All eukaryotic genes contain two kinds of base sequences. Which of the following plays role in protein synthesis?

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The gene of a Eukaryotic organism contains two kinds of base sequences. These sequences are known as Intron or intragenic region and Exon.

The intron is a part of a gene that is removed during mRNA maturation by a process called RNA splicing. Therefore, the intron sequence is a noncoding part of the gene that does not code for any protein sequence. Most of the eukaryotic genes are broken up by one or more introns. On the other hand, exons are the parts of the eukaryotic gene sequence that are expressed in the protein.

During RNA processing introns are removed by RNA splicing, and exons are joined covalently to one another generating the mature mRNA. Therefore, the exon of the eukaryotic gene plays an important role in protein synthesis.