By: Prof. Dr. Fazal Rehman | Last updated: July 27, 2024
Which class of antibiotics is primarily used to treat infections caused by Gram-positive bacteria?
a) Penicillins
b) Aminoglycosides
c) Fluoroquinolones
d) TetracyclinesAnswer: a) Penicillins
Which antibiotic is known for its broad-spectrum activity, including effectiveness against both Gram-positive and Gram-negative bacteria?
a) Vancomycin
b) Amoxicillin
c) Ciprofloxacin
d) ErythromycinAnswer: c) Ciprofloxacin
Which of the following antibiotics is a beta-lactamase inhibitor?
a) Clavulanic acid
b) Azithromycin
c) Doxycycline
d) RifampinAnswer: a) Clavulanic acid
Which class of antibiotics inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit?
a) Macrolides
b) Aminoglycosides
c) Cephalosporins
d) FluoroquinolonesAnswer: b) Aminoglycosides
Which antibiotic is often used as a last-resort treatment for methicillin-resistant Staphylococcus aureus (MRSA)?
a) Vancomycin
b) Penicillin
c) Erythromycin
d) LevofloxacinAnswer: a) Vancomycin
What is the primary mechanism of action of fluoroquinolones?
a) Inhibition of cell wall synthesis
b) Inhibition of protein synthesis
c) Inhibition of DNA gyrase and topoisomerase IV
d) Inhibition of folic acid synthesisAnswer: c) Inhibition of DNA gyrase and topoisomerase IV
Which of the following antibiotics is used to treat tuberculosis (TB)?
a) Isoniazid
b) Ciprofloxacin
c) Azithromycin
d) CephalexinAnswer: a) Isoniazid
Which antibiotic is known for its association with the risk of tendon rupture, particularly in the elderly?
a) Doxycycline
b) Penicillin
c) Ciprofloxacin
d) VancomycinAnswer: c) Ciprofloxacin
Which of the following is a common side effect of tetracycline antibiotics?
a) Photosensitivity
b) Nephrotoxicity
c) Ototoxicity
d) HepatotoxicityAnswer: a) Photosensitivity
Which antibiotic is used to treat infections caused by anaerobic bacteria?
a) Metronidazole
b) Rifampin
c) Amoxicillin
d) GentamicinAnswer: a) Metronidazole
Which class of antibiotics includes drugs like azithromycin and erythromycin?
a) Macrolides
b) Lincosamides
c) Cephalosporins
d) CarbapenemsAnswer: a) Macrolides
What is the primary mechanism of action of sulfonamides?
a) Inhibition of bacterial cell wall synthesis
b) Inhibition of bacterial protein synthesis
c) Inhibition of folic acid synthesis
d) Inhibition of DNA replicationAnswer: c) Inhibition of folic acid synthesis
Which antibiotic is commonly used to treat urinary tract infections (UTIs) due to its high renal concentration?
a) Nitrofurantoin
b) Vancomycin
c) Doxycycline
d) LevofloxacinAnswer: a) Nitrofurantoin
Which antimicrobial agent is known to cause discoloration of teeth in children when used during tooth development?
a) Tetracycline
b) Penicillin
c) Vancomycin
d) RifampinAnswer: a) Tetracycline
Which of the following drugs is a carbapenem antibiotic?
a) Meropenem
b) Ceftriaxone
c) Azithromycin
d) VancomycinAnswer: a) Meropenem
