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D 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? Placing the cultures into a hypotonic solution O Placing the cultures into an isotonic solution Placing the cultures into a hypertonic solution The control and experimental cultures should show you the same results in every condition 问题9 You are studying a new bacteria isolated from the soil by identifying the cellular structures that it makes. The presence of which of the following would indicate that your organism must be a Gram-negative bacterium? It has an outer membrane with LPS It has a polyhydroxyalkanoate storage granule It has a cell wall with teichoic acids 14 It has a flagella