The presence of fimbriae on a bacterial cell is most likely to have a critical role in

• A. Conjugation
• B. Chemotaxis
• C. Biofilm formation
• D. DNA replication

Answer: (C)

Verified step by step guidance

1. Understand the function of fimbriae: Fimbriae are hair-like appendages on the surface of bacterial cells that are primarily involved in adhesion to surfaces, which is crucial for biofilm formation.
2. Differentiate between the given options: Conjugation involves the transfer of DNA between bacteria, chemotaxis is the movement of an organism in response to a chemical stimulus, and biofilm formation involves the aggregation of bacteria on a surface.
3. Analyze the role of fimbriae in each process: Fimbriae are not directly involved in conjugation or chemotaxis, but they play a significant role in biofilm formation by allowing bacteria to adhere to surfaces and to each other.
4. Consider the biological significance: Biofilms provide a protective environment for bacteria, enhancing their survival and resistance to environmental stresses, which is facilitated by the presence of fimbriae.
5. Conclude the analysis: Based on the function of fimbriae and their role in adhesion, the presence of fimbriae on a bacterial cell is most likely to have a critical role in biofilm formation.