18) Many bacteria produce proteins that inhibit or kill closely related species
ID: 133444 • Letter: 1
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18) Many bacteria produce proteins that inhibit or kill closely related species or even different strains of the same species these proteins are called A) catalases B) transferrins D) aerobactins 19) In which of the following mating, do you expect the transfer of the chromosomal DNA? 20) Which of the following is an intracellular parasite? A) Bacilhes B) Mycnbacterin C) Rickettsia 21) Like rhizobia_invades plants. invades plants. However, it does not induce root nodules or fix nitrogen but instead causes a tumor-like disease B) Bordetella perfussis C) Pelagibacter whique D) Rickettsia prowazekar 22) An evacuation has been ordered for an area north of Los Angeles a couple of years ago after one squirrel tested positive for the plague, which was caused by A) Y. enterocolitica B) Neisseria gonorrhes C) Vibrio cholerae D) Yersinid pestis E) E coiO0157 H7 23) Which of the following pairs is NOT correctly matched? A) bacillary dysentery-Shigella B) Bordetella pertussis-whooping cough C) Haemopiilus influenzae -typhoid fever D) Vibrio cholerae rice stool diarrhea E) Salmonella Typhimurium-Salmonellosis 24) Which is NOT considered as a member of enterics? dhrchia D) Shigella A) Salmonella B) Klebsiclla E) VibrioExplanation / Answer
18) The correct option is D. Bacteriocins.
Proteins produced by most bacteria, which inhibit or kill closely related species and different strains of the same species.
19) The correct option is C. Hfr X F-.
Hfr cell is a bacterium with a conjugative plasmid such as the F-factor that is integrated into its chromosomal DNA.
20) The correct option is C. Rickettsia.
The rickettsia are obligate intracellular parasites. They have the common characteristics, which are spread by arthropod vectors.
21) The correct option is E. Agrobacterium tumefaciens.
Agrobacterium tumefaciens forms a parasitic symbiosis with plants, that causes crown gall disease. Crown gall is plant tumor, which is induced by this species.
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