Which is not true of Streptococcus pneumoniae?
QUESTION 42 Which of the following is not true of viroids? Show more QUESTION 42 Which of the following is not true of viroids? all of the above are true infectious nucleic acid some have catalytic ability low molecular weight naked RNA infect plants and the animals that eat them 2 points QUESTION 43 All of the following are true of prions except: They produce mad cow disease. A prion disease in humans resulted from cannibalism. Prions are difficult to inactivate by conventional chemical/physical means. Prion diseases of animals are not transmissible to humans. They are concentrated in tissues of the central (and enteric) nervous system. 2 points QUESTION 44 Which is not true about plasmids They may carry genes for exotoxins. All are correct They may carry genes for conjugation. They may carry genes for adhesins They are small circular extrachromosomal pieces of double-stranded DNA. 2 points QUESTION 45 Which of the following is false regarding the cyanobacteria? Produce oxygen and previously called blue green algae. They have a less complete metabolism than spirochetes of syphilis (Treponema pallidum) which cant be grown in vitro. They may form symbiotic associations with fungi called lichens. They are the relatives of chloroplasts. Nitrogen fixing forms have the simplest nutritional requirements. 2 points QUESTION 46 Concerning helminthes which of the following is false? Taenia solium is the beef tapeworm. Certain nematodes (Wucheria bancrofti) may produce larval forms following injection by a mosquito that may grow in and block lymphatics leading to elephantiasis. The symbol of the medical profession the Caduceus may have come from the practice of winding Dracunculus medinensis (Guinea worm) on a stick to extract it. Consumption of the eggs of the pork tapeworm can cause systemic spread to the brain and other organs (cystercercosis). All of the above are true. 2 points QUESTION 47 Which of the following is not true of Escherichia coli? like Gr. B strep a common cause of neonatal meningitis and septicemia lactose – coliform and fecal coliform in water testing most common cause of urinary tract infections UPEC cause UTIs 2 points QUESTION 48 All of the following are true of mycobacteria except: produce granulomas in affected tissues. perhaps 1/3 of the world population is infected with M. tuberculosis. all of the above are true. M. bovis is a cause of TB associated with unpasteurized milk. have high content of lipids and waxes in the wall and thus acid fast 2 points QUESTION 49 Which of the following is not true regarding Salmonella and Shigella. There is a capsule and an attenuated living vaccine for typhoid fever. Shigella cause bacillary dysentery. Shigella are H2S + and motile Salmonella are H2S and nonmotile. Salmonella Typhi causes typhoid fever with serious systemic spread. Shigella dysenteriae produces the most severe form of shigellosis and may lead to HUS and kidney damage due to production of Shiga toxin. 2 points QUESTION 50 Which is not true of Streptococcus pneumoniae? Otitis media Main cause of lobar pneumonia Unconjugated and conjugated capsule vaccines Beta hemolytic Show less
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