BIOMOLECULES AND ENZYMES

Detailed explanation-1: -In eukaryotic genes, the coding regions or coding sequences are called as exons. These coding sequences are interrupted by noncoding regions or noncoding sequences called as introns.

Detailed explanation-2: -Most eukaryotic genes are interrupted by non-coding introns that must be accurately removed from pre-messenger RNAs to produce translatable mRNAs.

Detailed explanation-3: -No introns: Eukaryote genes commonly contain introns (non-coding sequences). These are removed after mRNA synthesis so cDNA contains no introns. This means that a cDNA copy of a gene can be isolated as a single, intron-free fragment.

Detailed explanation-4: -All eukaryotic genomes carry introns as parts of some gene structures and the introns are to be eliminated by a complex molecular machinery called the spliceosome comprising five snRNAs and more than 150 proteins [1, 2].