Biochemistry Exam Questions and Solutions: Molecular Biology, Exams of
Nursing
How many enzyme-catalyzed reactions make up the glycolysis pathway?
a. 12
b. 8
c. 10
d. 9 - ANSWERC
In a buffer, if the concentration of the proton acceptor (conjugate base) is
greater than the concentration of the proton donor (weak acid), what will be
the expected outcome?
A) H+ concentration will increase and pH will increase
B) H+ concentration will increase and pH will decrease
C) H+ concentration will decrease and pH will increase
D) H+ concentration will decrease and pH will decrease - ANSWERB
,What is an amphibolic reaction?
A. A reaction that synthesize compounds
B. A reaction that degrades large molecules
C. Both A and B
D. None of the above - ANSWERC
The small molecules that are intermediates in the degradation or
biosynthesis of biopolymers are called:
A. Metabolites
B. Electrolytes
C. Macromolecules
D. Cells - ANSWERA
Which of the following is NOT a common theme in metabolism?
A. Organisms and cells interact with their environment
B. The cells of organisms are static
C. Metabolic pathways in each organism are specified by the genes it contains
D. Cells maintain specific internal concentrations of ions, metabolites, and
enzymes - ANSWERB
Match the form of metabolic pathway to its correct description
,spiral
linear
cyclic
a. series of independent enzyme-catalyzed reactions in which the product on
one reaction is the substrate for the next
b. sequence forms a closed loop, so the intermediates are regenerated
c. the same set of enzymes is used repeatedly for lengthening/shortening of a
molecule - ANSWERSpiral- C
Cyclic- B
Linear- A
What is stereospecificity?
A.enzymes that act only on a single stereoisomer of the substrate.
B.Highly specific catalysts
C.Lack of formation of waste by-products
D.The most important aspect of enzyme specificity - ANSWERA
What is reaction specificity?
A.the lack of formation of wasteful by-products.
B.Reflected in the exceptional purity of the product.
C.the most important aspect of enzyme specificity
D.All of the above - ANSWERD
, What is the function of oxidoreductase?
A.catalyze oxidation-dehydrogenase
B.catalyze group transfer reactions
C.catalyze hydrolysis
D. catalyze lysis of a substrate - ANSWERA
What is the function of transferase?
A.catalyze oxidation-dehydrogenase
B.catalyze group transfer reactions
C.catalyze hydrolysis
D.catalyze lysis of a substrate - ANSWERB
What is the function of hydrolase?
A.catalyze oxidation-dehydrogenase
B.catalyze group transfer reactions
C.catalyze hydrolysis
D.catalyze lysis of a substrate - ANSWERANSWER: C
What is the function of lyase?
A.catalyze oxidation-dehydrogenase
B.catalyze group transfer reactions
Nursing
How many enzyme-catalyzed reactions make up the glycolysis pathway?
a. 12
b. 8
c. 10
d. 9 - ANSWERC
In a buffer, if the concentration of the proton acceptor (conjugate base) is
greater than the concentration of the proton donor (weak acid), what will be
the expected outcome?
A) H+ concentration will increase and pH will increase
B) H+ concentration will increase and pH will decrease
C) H+ concentration will decrease and pH will increase
D) H+ concentration will decrease and pH will decrease - ANSWERB
,What is an amphibolic reaction?
A. A reaction that synthesize compounds
B. A reaction that degrades large molecules
C. Both A and B
D. None of the above - ANSWERC
The small molecules that are intermediates in the degradation or
biosynthesis of biopolymers are called:
A. Metabolites
B. Electrolytes
C. Macromolecules
D. Cells - ANSWERA
Which of the following is NOT a common theme in metabolism?
A. Organisms and cells interact with their environment
B. The cells of organisms are static
C. Metabolic pathways in each organism are specified by the genes it contains
D. Cells maintain specific internal concentrations of ions, metabolites, and
enzymes - ANSWERB
Match the form of metabolic pathway to its correct description
,spiral
linear
cyclic
a. series of independent enzyme-catalyzed reactions in which the product on
one reaction is the substrate for the next
b. sequence forms a closed loop, so the intermediates are regenerated
c. the same set of enzymes is used repeatedly for lengthening/shortening of a
molecule - ANSWERSpiral- C
Cyclic- B
Linear- A
What is stereospecificity?
A.enzymes that act only on a single stereoisomer of the substrate.
B.Highly specific catalysts
C.Lack of formation of waste by-products
D.The most important aspect of enzyme specificity - ANSWERA
What is reaction specificity?
A.the lack of formation of wasteful by-products.
B.Reflected in the exceptional purity of the product.
C.the most important aspect of enzyme specificity
D.All of the above - ANSWERD
, What is the function of oxidoreductase?
A.catalyze oxidation-dehydrogenase
B.catalyze group transfer reactions
C.catalyze hydrolysis
D. catalyze lysis of a substrate - ANSWERA
What is the function of transferase?
A.catalyze oxidation-dehydrogenase
B.catalyze group transfer reactions
C.catalyze hydrolysis
D.catalyze lysis of a substrate - ANSWERB
What is the function of hydrolase?
A.catalyze oxidation-dehydrogenase
B.catalyze group transfer reactions
C.catalyze hydrolysis
D.catalyze lysis of a substrate - ANSWERANSWER: C
What is the function of lyase?
A.catalyze oxidation-dehydrogenase
B.catalyze group transfer reactions
