Regulatory DNA elements bound by transcription factors during initiation

Non-coding regions transcribed but spliced out before translation

Coding regions retained in mature mRNA and translated into protein

Repetitive sequences at chromosome ends that protect against degradation

Transcription and RNA Processing

AP Biology· difficulty 2/5

Introns are

A
$Regulatory DNA elements bound by transcription factors during initiation$
B
$Non-coding regions transcribed but spliced out before translation$
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C
$Coding regions retained in mature mRNA and translated into protein$
D
$Repetitive sequences at chromosome ends that protect against degradation$

Explanation

"Introns" = "intervening sequences." They're transcribed but removed from the mature mRNA. "Exons" are expressed.

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