function best within a narrow range of what 2 things? - ANS pH,
temperature
For most human enzymes, maximum activity occurs at what temperature? - ANS 98 degrees
@COPYRIGHT ALL RIGHTS RESERVED PAGE 3 OF 29
QUESTIONS AND ANSWERS 2026
VERIFIED.
Capacity to do work - ANS Energy
The most common energy carrier molecule in living organisms is
(A) ATP.
(B) ADP.
(C) DNA.
(D) glucose.
(E) NADPH. - ANS (A) ATP
The reactant in an enzyme-catalyzed reaction is the
(A) substrate.
(B) active site.
(C) product.
(D) allosteric inhibitor.
(E) activation energy. - ANS (A) substrate
In exergonic chemical reactions,
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 29
,(A) energy is stored by the reactions.
(B) the reactants have more energy than do the products.
(C) the reactants have less energy than do the products.
(D) the reactants and products have equal amounts of energy. - ANS (B) the reactants have
more energy than do the products
For many enzymes, the rate of product formation increases as the concentration of the
substrate increases. Eventually the rate of the reaction reaches a maximum at which further
increases in the
concentration of the substrate have no effect. Why?
(A) At high concentrations of substrate, all of the enzyme active sites are being occupied by
substrate molecules.
(B) At high concentrations of substrate, the activation energy of the reaction increases.
(C) At high concentrations of substrate, the activation energy of the reaction decreases.
(D) The enzyme is no longer specific for the substrate.
(E) At high concentrations of substrate, the reaction is endergonic - ANS (A) At high
concentrations of substrate, all of the enzyme active sites are being occupied by substrate
molecules
Activation energy is necessary for all ________ reactions.
(A) exergonic
(B) endergonic
(C) coupled
(D) chemical - ANS (D) chemical
Imagine that you are conducting an experiment on a yeast enzyme known as sucrase. This
enzyme is used by yeast cells to break down the disaccharide sucrose into the monosaccharides
glucose and
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 29
, fructose. What type of reaction is this?
(A) Metergonic
(B) Exergonic
(C) Endergonic
(D) Spontaneous - ANS (B) Exergonic
(energy is released)
Energy that is not converted to useful energy is usually given off as
(A) radioactivity.
(B) electricity.
(C) light.
(D) heat.
(E) entropy - ANS (D) heat
Competitive and noncompetitive enzyme inhibitors differ with respect to
(A) the precise location on the enzyme to which they bind.
(B) their pH.
(C) the temperature at which they work best.
(D) their energies of activation. - ANS (A) the precise location on the enzyme to which they
bind
Human enzymes function best within a narrow range of what 2 things? - ANS pH,
temperature
For most human enzymes, maximum activity occurs at what temperature? - ANS 98 degrees
@COPYRIGHT ALL RIGHTS RESERVED PAGE 3 OF 29
