বহুনির্বাচনি (MCQ)
১. The standard autoclave cycle for sterilisation is:
ক) 100°C for 30 minutes
খ) 121°C for 15 minutes at 15 lb/sq inch
গ) 160°C for 1 hour
ঘ) 63°C for 30 minutes
ঙ) 134°C for 1 second
উত্তর দেখুন
সঠিক উত্তর: খ) 121°C for 15 minutes at 15 lb/sq inch
ব্যাখ্যা: Moist heat at 121°C under 15 lb/sq inch pressure for 15 minutes kills spores. Hot air oven: 160°C for 2 hours; 63°C for 30 minutes is pasteurisation (holder method).
📖 রেফারেন্স: Ananthanarayan & Paniker's Textbook of Microbiology · Sterilisation and disinfection