Chromatin may be remodeled by: (Select all correct choices)
A. chemical modification of the nucleotide
bases of the DNA.
B. mutations affecting the structure of the
chromosome's non-histone proteins.
C. chemical modification of the
chromosome's histone proteins.
C
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In the Gram-staining procedure, the primary stain is
A. alcohol. B. crystal violet. C. iodine. D. safranin.
The cells of which tissue are connected by gap junctions?
a. skeletal muscle b. cardiac muscle c. smooth muscle d. adipose muscle e. cardiac and smooth muscle
What is a transgenic organism?
a. an organism with multiple copies of the same gene b. an organism that has genes from another species c. an organism that does not use DNA to specify proteins d. an organism that has had its entire genome sequenced e. an organism that has been DNA profiled
Similarities between the archaea and eukarya include
A. similar tRNA. B. the same ribosomal proteins. C. that they are more closely related to each other than to the bacteria. D. similar initiation of transcription. E. All of the choices are correct similarities.