Questions 15-20: True or False. For these quesl 15. Prions damage brain tissue i
ID: 3165043 • Letter: Q
Question
Questions 15-20: True or False. For these quesl 15. Prions damage brain tissue in animals by inducing cell lysis. the transfer of nucleic a yotes, genetic exchange via transduction involves 16. In prokar mating bridge. t cells lack enzymes that ccn 17. RNA viruses require their own replicate the viral genome. r own supply of certain enzymes because ost cell lack enzymes th ironmenn 18. In boe, genetic traits that need to change rapidly in order are usually located in plasmids 19. In prokaryotes, meiosis is one of the mechanisms that can enhance gen 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 are 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 d 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 refle evolutionary history? 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 pe the distantly related raccoon family (Procyonidae). Consequently, the morphological similarities of t two species are probably due to a) Inheritance of acquired characteristics. b) Sexual selection. c) Possession of structures that have arisen via convergence. d) Inheritance of shared derived characteristics e) Possession of shared ancestral characteristics. 4Explanation / Answer
Answer 15: False. This is because prions cause the misfolding of proteins by protein PrP released by the prions.
ANswer 16: True: mating bridge facilitates the exchange of genetic material in the process of transduction.
Answer 17: False: RNA virus replicate with the help of replication machinary of host.
Answer 18: True: Plasmids carry the gene for antibiotic resistance and other environmental stresses and thus help revive through tyhe adverse environmental stresses.
Answer 19: True: meiosis helps in variation in prokaryotes as well as eukaryotes. Thgis is because, there is a crossing over step in meiosis.
Answer 20: True: Circular closed genome is present in prokaryotes.
Answer 21: The correct statement is:
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