What measures would be taken if a case of smallpox were recognized in a world traveler after the individual had debarked from Heathrow airport in England following several days of sightseeing in London?
What will be an ideal response?
Answer: The World Health Organization (WHO) would first quarantine the traveler with the smallpox disease to avoid any further spread of the infectious agent. Next, all individuals known to have contact with the infected individual would be quarantined, observed, and immunized to ensure they would not become ill. The WHO could also vaccinate people who might not have had direct contact with the infected person but were present at the outbreak site. Very few people are immunized against smallpox in the current population, thus almost the entire world population is susceptible. The WHO would likely take a very aggressive and proactive approach to ensure that smallpox would not spread, given its high mortality rate and the extremely large susceptible population.
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What is the best way to describe our current understanding of the one-gene/one-polypeptide hypothesis?
A. It continues to be an accurate description of how genes work. B. It is oversimplified, especially in eukaryotes. C. It has been replaced by the more accurate “one-gene/one-enzyme” hypothesis. D. It was true for fungi like Neurospora, but not for other species.
Which of the following statements is NOT true of Gram-positive bacteria?
A. They have a thicker peptidoglycan layer than do Gram-negative bacteria. B. They turn purple when subjected to the Gram-staining process whereas Gram-negative bacteria stain pink. C. They lack the lipopolysaccharide that Gram-negative bacteria have. D. They fluoresce at a different color than do Gram-negative bacteria. E. They have a gram molecular weight of more than 1.0 whereas Gram-negative bacteria have a gram molecular weight of less than 1.0.
Traits that are controlled by genes located on the X chromosome are said to be ________.
A. gametal B. autosomal C. sex-linked D. pleiotropic
Fibrous structures with three "arms" some archaea use for attachment to surfaces are (fimbriae/hami/pili)
What will be an ideal response?