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Which of the following statements on intron and exon is correct:             a. Intron and exon...

Which of the following statements on intron and exon is correct:

            a. Intron and exon are joined together

            b. contain nucleosomes

            c. Is found in tRNA

            d. Intron is joined and exon are discarded

            e. Iexon is present in mRNA

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Answer #1

Option E

the Messenger RNA formed after transcription is premature. It contains introns and exons. Introns are non coding sequences and exons are coding sequences. During RNA processing, exons are joined together and introns are removed.

First option is incorrect because introns are excised from the final messenger RNA transcript and only exons are retained.

Second option is incorrect because nucleosomes are associated with DNA and not RNA.

Third option is incorrect because exons and introns are found on messenger RNA.

Fourth option is incorrect because exons are joined and introns are discarded.

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