High levels of tryptase in the blood is indicative of
A. a viral and/or fungal infection.
B. overuse of dietary supplements.
C. high levels of degranulating mast cells suggesting an allergic reaction.
D. a bacterial infection.
Answer: C
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Most prokaryotic genomes are double-stranded circular DNA
Indicate whether the statement is true or false.
Many of the color varieties of summer squash are determined by several interacting loci: AA or Aa gives white, aaBB or aaBb gives yellow, and aabb produces green. Assume that two fully heterozygous plants are crossed
Give the phenotypes (with frequencies) of the offspring.
Color changes in leaves Leaves of many plants change colors in the fall because
a) the cooler weather causes plants to produce more of the accessory photosynthetic pigments. b) chlorophyll in the leaves degrades with shorter days and cooler temperatures. c) the decrease in daylight hours causes the plant to produce more of the accessory photosynthetic pigments. d) plants produce more chlorophyll. e) All answers are correct.
All of the following pertain to Listeria monocytogenes except
A. gram positive B. sporeformer C. contaminant of dairy products, meats, poultry D. causes foodborne listeriosis E. cold enrichment improves recovery in the lab