Microbial Growth, Metabolism, and Antimicrobial Control: Study Notes

A microbiologist is culturing bacteria in a test tube of thioglycollate broth. After incubation, most of the bacterial growth is observed at the very top of the tube, with little to no growth below the surface. Which classification best describes these bacteria?

Which of the following biomolecules is nitrogen MOST essential for the synthesis of in living cells?

A bacterial culture has a generation time of 30 minutes. If you start with 1,000 cells, how many cells will there be after 3 hours of exponential growth? Use the formula $N = N_0 \times 2^n$, where $n$ is the number of generations.