General Microbiology Quiz

Staining Method for Acid-Fast Bacteria

• The Ziehl-Neelsen stain is commonly used to identify acid-fast bacteria, particularly Mycobacterium species.
• This staining method highlights the resistance of these bacteria to decolorization by acids.

Function of Pili in Bacterial Cells

• Pili, also known as fimbriae, facilitate adhesion of bacteria to surfaces or other cells.
• They play a crucial role in the formation of biofilms and can assist in genetic exchange through conjugation.

Chemical Agent for Disinfection of Medical Equipment

• Glutaraldehyde is frequently employed as a disinfecting agent for medical instruments and equipment.
• It is effective against a broad range of bacteria, viruses, and fungi due to its potent aldehyde properties.

Purpose of Agar in Culture Media

• Agar serves as a gelatinous base in culture media, providing a stable environment for microbial growth.
• It allows for the differential culture of microorganisms by enabling the isolation of specific species while inhibiting others.

Physical Agent for Sterilization in the Food Industry

• High-temperature steam, known as autoclaving, is widely used for sterilization in food processing.
• This method ensures the destruction of microbial life by applying heat and pressure, preserving food quality and safety.