It is now past the normal dinner time, but you do not even want to think about food. Only diarrhea, abdominal cramps, and vomiting are on your mind. This all started a few hours ago after having a ham sandwich for lunch purchased from a street vendor. With your microbiology knowledge, you surmise that it is a Staphylococcus aureus-related disorder. Why do you think this?
A. The toxin produced by Staphylococcus aureus was already in the ham, so the symptoms can occur quickly.
B. Staphylococcus aureus is the most common cause of gastrointestinal disease.
C. Only Staphylococcus aureus infection causes vomiting, along with cramps and diarrhea.
D. Ham is notorious for being contaminated with Staphylococcus aureus bacteria.
Answer: A
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The interlocking rib cage of Tiktaalik roseae suggests that this transitional organism had lungs. What other traits were found in T. roseae, but not in its ancestral form?
A. An upright stance. B. Wings and scales. C. Primitive wrist and finger-like bones. D. Live young and fins. E. Articulating hip bones.
Physical methods of microbial control include heat, cold, radiation, drying, and filtration.
a. true b. false
In order to reuse an enzyme after the conclusion of an enzyme catalyzed reaction, what must occur?
A. the enzyme has to be resynthesized B. the enzyme has to separate itself from the product C. the enzyme has to decrease entropy D. changes into an active form
Which of the following would not be a valid reason to use PCR?
(A) Help in analyzing DNA of ancient remains of fossilized wholly mammoth (B) Help in determining the DNA of a hair sample found at a crime scene (C) Help in analyzing the genome of a virus (D) Help transferring DNA from a plasmid containing GFP into E. coli