TEST BANK
Goodman and Gilman's The
Pharmacological Basis of Therapeutics
14th Edition
Author(s)Laurence Brunton; Bjorn Knollmann
Print ISBN: 9781264258079
,Question 1
A researcher isolates a biologically active compound from a medicinal
plant and wants to develop it into a drug lead. What is the most
appropriate description of this compound at this stage?
A. A fully validated therapeutic drug
B. A lead compound requiring further optimization
,C. A final pharmaceutical formulation
D. A pharmacogenomic biomarker
Correct Answer:
B. A lead compound requiring further optimization
Rationale:
A biologically active compound isolated from a natural source may
serve as a lead compound, but it generally requires optimization for
potency, selectivity, pharmacokinetics, safety, and drug-like properties
before becoming a drug. Option A is incorrect because biological
activity alone does not establish a compound as an approved
therapeutic. Option C is incorrect because formulation occurs after the
drug candidate has been sufficiently characterized. Option D is incorrect
because a biomarker is a measurable biological indicator, not
necessarily a therapeutic compound.
Question 2
Which property of medicinal plants has historically made them
important sources for drug discovery?
A. They contain only compounds with predictable toxicity
B. They provide structurally diverse molecules with biological activity
C. They eliminate the need for synthetic chemistry
D. They guarantee high oral bioavailability of active compounds
Correct Answer:
B. They provide structurally diverse molecules with biological activity
, Rationale:
Plants can produce chemically diverse natural products that interact
with biological targets, making them valuable sources of drug leads.
Option A is incorrect because plant-derived compounds can have
significant toxicity. Option C is incorrect because synthetic chemistry is
often required to optimize natural-product leads. Option D is incorrect
because many natural products have poor absorption, metabolism, or
other pharmacokinetic limitations.
Question 3
A compound isolated from a plant produces a desired pharmacological
effect, but its potency is too low for practical therapeutic use. Which
process is most directly intended to improve this characteristic while
retaining useful biological activity?
A. Lead optimization
B. Drug dispensing
C. Pharmacovigilance
D. Postmarketing surveillance
Correct Answer:
A. Lead optimization
Rationale:
Lead optimization involves systematic chemical modification of a
promising compound to improve potency, selectivity, pharmacokinetic
properties, and safety. Option B concerns medication distribution to
patients. Option C involves monitoring drug safety after exposure and
Goodman and Gilman's The
Pharmacological Basis of Therapeutics
14th Edition
Author(s)Laurence Brunton; Bjorn Knollmann
Print ISBN: 9781264258079
,Question 1
A researcher isolates a biologically active compound from a medicinal
plant and wants to develop it into a drug lead. What is the most
appropriate description of this compound at this stage?
A. A fully validated therapeutic drug
B. A lead compound requiring further optimization
,C. A final pharmaceutical formulation
D. A pharmacogenomic biomarker
Correct Answer:
B. A lead compound requiring further optimization
Rationale:
A biologically active compound isolated from a natural source may
serve as a lead compound, but it generally requires optimization for
potency, selectivity, pharmacokinetics, safety, and drug-like properties
before becoming a drug. Option A is incorrect because biological
activity alone does not establish a compound as an approved
therapeutic. Option C is incorrect because formulation occurs after the
drug candidate has been sufficiently characterized. Option D is incorrect
because a biomarker is a measurable biological indicator, not
necessarily a therapeutic compound.
Question 2
Which property of medicinal plants has historically made them
important sources for drug discovery?
A. They contain only compounds with predictable toxicity
B. They provide structurally diverse molecules with biological activity
C. They eliminate the need for synthetic chemistry
D. They guarantee high oral bioavailability of active compounds
Correct Answer:
B. They provide structurally diverse molecules with biological activity
, Rationale:
Plants can produce chemically diverse natural products that interact
with biological targets, making them valuable sources of drug leads.
Option A is incorrect because plant-derived compounds can have
significant toxicity. Option C is incorrect because synthetic chemistry is
often required to optimize natural-product leads. Option D is incorrect
because many natural products have poor absorption, metabolism, or
other pharmacokinetic limitations.
Question 3
A compound isolated from a plant produces a desired pharmacological
effect, but its potency is too low for practical therapeutic use. Which
process is most directly intended to improve this characteristic while
retaining useful biological activity?
A. Lead optimization
B. Drug dispensing
C. Pharmacovigilance
D. Postmarketing surveillance
Correct Answer:
A. Lead optimization
Rationale:
Lead optimization involves systematic chemical modification of a
promising compound to improve potency, selectivity, pharmacokinetic
properties, and safety. Option B concerns medication distribution to
patients. Option C involves monitoring drug safety after exposure and
