Multiple Choice Questions Flashcards
1
Q
What will give a larger estimate for a population density of an E. coli culture?
- spread plate method
- direct cell counts
- turbidity measurements
- guessing
A
direct cell counts
2
Q
What is not a role of oil immersion at 100X?
- prevention of scratches by the glass slide
- reduce light refraction/loss
- increase the numerical aperture
- decrease limit of resolution
A
prevention of scratches by the glass slide
3
Q
How long does it take UV light to destroy endospores?
A
2 hrs
4
Q
How do you kill endospores with bleach?
A
Use 10% bleach and wet for 15 minutes
5
Q
How do you rid an instrument of potential viruses?
A
autoclaving
6
Q
What mutation does UV light cause?
A
pyrimidine dimers
7
Q
A species whos cells are divided into 2 perpendicular planes will form what kind of cell to cell arrangements?
A
tetrads
8
Q
A
