NUR2474
Pharmacology
COMPLETED EXAM w/
RATIONALES
2024
,1. Which of the following statements accurately describes
pharmacogenetics?
a) It refers to the study of how genetic differences influence
an individual's response to medications.
b) It involves the study of how the environment affects the
efficacy of medications.
c) It focuses on the development of new pharmaceutical
drugs based on genetic factors.
d) It investigates the side effects of medications on
different populations.
Answer: a) It refers to the study of how genetic differences
influence an individual's response to medications.
Rationale: Pharmacogenetics explores the genetic
variations that affect an individual's response to drugs,
allowing for personalized medicine based on genetic
makeup.
2. Cytochrome P450 enzymes are the most significant
enzymes involved in drug metabolism. Which of the
following CYP enzymes is responsible for metabolizing
approximately half of all medications?
a) CYP1A2
b) CYP2C9
c) CYP2D6
d) CYP3A4
, Answer: d) CYP3A4
Rationale: CYP3A4 is responsible for metabolizing
approximately 50% of medications, making it the most
crucial enzyme in drug metabolism.
3. A patient who carries genetic polymorphisms in the
CYP2D6 gene is likely to exhibit:
a) Increased enzymatic activity, necessitating a higher
dosage of medications.
b) Decreased enzymatic activity, requiring a lower dosage
of medications.
c) No effect on enzymatic activity or medication dosage.
d) Increased drug tolerance, resulting in a decreased dosage
requirement.
Answer: b) Decreased enzymatic activity, requiring a lower
dosage of medications.
Rationale: Genetic polymorphisms in the CYP2D6 gene
lead to reduced enzymatic activity, resulting in slower drug
metabolism and the need for lower medication dosages.
4. Which of the following medications requires genetic
testing prior to administration due to pharmacogenetic
differences?
Pharmacology
COMPLETED EXAM w/
RATIONALES
2024
,1. Which of the following statements accurately describes
pharmacogenetics?
a) It refers to the study of how genetic differences influence
an individual's response to medications.
b) It involves the study of how the environment affects the
efficacy of medications.
c) It focuses on the development of new pharmaceutical
drugs based on genetic factors.
d) It investigates the side effects of medications on
different populations.
Answer: a) It refers to the study of how genetic differences
influence an individual's response to medications.
Rationale: Pharmacogenetics explores the genetic
variations that affect an individual's response to drugs,
allowing for personalized medicine based on genetic
makeup.
2. Cytochrome P450 enzymes are the most significant
enzymes involved in drug metabolism. Which of the
following CYP enzymes is responsible for metabolizing
approximately half of all medications?
a) CYP1A2
b) CYP2C9
c) CYP2D6
d) CYP3A4
, Answer: d) CYP3A4
Rationale: CYP3A4 is responsible for metabolizing
approximately 50% of medications, making it the most
crucial enzyme in drug metabolism.
3. A patient who carries genetic polymorphisms in the
CYP2D6 gene is likely to exhibit:
a) Increased enzymatic activity, necessitating a higher
dosage of medications.
b) Decreased enzymatic activity, requiring a lower dosage
of medications.
c) No effect on enzymatic activity or medication dosage.
d) Increased drug tolerance, resulting in a decreased dosage
requirement.
Answer: b) Decreased enzymatic activity, requiring a lower
dosage of medications.
Rationale: Genetic polymorphisms in the CYP2D6 gene
lead to reduced enzymatic activity, resulting in slower drug
metabolism and the need for lower medication dosages.
4. Which of the following medications requires genetic
testing prior to administration due to pharmacogenetic
differences?
