RNA Types · Botany

Heterogeneous nuclear RNA (hnRNA) is best described as:

  1. The degraded fragments of rRNA
  2. The primary transcript of mRNA with introns and exons
  3. RNA found only in the chloroplast stroma
  4. A specialized type of RNA used only for DNA replication
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Correct answer: The primary transcript of mRNA with introns and exons

hnRNA refers to the immediate product of transcription by RNA polymerase II. It serves as the precursor (pre-mRNA) that must be processed into mature mRNA.

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