Shingles is caused by reemergence of the _______ virus.
A. Epstein-Barr
B. measles
C. chicken pox
D. flu
Answer: C. chicken pox
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DNA contains two identical polynucleotide chains
a. True b. False Indicate whether the statement is true or false
A strain that can grow in minimal medium containing ornithine, citrulline, or arginine, but not in minimal medium alone would have a mutation in the gene that encodes for
Wild type bread mold can grow in a minimal medium without supplements, while certain mutated strains can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis. See the figure below for an overview of the arginine biosynthetic pathway.
A. enzyme 1.
B. enzymes 1, 2, and 3.
C. enzyme 2.
D. The strain would be the wild type with no genetic mutations.
E. enzyme 3.
F. enzymes 1, 2, and 3.
G. The strain would be the wild type with no genetic mutations.
How do corals react when water temperatures are too high?
A. They slow down their shell-building processes. B. They expel their symbiotic algae. C. They migrate to areas with lower water temperatures. D. They produce more pigment. E. They reproduce in large numbers.
Which of the following cells are a major reservoir for and distributor of HIV?
A) helper T cells B) B lymphocytes C) cytotoxic T cells D) infected dendritic cells E) monocytes and macrophages