Question

Ciprofloxacin belongs to which chemical class?

• A. Sulphonamides
• B. Fluoroquinolones
• C. Cephalosporins
• D. Macrolides

Hint:

Ciprofloxacin, norfloxacin, and levofloxacin are examples of fluoroquinolone antibiotics.

Answer 1

The Correct Option is B

Concept:
Ciprofloxacin is a broad-spectrum antibacterial drug.

Step 1: Chemical class.
Ciprofloxacin belongs to the fluoroquinolone class of antibiotics.

Step 2: Mechanism of action.
Fluoroquinolones inhibit bacterial DNA gyrase and topoisomerase IV. These enzymes are required for bacterial DNA replication.

Step 3: Importance of fluoro group.
The presence of fluorine in the quinolone structure improves antibacterial activity and spectrum.

Step 4: Checking other options.
Sulphonamides inhibit folic acid synthesis.
Cephalosporins are \(\beta\)-lactam antibiotics.
Macrolides inhibit bacterial protein synthesis.
Ciprofloxacin is a fluoroquinolone.

Step 5: Final answer.
Therefore, ciprofloxacin belongs to fluoroquinolones. \[ \boxed{\text{Fluoroquinolones}} \]