During cytotoxic T cell attack of a target cell, which one of the following is released to pierce the cell membrane of the foreign cell, which ultimately kills the target cell?
A) interferon
B) eosinophil
C) histamine
D) perforin
E) antibody
D
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A northern blot could be used best to monitor control of gene expression at which of the following steps?
A. DNA methylation B. nucelosome acetylation C. protein ubiquitination D. transcription
Potassium deficiency in plants occurs when plants grow on light, sandy soils and cannot obtain enough potassium ions. Such plants are deficient in: (check all that apply)
_____ an essential element. _____ a macronutrient. _____ a micronutrient. _____ a limiting factor.
Allergic rhinitis and hives may both respond to antihistamines
Indicate whether this statement is true or false.
The preferred treatment for anthrax is ________.
A. penicillin B. quinine C. decided after consultation with the CDC D. ciprofloxacin E. the Bio-Thrax vaccine