Questlions 15-20: True or Polse. For these que domage brain tissue in animals by

Question

Questlions 15-20: True or Polse. For these que domage brain tissue in animals by inducing cell lysis 15. Prions acids ocrs involves the transfer of nuclele ocids 16. In prokoryotes, genetic exchange via tr mating bridge e via transcduction pply of certal enzymes becouse host cells lack need to change rapidly in order to respond to changes in replicote the viral 12, RNA viruses require their own supply of certaln enz replicote the viral genome. 18. In bocterio, genetic traits thot are usually located in plasmids change rap genetic variation. 19. In prokaryotes, meiosis is one of the mechonisms that con enhance 20. Prokaryotic genomes are composed of circular DNA 21. Which of the following statements is TRUE about proteobacteria? a) They have a thick peptidoglycan cell wall. b) They lack flagellae. c) The have an outer lipopolysaccharide membrane. d) Very few are pathogenic e) None of the statements ore true about proteobacteria 22. Assuming that each of these possesses a cell wall, which prokaryotes should be expected to be most strongly resistant to cell destruction in hypertonic environments? a) extreme thermophiles b) extreme halophiles c) nitrogen-fixing bacteria that live in root nodules d) methanogens e) cyanobacteria 23. Which of the following is problematic when the goal is to construct phylogenies that accurately refe a) Polyphyletic groups b) Paraphyletic groups c) Monophyletic groups d) Two of the responses are correct. e) None of the above. 24. Some molecular data place the giant panda in the bear family (Ursidae) but place the lesser p the distantly related raccoon family (Procyonidae). Consequently, the morphological similarities of two species are probably due to a) Inheritance of acquired characteristics. b) Sexual selection. d) Possession of structures that have arisen via convergence. d) Inheritance of shared derived characteristics. e) Possession of shared ancestral characteristics

Explanation / Answer

Ans 1:- (option C is true)

#reason :-proteobacteria is a gram negative bacteria and have an outer lipopoysacaride membrane.

Ans2:- (option is true)

#reason:-

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