The genes that code for proteins and the genes for RNA products such as rRNA and tRNA constitute a surprisingly small portion of the genomes of most multicellular eukaryotes. The majority of most eukaryotic genomes consist of non-coding regions, sometimes described as "junk DNA." However, recent evidence shows that even this so-called "junk DNA" can play important roles. Which of the following is not a type of non-coding DNA?

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Biology

23 August, 10:03

The genes that code for proteins and the genes for RNA products such as rRNA and tRNA constitute a surprisingly small portion of the genomes of most multicellular eukaryotes. The majority of most eukaryotic genomes consist of non-coding regions, sometimes described as "junk DNA." However, recent evidence shows that even this so-called "junk DNA" can play important roles. Which of the following is not a type of non-coding DNA?

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Terrell Adams · Answer 1

Exons

Explanation:

1. DNA contain both coding (exon) as well as non-coding (intron) sequences. The coding sequence codes for mature RNA and then translated into protein.

2. The coding sequence of DNA are known as exons. DNA also contain non coding sequences, which are not transcribed into any RNA or then protein.

3. These non-coding sequences are known as introns. These introns are removed during RNA splicing. The process of joining of exons and removal of introns is known as RNA splicing.