Microbiology Answers

If you inoculate 1*10^6 CFU/ml E.coli, assuming a population doubling time of 20 minutes. Calculate the total number of cells present in a 100 ml flask of LB broth after 6 hours.

Can a retrovirus survive the ph of stomach acid if HIV is usually transmitted through blood? I'm trying to understand how the first people were infected. They say it was from consuming meat from monkeys. I immediately think is it zootonic? So are we saying HIV is not only blood-borne, but could also be food-borne? If viral pathogens aren't alive, how can they be pathogenic?

What are the mechanisms by which antibiotics kill or inhibit microbial growth ?

Why are miRNA binding sites located in the 3' UTR and not in the 5' UTR? What would happen if we move it from 3' UTR to 5' UTR ?

Two scenarios:
1. If you have a bacterial cell in a salty environment then transfer to fresh water What structure prevents the cell from rupture?
2. What bacterial cell do you find peptidoglycan?

Which 2 of the 3 are more closely related?
Archae, bacteria, eukarya

What kind of microscopes do you use for these different Scenarios

1. Bacteria species determine the nature and structure of a number of intracellular inclusions?

2. Bacterial species determine shape, distribution, arrangements of filaments structures protruding from cell surface?

How would you put these in order from smallest to largest, Ebola virus, rhino virus, RBC, yeast cell, squamous epithelial cell, staphylococcus

how do u prevent food spoilage from listeria and how/why it works/?

what is the effect on humans when food is contaminated with listeria on it?