what is bulk DNA and satellite DNA?

Satellite DNA consists of very large arrays of tandemly repeating, non-coding DNA. Satellite DNA is the main component of functional centromeres, and form the main structural constituent of heterochromatin.[1][2]

The name "satellite DNA" refers to how repetitions of a short

DNA

sequence tend to produce a different frequency of the

nucleotides adenine

,

cytosine

,

guanine

and

thymine

, and thus have a different density from bulk DNA - such that they form a second or 'satellite' band when genomic DNA is separated on a

density gradient

Satellite DNA consists of very large arrays of tandemly repeating, non-coding DNA. Satellite DNA is the main component of functional centromeres, and form the main structural constituent of heterochromatin.[1][2]
The name "satellite DNA" refers to how repetitions of a short
DNA
sequence tend to produce a different frequency of the
nucleotides adenine
,
cytosine
,
guanine
and
thymine
, and thus have a different density from bulk DNA - such that they form a second or 'satellite' band when genomic DNA is separated on a
density gradient

 Bulk DNA is the DNA that is present in majority and is different from satellite DNA.

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