TEST BANK
Goodman and Gilman's The
Pharmacological Basis of Therapeutics
14th Edition
Author(s)Laurence Brunton; Bjorn Knollmann
Print ISBN: 9781264258079
,A research group isolates a chemically active compound from a
medicinal plant and determines that the isolated molecule, rather than
the crude plant extract, is responsible for a reproducible biological
effect. What major advance in drug discovery does this approach
represent?
A. Replacing pharmacology with traditional medicine
B. Identifying a defined chemical entity that can be studied and
,optimized
C. Eliminating the need for biological testing
D. Demonstrating that all plant products are therapeutically effective
Correct Answer:
B. Identifying a defined chemical entity that can be studied and
optimized
Rationale:
A defined chemical entity allows investigators to characterize structure,
mechanism, pharmacokinetics, efficacy, and toxicity systematically. A is
incorrect because isolation does not eliminate the role of
pharmacology. C is incorrect because isolated compounds still require
extensive biological and pharmacological testing. D is incorrect because
a biological effect from one plant-derived compound does not establish
efficacy for all plant products.
Question 2
Which feature is most important when a natural product becomes a
starting point for modern drug development?
A. Its historical use alone
B. Its ability to produce a reproducible biological effect that can be
investigated
C. Its availability in large quantities in nature
D. Its classification as a herbal preparation
Correct Answer:
B. Its ability to produce a reproducible biological effect that can be
investigated
, Rationale:
A reproducible biological effect provides a basis for identifying active
molecules and investigating their mechanism and therapeutic potential.
A is insufficient because historical use does not establish
pharmacological efficacy or safety. C is not essential because a useful
compound may occur in very small amounts or later be synthesized. D is
a formulation category rather than evidence of drug-development
potential.
Question 3
A medicinal chemistry team modifies several functional groups on a
compound while retaining its core structure. The primary purpose is to
determine how structural changes affect biological activity. Which
principle is being applied?
A. Structure-activity relationship analysis
B. Pharmacovigilance
C. Therapeutic drug monitoring
D. Bioequivalence testing
Correct Answer:
A. Structure-activity relationship analysis
Rationale:
Structure-activity relationship analysis examines how chemical
modifications alter biological activity and helps identify structural
features important for drug action. B concerns monitoring drug safety
after exposure and use. C involves measuring drug concentrations to
guide therapy. D evaluates whether different pharmaceutical products
Goodman and Gilman's The
Pharmacological Basis of Therapeutics
14th Edition
Author(s)Laurence Brunton; Bjorn Knollmann
Print ISBN: 9781264258079
,A research group isolates a chemically active compound from a
medicinal plant and determines that the isolated molecule, rather than
the crude plant extract, is responsible for a reproducible biological
effect. What major advance in drug discovery does this approach
represent?
A. Replacing pharmacology with traditional medicine
B. Identifying a defined chemical entity that can be studied and
,optimized
C. Eliminating the need for biological testing
D. Demonstrating that all plant products are therapeutically effective
Correct Answer:
B. Identifying a defined chemical entity that can be studied and
optimized
Rationale:
A defined chemical entity allows investigators to characterize structure,
mechanism, pharmacokinetics, efficacy, and toxicity systematically. A is
incorrect because isolation does not eliminate the role of
pharmacology. C is incorrect because isolated compounds still require
extensive biological and pharmacological testing. D is incorrect because
a biological effect from one plant-derived compound does not establish
efficacy for all plant products.
Question 2
Which feature is most important when a natural product becomes a
starting point for modern drug development?
A. Its historical use alone
B. Its ability to produce a reproducible biological effect that can be
investigated
C. Its availability in large quantities in nature
D. Its classification as a herbal preparation
Correct Answer:
B. Its ability to produce a reproducible biological effect that can be
investigated
, Rationale:
A reproducible biological effect provides a basis for identifying active
molecules and investigating their mechanism and therapeutic potential.
A is insufficient because historical use does not establish
pharmacological efficacy or safety. C is not essential because a useful
compound may occur in very small amounts or later be synthesized. D is
a formulation category rather than evidence of drug-development
potential.
Question 3
A medicinal chemistry team modifies several functional groups on a
compound while retaining its core structure. The primary purpose is to
determine how structural changes affect biological activity. Which
principle is being applied?
A. Structure-activity relationship analysis
B. Pharmacovigilance
C. Therapeutic drug monitoring
D. Bioequivalence testing
Correct Answer:
A. Structure-activity relationship analysis
Rationale:
Structure-activity relationship analysis examines how chemical
modifications alter biological activity and helps identify structural
features important for drug action. B concerns monitoring drug safety
after exposure and use. C involves measuring drug concentrations to
guide therapy. D evaluates whether different pharmaceutical products
