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In an experiment you try to hybridize a Dna single strand with a mature RNA. You observe loops being formed. These loops have ____________

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In an experiment you try to hybridize a Dna single strand with a mature RNA. You observe loops being formed. These loops have ____________

(a) Dna

(b) RNA

(c) HIstone octamer

(d) Histone H1

The question was posed to me at a job interview.

Asked question is from Post-Transcriptional Modification in division Gene Expression : Transcription Prokaryotes of Cytogenetics

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The correct answer is (a) Dna

To elaborate: Due to splicing the mature mRNA is shorter than the DNA with the introns in DNA looping out when they hybridize. Thus the loops have DNA.

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