BIO301 | BIO301 Pharmacology Exam 4 Version 1 |
Questions with Correct Answers and Expert
Explanation for Each Question | Saint Paul’s School
of Nursing
1. A patient is prescribed Penicillin G for a streptococcal infection. What is the primary
mechanism of action for this antibiotic?
A. Inhibition of protein synthesis by binding to the 50S ribosome
B. Interference with bacterial cell wall synthesis by inhibiting transpeptidase
C. Inhibition of DNA gyrase needed for replication
D. Disruption of the bacterial cytoplasmic membrane
Correct Answer: B
Expert Explanation: Penicillins are classified as beta-lactam antibiotics that target
the cell wall. They work by binding to penicillin-binding proteins (PBPs), specifically
inhibiting the transpeptidase enzyme. This action prevents the cross-linking of
peptidoglycan strands, which is essential for cell wall stability. Without a strong
wall, the bacteria undergo osmotic lysis and die. This bactericidal effect is most
potent against organisms that are actively growing and dividing.
2. While administering Vancomycin intravenously, the nurse notes the patient’s face
and neck have become bright red and itchy. What is the nurse’s priority action?
A. Slow the infusion rate and assess for hypotension
,B. Stop the infusion and notify the provider immediately
C. Administer an immediate dose of epinephrine
D. Apply cold compresses to the affected areas
Correct Answer: A
Expert Explanation: This reaction is known as Red Man Syndrome, which is a
common infusion-related reaction rather than a true allergy. It is caused by the
rapid release of histamine when Vancomycin is infused too quickly. The standard
nursing intervention is to slow the infusion rate to at least 60 minutes or more. The
nurse should also monitor the patient’s blood pressure, as rapid infusion can cause
significant hypotension. True anaphylaxis would require different interventions like
epinephrine, but this localized flushing is typically managed by rate adjustment.
3. Which lab value is most important for the nurse to monitor in a patient receiving
Gentamicin (an aminoglycoside)?
A. Serum Creatinine
B. Serum Potassium
C. Prothrombin Time (PT)
D. Hemoglobin and Hematocrit
Correct Answer: A
,Expert Explanation: Aminoglycosides like Gentamicin are notoriously nephrotoxic
and ototoxic. Serum creatinine and Blood Urea Nitrogen (BUN) levels must be
monitored to assess renal function during therapy. An increase in creatinine often
indicates early stages of kidney damage caused by the drug. Because these drugs are
excreted renally, impaired function can lead to toxic accumulation. Nurses must
ensure the patient remains well-hydrated to minimize the risk of tubular necrosis.
4. A 22-year-old female patient is prescribed Tetracycline for acne. What is the most
important education the nurse should provide regarding this medication?
A. Take the medication with a glass of milk to prevent GI upset
B. Expect your urine to turn a dark orange color
C. Use a backup form of contraception if taking oral contraceptives
D. Decrease fluid intake to avoid frequent urination
Correct Answer: C
Expert Explanation: Tetracyclines can significantly decrease the effectiveness of
oral contraceptive pills, increasing the risk of unintended pregnancy. Patients
should be advised to use a non-hormonal barrier method while on antibiotic
therapy. Additionally, this drug is contraindicated in pregnancy due to its effects on
fetal bone and tooth development. It should not be taken with dairy products
, because calcium binds to the drug and prevents absorption. Photosensitivity is
another side effect that requires patient education regarding sun protection.
5. A patient diagnosed with tuberculosis is started on Rifampin. Which statement by
the patient indicates an understanding of the side effects?
A. I will call the doctor if I develop a ringing in my ears
B. I will need to take Vitamin B6 to prevent nerve damage
C. I should not be surprised if my sweat and tears turn orange
D. This medication will help me sleep better at night
Correct Answer: C
Expert Explanation: Rifampin is known to cause a benign discoloration of body
fluids, including urine, sweat, saliva, and tears. The color typically appears orange-
red and can permanently stain contact lenses. This is a normal side effect of the drug
and does not indicate a medical emergency. However, Rifampin is also hepatotoxic,
so patients should be monitored for jaundice. Vitamin B6 is used with Isoniazid
(INH), not Rifampin, to prevent peripheral neuropathy.
6. Which antimicrobial agent is the drug of choice for treating Clostridioides difficile
(C. diff) infection?
A. Intravenous Vancomycin
B. Oral Amoxicillin
Questions with Correct Answers and Expert
Explanation for Each Question | Saint Paul’s School
of Nursing
1. A patient is prescribed Penicillin G for a streptococcal infection. What is the primary
mechanism of action for this antibiotic?
A. Inhibition of protein synthesis by binding to the 50S ribosome
B. Interference with bacterial cell wall synthesis by inhibiting transpeptidase
C. Inhibition of DNA gyrase needed for replication
D. Disruption of the bacterial cytoplasmic membrane
Correct Answer: B
Expert Explanation: Penicillins are classified as beta-lactam antibiotics that target
the cell wall. They work by binding to penicillin-binding proteins (PBPs), specifically
inhibiting the transpeptidase enzyme. This action prevents the cross-linking of
peptidoglycan strands, which is essential for cell wall stability. Without a strong
wall, the bacteria undergo osmotic lysis and die. This bactericidal effect is most
potent against organisms that are actively growing and dividing.
2. While administering Vancomycin intravenously, the nurse notes the patient’s face
and neck have become bright red and itchy. What is the nurse’s priority action?
A. Slow the infusion rate and assess for hypotension
,B. Stop the infusion and notify the provider immediately
C. Administer an immediate dose of epinephrine
D. Apply cold compresses to the affected areas
Correct Answer: A
Expert Explanation: This reaction is known as Red Man Syndrome, which is a
common infusion-related reaction rather than a true allergy. It is caused by the
rapid release of histamine when Vancomycin is infused too quickly. The standard
nursing intervention is to slow the infusion rate to at least 60 minutes or more. The
nurse should also monitor the patient’s blood pressure, as rapid infusion can cause
significant hypotension. True anaphylaxis would require different interventions like
epinephrine, but this localized flushing is typically managed by rate adjustment.
3. Which lab value is most important for the nurse to monitor in a patient receiving
Gentamicin (an aminoglycoside)?
A. Serum Creatinine
B. Serum Potassium
C. Prothrombin Time (PT)
D. Hemoglobin and Hematocrit
Correct Answer: A
,Expert Explanation: Aminoglycosides like Gentamicin are notoriously nephrotoxic
and ototoxic. Serum creatinine and Blood Urea Nitrogen (BUN) levels must be
monitored to assess renal function during therapy. An increase in creatinine often
indicates early stages of kidney damage caused by the drug. Because these drugs are
excreted renally, impaired function can lead to toxic accumulation. Nurses must
ensure the patient remains well-hydrated to minimize the risk of tubular necrosis.
4. A 22-year-old female patient is prescribed Tetracycline for acne. What is the most
important education the nurse should provide regarding this medication?
A. Take the medication with a glass of milk to prevent GI upset
B. Expect your urine to turn a dark orange color
C. Use a backup form of contraception if taking oral contraceptives
D. Decrease fluid intake to avoid frequent urination
Correct Answer: C
Expert Explanation: Tetracyclines can significantly decrease the effectiveness of
oral contraceptive pills, increasing the risk of unintended pregnancy. Patients
should be advised to use a non-hormonal barrier method while on antibiotic
therapy. Additionally, this drug is contraindicated in pregnancy due to its effects on
fetal bone and tooth development. It should not be taken with dairy products
, because calcium binds to the drug and prevents absorption. Photosensitivity is
another side effect that requires patient education regarding sun protection.
5. A patient diagnosed with tuberculosis is started on Rifampin. Which statement by
the patient indicates an understanding of the side effects?
A. I will call the doctor if I develop a ringing in my ears
B. I will need to take Vitamin B6 to prevent nerve damage
C. I should not be surprised if my sweat and tears turn orange
D. This medication will help me sleep better at night
Correct Answer: C
Expert Explanation: Rifampin is known to cause a benign discoloration of body
fluids, including urine, sweat, saliva, and tears. The color typically appears orange-
red and can permanently stain contact lenses. This is a normal side effect of the drug
and does not indicate a medical emergency. However, Rifampin is also hepatotoxic,
so patients should be monitored for jaundice. Vitamin B6 is used with Isoniazid
(INH), not Rifampin, to prevent peripheral neuropathy.
6. Which antimicrobial agent is the drug of choice for treating Clostridioides difficile
(C. diff) infection?
A. Intravenous Vancomycin
B. Oral Amoxicillin
