Examlex
Answer true or false to the reason given in the following statement: Poliomyelitis is essentially nonexistent in developed countries because of intensive supportive care.
Heterochromatin
A tightly packed form of DNA, which is transcriptionally inactive, aiding in maintaining the DNA's structural integrity.
Euchromatin
A lightly packed form of chromatin (DNA, RNA, and protein complex) that is enriched in gene concentration and is active in transcription.
Barr Bodies
Inactivated X chromosomes found in the nuclei of cells in female organisms, visible as a dense mass, and a key component in dosage compensation.
Promoters
DNA sequences located near the beginning of a gene that signal RNA polymerase where to start transcription.
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