Approximately 5% of the cytosine residues are methylated in the genome of any given eukaryote. In what way is DNA methylation related to genetic regulation?
What will be an ideal response?
There is an inverse relationship between the degree of methylation of eukaryotic DNA and the degree of gene expression.
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Which of the following drugs has been discovered to bind to acetylcholine receptors?
A. serotonin reuptake inhibitors B. thorazine C. cocaine D. codeine E. nicotine
Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called ________.
A. cytopathic effects B. patches C. plaques D. buds E. pocks
What primarily determines the shape of animal cells, which lack cell walls?
A) Ribosomes B) Cytoskeleton C) Nucleus D) Cytoplasm E) Endoplasmic reticulum
All of the following are associated with nucleic acid structure EXCEPT
A) ribose. B) hydrogen bonds. C) uracil. D) ionic bonds. E) phosphate.