Several friends returned from a backpacking trip in a nearby state forest area and began to experience bouts of abdominal cramping, flatulence, and severe diarrhea with greasy, fatty stools. What is the most likely cause?
A. Cryptosporidiosis
B. Giardiasis
C. Toxoplasmosis
D. Amebic dysentery
Answer: B
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Which one of the following, if missing, would usually prevent translation from starting?
A) exon B) cap C) AUG codon D) poly-A tail
Because of the low penetration power of electrons, samples for transmission electron microscopy must be extremely thin. A(n) ________ is able to cut sections as thin as 20 nm.
Fill in the blank(s) with the appropriate word(s).
The appropriate temperature in which to store specimens for viral isolation is ____°C
a. 4 b. 25 c. 30 d. 37
This figure demonstrates a DNA repair mechanism. What property of DNA makes such repair possible in DNA but not RNA?
a. DNA uses deoxyribose instead of ribose. b. DNA uses thymine instead of uracil. c. DNA is a double helix. d. DNA is more reactive than RNA.