Of the two polypeptide chains found in insulin, which chain is the longest?
a. chain A
b. chain B
b
Biology & Microbiology
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Variation among individuals in a species is usually caused by:
A. environmental variation. B. genetic variation. C. infectious variation. D. both environmental variation and genetic variation. E. environmental variation, genetic variation, and infectious variation.
Biology & Microbiology
Purines and pyrimidines refer to the ________ of the DNA molecules.
A) nitrogenous bases B) sugar-phosphate backbone C) hydrogen bonds D) nucleus E) histones
Biology & Microbiology
The influenza virus can infect:a
humans b. pigs c. birds d. humans and pigs e. humans, pigs and birds
Biology & Microbiology
In a process called __________ , the cell pinches in half, with one complete set of chromosomes in each half.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology