Given below are some statements about satellite DNA.
(A) These are interspersed sequences.
(B) They are tandemly arranged.
(C) These are non-coding.
(D) These are unique sequences of DNA.

Choose the option which mentions the correct statements.

B and C

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A and D

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A and C

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B and D

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Solution

The correct option is A B and C
During density gradient centrifugation, satellite DNA appears as a different band due to lesser buoyant density. These are highly repetitive DNA sequences, tandemly arranged, located mostly at the centromeric and telomeric regions. They are part of heterochromatin and did not code for any polypeptide.
Interspersed sequences are moderately repetitive DNA sequences that are dispersed throughout the genome.

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