PHARMD – DOCTOR OF PHARMACY | EXAM QUESTIONS AND
CORRECT ANSWERS | LATEST VERSION 2026/2027
PHARMD - DOCTOR OF PHARMACY
1. Which organ is the primary site of drug metabolism?
A. Kidney
B. Liver
C. Heart
D. Spleen
Answer: B. Liver
Explanation: The liver contains major drug-metabolizing enzymes,
particularly the cytochrome P450 system.
2. What is bioavailability?
A. Rate of renal excretion
B. Fraction of an administered dose reaching systemic circulation
unchanged
C. Degree of protein binding
D. Volume of distribution
Answer: B. Fraction of an administered dose reaching systemic
circulation unchanged
Explanation: Bioavailability describes how much of an administered drug
reaches systemic circulation in an unchanged form.
3. Which route of administration generally provides 100%
bioavailability?
,A. Oral
B. Subcutaneous
C. Intravenous
D. Rectal
Answer: C. Intravenous
Explanation: IV administration places the drug directly into systemic
circulation, giving complete bioavailability.
4. Which pharmacokinetic parameter describes the extent of drug
distribution into tissues?
A. Clearance
B. Half-life
C. Volume of distribution
D. Bioavailability
Answer: C. Volume of distribution
Explanation: Volume of distribution relates the amount of drug in the
body to its plasma concentration.
5. What does drug half-life represent?
A. Time required for absorption to begin
B. Time required for plasma concentration to decrease by 50%
C. Time required for metabolism to stop
D. Time required to reach maximum concentration
Answer: B. Time required for plasma concentration to decrease by
50%
Explanation: Half-life is the time needed for the drug concentration or
amount in the body to fall by half.
6. Which enzyme family is responsible for metabolism of many
drugs?
A. DNA polymerase
B. Cytochrome P450
C. RNA polymerase
D. Amylase
Answer: B. Cytochrome P450
Explanation: CYP enzymes perform many Phase I oxidative drug-
metabolism reactions.
7. Which organ is primarily responsible for drug excretion?
A. Kidney
B. Pancreas
,C. Thyroid
D. Lung
Answer: A. Kidney
Explanation: The kidneys eliminate many drugs and metabolites through
glomerular filtration, secretion, and reabsorption.
8. A drug that binds to a receptor and produces a maximal response
is called a:
A. Competitive antagonist
B. Partial agonist
C. Full agonist
D. Inverse agonist
Answer: C. Full agonist
Explanation: A full agonist activates its receptor and can produce the
maximum response associated with that receptor.
9. Which term describes the ability of a drug to bind to its receptor?
A. Efficacy
B. Affinity
C. Clearance
D. Potency
Answer: B. Affinity
Explanation: Affinity refers to the strength or tendency of a drug to bind
to its receptor.
10. Which term describes the maximum effect a drug can produce?
A. Efficacy
B. Affinity
C. Absorption
D. Distribution
Answer: A. Efficacy
Explanation: Efficacy describes the maximal pharmacologic effect
achievable with a drug.
11. Which drug class is commonly used as a first-line treatment for
bacterial infections?
A. Antibiotics
B. Antivirals
C. Antifungals
D. Antineoplastics
Answer: A. Antibiotics
, Explanation: Antibiotics are drugs used to treat infections caused by
susceptible bacteria.
12. Which antibiotic class inhibits bacterial cell-wall synthesis?
A. Penicillins
B. Macrolides
C. Fluoroquinolones
D. Tetracyclines
Answer: A. Penicillins
Explanation: Penicillins inhibit bacterial transpeptidases involved in
peptidoglycan cross-linking.
13. Which antibiotic is a macrolide?
A. Azithromycin
B. Amoxicillin
C. Ciprofloxacin
D. Vancomycin
Answer: A. Azithromycin
Explanation: Azithromycin is a macrolide that inhibits bacterial protein
synthesis by binding the 50S ribosomal subunit.
14. Which antibiotic class inhibits bacterial DNA gyrase or
topoisomerase IV?
A. Fluoroquinolones
B. Penicillins
C. Glycopeptides
D. Macrolides
Answer: A. Fluoroquinolones
Explanation: Fluoroquinolones interfere with bacterial DNA replication
through inhibition of DNA gyrase and/or topoisomerase IV.
15. Which drug is classified as a tetracycline?
A. Doxycycline
B. Ceftriaxone
C. Clindamycin
D. Metronidazole
Answer: A. Doxycycline
Explanation: Doxycycline is a tetracycline antibiotic that inhibits bacterial
protein synthesis.
16. Which antibiotic is associated with nephrotoxicity and
ototoxicity?
CORRECT ANSWERS | LATEST VERSION 2026/2027
PHARMD - DOCTOR OF PHARMACY
1. Which organ is the primary site of drug metabolism?
A. Kidney
B. Liver
C. Heart
D. Spleen
Answer: B. Liver
Explanation: The liver contains major drug-metabolizing enzymes,
particularly the cytochrome P450 system.
2. What is bioavailability?
A. Rate of renal excretion
B. Fraction of an administered dose reaching systemic circulation
unchanged
C. Degree of protein binding
D. Volume of distribution
Answer: B. Fraction of an administered dose reaching systemic
circulation unchanged
Explanation: Bioavailability describes how much of an administered drug
reaches systemic circulation in an unchanged form.
3. Which route of administration generally provides 100%
bioavailability?
,A. Oral
B. Subcutaneous
C. Intravenous
D. Rectal
Answer: C. Intravenous
Explanation: IV administration places the drug directly into systemic
circulation, giving complete bioavailability.
4. Which pharmacokinetic parameter describes the extent of drug
distribution into tissues?
A. Clearance
B. Half-life
C. Volume of distribution
D. Bioavailability
Answer: C. Volume of distribution
Explanation: Volume of distribution relates the amount of drug in the
body to its plasma concentration.
5. What does drug half-life represent?
A. Time required for absorption to begin
B. Time required for plasma concentration to decrease by 50%
C. Time required for metabolism to stop
D. Time required to reach maximum concentration
Answer: B. Time required for plasma concentration to decrease by
50%
Explanation: Half-life is the time needed for the drug concentration or
amount in the body to fall by half.
6. Which enzyme family is responsible for metabolism of many
drugs?
A. DNA polymerase
B. Cytochrome P450
C. RNA polymerase
D. Amylase
Answer: B. Cytochrome P450
Explanation: CYP enzymes perform many Phase I oxidative drug-
metabolism reactions.
7. Which organ is primarily responsible for drug excretion?
A. Kidney
B. Pancreas
,C. Thyroid
D. Lung
Answer: A. Kidney
Explanation: The kidneys eliminate many drugs and metabolites through
glomerular filtration, secretion, and reabsorption.
8. A drug that binds to a receptor and produces a maximal response
is called a:
A. Competitive antagonist
B. Partial agonist
C. Full agonist
D. Inverse agonist
Answer: C. Full agonist
Explanation: A full agonist activates its receptor and can produce the
maximum response associated with that receptor.
9. Which term describes the ability of a drug to bind to its receptor?
A. Efficacy
B. Affinity
C. Clearance
D. Potency
Answer: B. Affinity
Explanation: Affinity refers to the strength or tendency of a drug to bind
to its receptor.
10. Which term describes the maximum effect a drug can produce?
A. Efficacy
B. Affinity
C. Absorption
D. Distribution
Answer: A. Efficacy
Explanation: Efficacy describes the maximal pharmacologic effect
achievable with a drug.
11. Which drug class is commonly used as a first-line treatment for
bacterial infections?
A. Antibiotics
B. Antivirals
C. Antifungals
D. Antineoplastics
Answer: A. Antibiotics
, Explanation: Antibiotics are drugs used to treat infections caused by
susceptible bacteria.
12. Which antibiotic class inhibits bacterial cell-wall synthesis?
A. Penicillins
B. Macrolides
C. Fluoroquinolones
D. Tetracyclines
Answer: A. Penicillins
Explanation: Penicillins inhibit bacterial transpeptidases involved in
peptidoglycan cross-linking.
13. Which antibiotic is a macrolide?
A. Azithromycin
B. Amoxicillin
C. Ciprofloxacin
D. Vancomycin
Answer: A. Azithromycin
Explanation: Azithromycin is a macrolide that inhibits bacterial protein
synthesis by binding the 50S ribosomal subunit.
14. Which antibiotic class inhibits bacterial DNA gyrase or
topoisomerase IV?
A. Fluoroquinolones
B. Penicillins
C. Glycopeptides
D. Macrolides
Answer: A. Fluoroquinolones
Explanation: Fluoroquinolones interfere with bacterial DNA replication
through inhibition of DNA gyrase and/or topoisomerase IV.
15. Which drug is classified as a tetracycline?
A. Doxycycline
B. Ceftriaxone
C. Clindamycin
D. Metronidazole
Answer: A. Doxycycline
Explanation: Doxycycline is a tetracycline antibiotic that inhibits bacterial
protein synthesis.
16. Which antibiotic is associated with nephrotoxicity and
ototoxicity?
