Question

Which of the following statements about eukaryotic RNA is true?
O -A small cap of extra nucleotides is added to both ends of the RNA.
O -The modified RNA molecule is transported into the nucleus.

-Exons are spliced together.

-Introns are not transcribed from DNA to RNA.

Answer 1

Answer:

A small cap of extra nucleotides is added to both ends of the RNA

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Answer 2

The statement 'exons are spliced together' is TRUE. The exons are the coding regions of genes.

• RNA splicing is a eukaryotic mechanism by which non-coding sequences of genes called 'introns' are removed from the precursor messenger RNA (pre-mRNA), whereas protein-coding sequences called 'exons' are spliced together.

• These gene coding sequences (exons) are spliced together by a macromolecular complex known as the spliceosome.

• In consequence, a pre-mRNA is converted into a mature mRNA, which is subsequently used for protein synthesis.

In conclusion, the statement 'exons are spliced together' is TRUE.

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