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True/ Palse (correct the false answer) 1. When there is no arabinose availabie e in the envirotiment, the ArzC protein acts an ie 2. A collection of genes or operons controlled by a cominon regulatory protein is called a regulator. 3. The trp repressor blocks transcription of the trp operon when the repressoe binss to the inducer. 4. Oxygen is required for the regeneration of NAD+ from NADH. 5. The TCA cyele occurs on the mitochondrial membrane in bacteria. 6. Organisms that form lactate, acetate, ethanol, and CO2 as end products of glocore metabolism are called mixed acid fermenters. 7. Penicillin, cephalosporins, carbapenems and glycopeptides are all cell wall inhibitors. 8. Quinolones and cephalosporins inhibit protcin synthesis. 9. The genes encoding for resistance may be located cither on the bacterial chromosome or on an extrachromosomal element or plasmid, and bacteria could develop resistance to multiple antibiotics. 10. Resistance to -lactam could be related to production of one or various -lactamases and efflux of the antibiotic through efflux channels. 11. The host range of a virus is determined by whether its nucleic acid is DNA or RNA. 12. Viruses manufacture their own ATP. proteins, and nucleic acids. 13. Viruses are nonliving because DNA does not cncode proteins. 14. Effective antiviral drugs are usually associated with removal of viral mRNAs