TEST BANK
Goodman and Gilman's The
Pharmacological Basis of Therapeutics
14th Edition
Author(s)Laurence Brunton; Bjorn Knollmann
Print ISBN: 9781264258079
,Question 1
Which observation most directly contributed to the modern concept of
using medicinal plants as starting points for drug discovery?
A. Plant-derived compounds can contain biologically active constituents
that produce reproducible physiological effects
B. All plant-derived substances have predictable pharmacokinetics in
humans
,C. Plant extracts are inherently safer than synthetic drugs
D. Therapeutic activity in plants eliminates the need for chemical
characterization
Correct Answer:
A. Plant-derived compounds can contain biologically active constituents
that produce reproducible physiological effects
Rationale:
A is correct because medicinal plants can contain chemically defined
constituents with biological activity, providing starting points for
isolation and subsequent drug development. B is incorrect because
plant-derived compounds can have highly variable absorption,
metabolism, distribution, and toxicity. C is incorrect because natural
origin does not guarantee safety. D is incorrect because identifying and
characterizing active constituents is essential for developing
reproducible therapeutics.
Question 2
A researcher isolates a biologically active compound from a medicinal
plant and determines its chemical structure. What is the most
appropriate next objective in medicinal chemistry?
A. Eliminate all structural complexity regardless of its relationship to
activity
B. Determine how structural features influence biological activity
C. Assume the isolated compound is ready for clinical use
D. Replace the compound with an unrelated molecule of lower
molecular weight
, Correct Answer:
B. Determine how structural features influence biological activity
Rationale:
B is correct because understanding the relationship between chemical
structure and biological activity is central to medicinal chemistry and
supports systematic optimization. A is incorrect because structural
simplification should be guided by pharmacological consequences
rather than performed indiscriminately. C is incorrect because biological
activity alone does not establish efficacy, selectivity, pharmacokinetic
suitability, or safety. D is incorrect because molecular weight alone does
not determine whether a compound is an appropriate lead.
Question 3
Which term best describes a compound that shows sufficient biological
activity to serve as a starting point for further chemical optimization?
A. Lead compound
B. Biomarker
C. Antagonist
D. Prodrug
Correct Answer:
A. Lead compound
Rationale:
A is correct because a lead compound is a molecule with characteristics
that justify further optimization toward a therapeutic candidate. B is
incorrect because a biomarker is a measurable indicator of a biological
or disease process. C is incorrect because antagonist describes a
pharmacological interaction with a receptor or target. D is incorrect
Goodman and Gilman's The
Pharmacological Basis of Therapeutics
14th Edition
Author(s)Laurence Brunton; Bjorn Knollmann
Print ISBN: 9781264258079
,Question 1
Which observation most directly contributed to the modern concept of
using medicinal plants as starting points for drug discovery?
A. Plant-derived compounds can contain biologically active constituents
that produce reproducible physiological effects
B. All plant-derived substances have predictable pharmacokinetics in
humans
,C. Plant extracts are inherently safer than synthetic drugs
D. Therapeutic activity in plants eliminates the need for chemical
characterization
Correct Answer:
A. Plant-derived compounds can contain biologically active constituents
that produce reproducible physiological effects
Rationale:
A is correct because medicinal plants can contain chemically defined
constituents with biological activity, providing starting points for
isolation and subsequent drug development. B is incorrect because
plant-derived compounds can have highly variable absorption,
metabolism, distribution, and toxicity. C is incorrect because natural
origin does not guarantee safety. D is incorrect because identifying and
characterizing active constituents is essential for developing
reproducible therapeutics.
Question 2
A researcher isolates a biologically active compound from a medicinal
plant and determines its chemical structure. What is the most
appropriate next objective in medicinal chemistry?
A. Eliminate all structural complexity regardless of its relationship to
activity
B. Determine how structural features influence biological activity
C. Assume the isolated compound is ready for clinical use
D. Replace the compound with an unrelated molecule of lower
molecular weight
, Correct Answer:
B. Determine how structural features influence biological activity
Rationale:
B is correct because understanding the relationship between chemical
structure and biological activity is central to medicinal chemistry and
supports systematic optimization. A is incorrect because structural
simplification should be guided by pharmacological consequences
rather than performed indiscriminately. C is incorrect because biological
activity alone does not establish efficacy, selectivity, pharmacokinetic
suitability, or safety. D is incorrect because molecular weight alone does
not determine whether a compound is an appropriate lead.
Question 3
Which term best describes a compound that shows sufficient biological
activity to serve as a starting point for further chemical optimization?
A. Lead compound
B. Biomarker
C. Antagonist
D. Prodrug
Correct Answer:
A. Lead compound
Rationale:
A is correct because a lead compound is a molecule with characteristics
that justify further optimization toward a therapeutic candidate. B is
incorrect because a biomarker is a measurable indicator of a biological
or disease process. C is incorrect because antagonist describes a
pharmacological interaction with a receptor or target. D is incorrect
