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 discovery approach provided the foundation for many early
medicines derived directly from medicinal plants?
A. Molecular dynamics simulation
B. Isolation and characterization of active natural products
C. Virtual screening of synthetic libraries
D. Computer-generated de novo molecule design
,Correct Answer: B. Isolation and characterization of active natural
products
Rationale:
B is correct because early drug discovery frequently involved identifying
plants with therapeutic effects, extracting their constituents, and
isolating the compounds responsible for biological activity. This
transformed an empirically useful remedy into a chemically defined
substance that could be studied and developed.
A is incorrect because molecular dynamics is a modern computational
method used to study molecular behavior rather than the basis of early
plant-derived drug discovery.
C is incorrect because virtual screening developed much later with
advances in computational chemistry and molecular modeling.
D is incorrect because de novo design is a computer-aided strategy that
emerged long after systematic investigation of medicinal plants.
Question 2
A researcher isolates a purified compound from a medicinal plant and
determines that the compound produces the desired biological effect.
What is the most appropriate term for this compound at this stage of
discovery?
A. Lead compound
B. Final therapeutic product
C. Biomarker
D. Formulation excipient
Correct Answer: A. Lead compound
, Rationale:
A is correct because an isolated compound with reproducible biological
activity can serve as a starting point for further optimization. A lead
provides a chemical scaffold that can be modified to improve potency,
selectivity, pharmacokinetics, and safety.
B is incorrect because biological activity alone does not establish that a
compound is ready for clinical use.
C is incorrect because a biomarker is a measurable indicator of a
biological or disease-related process, not a candidate drug molecule
itself.
D is incorrect because an excipient is an inactive formulation ingredient
rather than the pharmacologically active compound.
Question 3
Why are natural products historically important in drug discovery?
A. They eliminate the need for chemical optimization
B. They provide structurally diverse molecules with biologically relevant
activities
C. They are always safer than synthetic compounds
D. They can be used clinically without purification
Correct Answer: B. They provide structurally diverse molecules with
biologically relevant activities
Rationale:
B is correct because plants and other natural sources produce
chemically diverse molecules that interact with biological systems and
can provide useful starting scaffolds for drug discovery. Their structural
Goodman and Gilman's The
Pharmacological Basis of Therapeutics
14th Edition
Author(s)Laurence Brunton; Bjorn Knollmann
Print ISBN: 9781264258079
,Question 1
Which discovery approach provided the foundation for many early
medicines derived directly from medicinal plants?
A. Molecular dynamics simulation
B. Isolation and characterization of active natural products
C. Virtual screening of synthetic libraries
D. Computer-generated de novo molecule design
,Correct Answer: B. Isolation and characterization of active natural
products
Rationale:
B is correct because early drug discovery frequently involved identifying
plants with therapeutic effects, extracting their constituents, and
isolating the compounds responsible for biological activity. This
transformed an empirically useful remedy into a chemically defined
substance that could be studied and developed.
A is incorrect because molecular dynamics is a modern computational
method used to study molecular behavior rather than the basis of early
plant-derived drug discovery.
C is incorrect because virtual screening developed much later with
advances in computational chemistry and molecular modeling.
D is incorrect because de novo design is a computer-aided strategy that
emerged long after systematic investigation of medicinal plants.
Question 2
A researcher isolates a purified compound from a medicinal plant and
determines that the compound produces the desired biological effect.
What is the most appropriate term for this compound at this stage of
discovery?
A. Lead compound
B. Final therapeutic product
C. Biomarker
D. Formulation excipient
Correct Answer: A. Lead compound
, Rationale:
A is correct because an isolated compound with reproducible biological
activity can serve as a starting point for further optimization. A lead
provides a chemical scaffold that can be modified to improve potency,
selectivity, pharmacokinetics, and safety.
B is incorrect because biological activity alone does not establish that a
compound is ready for clinical use.
C is incorrect because a biomarker is a measurable indicator of a
biological or disease-related process, not a candidate drug molecule
itself.
D is incorrect because an excipient is an inactive formulation ingredient
rather than the pharmacologically active compound.
Question 3
Why are natural products historically important in drug discovery?
A. They eliminate the need for chemical optimization
B. They provide structurally diverse molecules with biologically relevant
activities
C. They are always safer than synthetic compounds
D. They can be used clinically without purification
Correct Answer: B. They provide structurally diverse molecules with
biologically relevant activities
Rationale:
B is correct because plants and other natural sources produce
chemically diverse molecules that interact with biological systems and
can provide useful starting scaffolds for drug discovery. Their structural
