________ is a type of an allergic response in which the release of histamines triggers breathing passages to become narrow.
Fill in the blank(s) with the appropriate word(s).
Asthma
Asthma is a type of an allergic response in which the release of histamines triggers breathing passages to become narrow.
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Consider the global nitrogen cycle depicted in the figure above. How are humans altering this cycle?
A) industrial nitrogen fixation B) nitrogen lost to the atmosphere C) reduction of nitrogen available to terrestrial ecosystems D) reduction of nitrogen fixation by bacteria E) permanent burial of nitrogen in coastal environments through runoff
Three mRNA nucleotides code for one amino acid.
a. Polymerization area b. Promotion region c. Translation bubble d. Transcription bubble
In an experiment like that of the 1952 Hershey and Chase experiments, 35S was added to a phage replicating within its bacterial host
The new phage particles were carefully isolated and used to infect fresh bacterial cells in the absence of any radioisotopes. Where would you expect to find the 35S radioisotope immediately after infection? A) in the phage ghosts outside the bacterial cells B) incorporated into the bacterial matrix proteins C) incorporated into the bacterial DNA D) inside the bacterial cells, but separate from the bacterial DNA E) inside the bacterial cells, but separate from the bacterial proteins
Which of the following pairs is mismatched?
A) malaria — Anopheles (mosquito) B) dengue — Aedes (mosquito) C) epidemic typhus — Pediculus (louse) D) Rocky Mountain spotted fever — Dermacentor (tick) E) encephalitis — Ixodes (tick)