Which of the following is NOT true of
kwashiorkor?
a. it is the result of a diet poor in fatty acids
b. symptoms include brittle hair
c. symptoms include muscle loss and fatigue
d. symptoms include an enlarged liver
e. all of these are true of kwashiorkor.
A
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A positive pyrrolidonyl arylamidase (PYR) test was observed on a species of Enterococcus. What color should be observed for this reaction?
a. Purple b. Red c. Green d. Pink
If the hypothesis that protocells were based on an "RNA world" is correct, what would be necessary to shift to a "DNA world"?
A. an enzyme or reaction capable of removing one oxygen from ribose in nucleotides B. new enzymes for transcribing DNA back to RNA C. enzymes for reverse transcription of RNA into DNA D. new enzymes to replicate the DNA E. All would be necessary to switch to a "DNA world."
Which of the following streptococci is associated with dental caries?
A) viridans streptococci B) Streptococcus pyogenes C) Streptococcus pneumoniae D) Streptococcus equisimilis E) Streptococcus arginosus
One warm summer day, your uncle cuts up a big batch of chicken parts to barbecue, but then he is called away for a work-related emergency. When your aunt makes the salad several hours later, she uses the knife that your uncle left unwashed next to the sink. What might happen to you later that night, and why?