Which answer correctly compares the primary transcript in the nucleus of a eukaryotic cell with the functional mRNA

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21-07-2022
Biology

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Which answer correctly compares the primary transcript in the nucleus of a eukaryotic cell with the functional mRNA

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jahanavi0902 jahanavi0902 · Answer 1 · 2022-07-27T10:19:32+02:00

The size of the primary transcript in the nucleus of the eukaryotic cell is longer than the size of the functional mRNA.

The primary mRNA transcript present in the nucleus is obtained from DNA template sequence transcription. The primary transcript is said to be inactive due to the presence of some non-functional regions (introns) within.

To obtain a functional mRNA from the primary transcript, introns are spliced or removed from the primary transcript with the help of RNA alternative splicing. This leads to the joining of the functional segments (exons) in the mRNA transcript. This joint segment of exons is the modified active form of primary transcript known as the functional mRNA, which is comparatively shorter in length.

Hence, we can conclude that the size of the functional mRNA is shorter than the primary transcript in a eukaryotic cell.

Learn more about post-transcriptional modification in eukaryotes here: -

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