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Pick the best form of microscopy to use in each situation, each answer used only once: You want to figure out if a bacterium can swim in a liquid medium You want to visualize the repeating crystalline structure of the S-layer You want to identify the basic cell wall structure of an unknown bacterium You want to watch proteins of the divisome to see how they change their location in dividing cells You want to visualize a single membrane protein complex on the surface of a cell [Choose ] Electron microscopy Light microscopy (with stain [Choose ] V Fluorescence microscopy [Choose ] Phase-contrast microscopy Fluorescence microscopy Atomic Force Microscopy Electron microscopy Light microscopy (with staining)

Let's say that you're a scientist trying to analyze newly sequenced bacterial DNA genomes from an environmental sample of rainforest soil, and your first task is to organize all of the genomes you find into a phylogenetic tree. If you couldn't use the 16S rRNA gene sequence to create the tree, which of these alternative genes would work best for your task of creating a tree for all the bacteria in your sample? O The first gene in the histidine biosynthesis pathway The gene for DNA polymerase core enzyme The first gene in the LPS synthesis pathway The gene for Bacteriochlorophyll A

A bacterial culture that has been pretreated with penicillin to inhibit its peptidoglycan synthesis is split and put into solutions of various concentrations. The same is done with a control culture with no prior penicillin exposure. Which condition is likely to demonstrate the biggest difference in outcomes between the control culture and the experimental culture? O Placing the cultures into a hypertonic solution Placing the cultures into a hypotonic solution O The control and experimental cultures should show you the same results in every condition O Placing the cultures into an isotonic solution