Question

6. Which of the following is false concerning NASA's interest in a p is false concerning NASA's interest in a possibility of Martian life? A. The interest was originally sparked by internal features of meteorite ALH 84001(the oldest of about 50 known mars-derived meteorites). These features included bacterial fossil-like structures, complex organics, and magnetite structures like that produced by magnetotactic bacteria on earth. NASA recently announced discovery of organics in >3 billion y/o “mudstone." They also reported "seasonal" spikes in methane above the ancient crater lake- bed. All of the above are true. E. 7. Which of the following is mismatched concerning the early great microbiologists? A. Anton van Leeuwenhoek = First observations of the microbial world Paul Erlich = Father of chemotherapy, worked on soluble substances in blood (i.e., antibodies), stained mycobacteria, discovered Salvarsan 606 for syphilis Joseph Lister = Antiseptic surgical practice D. Dmitri Iwanowski = Role of phagocytosis in combating bacterial infections E. None of the above is mismatched. 4. 8. Which of the following is false concerning Coronaviruses? Single-stranded RNA, + strand, helical virus. B. Enveloped making hand disinfection very difficult. Coronavirus name derived from the Latin corona, meaning crown, with a fringe of large, bulbous surface projections (or spikes). D. A receptor-binding domain on S (spikes) mediates the attachment of the virus to its cellular receptor and thus determines tropism or host range. No vaccines or therapeutics. 9. Which of the following characteristics of the 3 domains of living things (which all have the characteristic) exclude viruses, viroids and prions? proteins mitochondria ribosomes nucleic acid E. mitosis Which of the following is false concerning syphilis? Caused by the spirochete Treponema pallidum. Diagnosis is by cultivation on appropriate selective media. The initial lesion (chancre) at the site of entry looks something like a fever blister. Secondary syphilis is characterized by a maculopapular rash prominent on palms of hands and soles of feet. E. Untreated primary/secondary syphilis leads years later to tertiary syphilis with destructive granulomas (gummas), dementia, and aortic aneurisms.

Answer 1

6. E. All of the above are true, all the statement are by nasa has sources that clarifying that they are not false.

7. D. Dimriti iwanoski = an russian botanist discovered virus that was affecting tobacco plants and also co-founder of virology.

8. B. Enveloped making hand disinfectant difficult. It can be disinfected with normal regular soap too by hand washing.

9. D. Nucleic acid as 3 domains have archea, bacteria and eukaryo were the other options are more favourable than nucleic acid as archea dont have nucleus.

10. B. Diagnosis is by cultivating a selective appropriate media, its diagnosed by direct fluorescence antibody (DFA) or by PCR. These test are not time sensitive as they don't require living bacteria for diagnosing.