Which of the statements about nucleosomes are correct?
a. most histones are large (more than 250 amino acid residues), acidic proteins rich in lys and arg.
b. degradation of linker dna yields dna fragments of about 200 bp.
c. dna binding to histones enables overall positive supercoiling without enzymes that underwind the dna helix.
d. partial enzymatic digestion of chromatin results in dna fragments of about the histones h2a, h2b, h3, and h4 make up the nucleosome octamer that binds dna.
e. histone proteins are positioned on dna, in part, based on the abundance of clusters of base pairs in dna.

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

Cultures of the lake of the ozarks water samples were grown on enrichment media for identification. however, these organisms are present to some degree in all samples. an important question from a clinical perspective is whether or not there is a significant increase in the fecal coliform populations that would put people's health at risk. if you were part of the team investigating this outbreak, how would you best enumerate the fecal coliform threat? view available hint(s) cultures of the lake of the ozarks water samples were grown on enrichment media for identification. however, these organisms are present to some degree in all samples. an important question from a clinical perspective is whether or not there is a significant increase in the fecal coliform populations that would put people's health at risk. if you were part of the team investigating this outbreak, how would you best enumerate the fecal coliform threat? direct microscopic counts filtration count culture serial dilution count culture plate count culture

Name the glands associated with human digestive system