Erosion of the gastrointestinal tract that results in a sore is called a ________

A) pore B) chancre C) peptic ulcer D) diverticulum


Answer: C

Biology & Microbiology

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A ribonucleoprotein is:

A. an enzyme that degrades RNA. B. an RNase that functions in the nucleus. C. a nucleotide-transport protein. D. a noncoding RNA complexed with protein.

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Why are most energy pyramids limited to three to five levels

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Solid worms that lack a body cavity are known as

A. acoelomates. B. triploblastic. C. diploblastic. D. pseudocoelomates. E. coelomates.

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To determine the isoelectric point of a protein, first establish that a gel:

A) contains a denaturing detergent that can distribute uniform negative charges over the protein's surface. B) exhibits a stable pH gradient when ampholytes become distributed in an electric field. C) is washed with an antibody specific to the protein of interest. D) neutralizes all ionic groups on a protein by titrating them with strong bases. E) relates the unknown protein to a series of protein markers with known molecular weights

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