Why are you the best bacteriology technician for us?

Of course, they know why they want to hire you, you are there for an interview. The interviewer wants to hear the one unique thing that sets you apart from every other candidate who has applied for this position.
We suggest that you ask former co-workers or family members and ask them what they feel is the one unique thing that sets you apart from the other candidates. Their perceptions will help you understand how you are perceived and what makes you the perfect person for the opportunity.

"I've always enjoyed studying the structure and function of human, animal, and plant tissues. My attention to detail and work ethic have been complimented by my supervision and I'm excited to get the chance to display it here."