M&b Lagging Microbiology Question?

Microbiology question? - m&b lagging

1.) at 4:00 Clock was a closed bottle of sterile broth inoculated with 10,000 cells. The latent phase lasts for 1 hours. At 9:00 Clock is the culture in the stationary phase, with a population of 65 million cells. How much clock is the upper half of the population?

a. 6:30 pm

b. 7:20 pm

c. 8:20 pm

d. 8:40 pm

2.) What type of sterilization uses the size of organisms?

a. Autoclave

b. Flame

c. Use of chemicals

d. filtration

3.) Which of the following statements is most effective against resistant endospores?

a. Autoclave

b. Boiling Point

c. Pasteurization

d. All are equally effective against resistant endospores.





Please help me with these questions. Thanks in advance