The time period from the initial contact with an infectious agent to the appearance of the first symptoms is known as the _____

Fill in the blank(s) with the appropriate word(s).


incubation period

Biology & Microbiology

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Iodine can be complexed with an organic carrier to form water-soluble, stable complexes called ________, which release iodine slowly and eliminate skin burns and irritation associated with iodine use.

A. iodochromes B. iodophors C. tinctures D. iodides

Biology & Microbiology

Endosymbiosis of cyanobacteria is widely accepted as an explanation for the development of chloroplasts.  The presence of endosymbiotic cyanobacteria provided a cell with the advantage of ________.

A. a membrane-bound nucleus B. tolerance to oxygen C. an electron transport chain D. simple, rapid gene transfer E. photosynthesis

Biology & Microbiology

What determines the specific segment of DNA that is amplified by PCR?

A) the plasmid used B) the type of DNA polymerase C) the use of DNA ligase D) the source of nucleotides E) the primers used

Biology & Microbiology

The site on the surface of an enzyme where a substrate binds is called the:

A. active site B. allosteric site C. binding site D. reactive site

Biology & Microbiology