Which of the following pathogens does NOT require capsules or a slime layer for attachment?
A) Vibrio cholera
B) Streptococcus pneumonia
C) Bacillus anthracis
D) All of these pathogens require capsules or slime layers for attachment.
Answer: A
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In an inflammatory response, the direct effect of histamine is to _______________
A. dilate blood vessels causing increased blood flow to the area of infection B. decrease heat accumulation in the area of infection C. directly kill bacteria D. attack cytotoxic T cells E. cause B cells to release antibodies
A potentially serious problem with Taq polymerase in PCR is its lack of proofreading ability. Briefly explain why this can be a problem and at which stages during the PCR process this is most and least problematic
What will be an ideal response?
The liver functions in digestion by
A. destroying old red blood cells. B. producing blood proteins. C. producing bile. D. converting hemoglobin to bilirubin and biliverdin. E. producing urea.
Which of the following statements about mutations is false?
A) Mutations are essential to variation within species. B) Multicellular organisms evolve faster than unicellular organisms. C) A mutation in a single-celled organism is more likely to be passed to daughter cells than a multicellular organism. D) Mutations are essential to evolution within species. E) A mutation is a change in the genetic material of a cell or virus.