Question

Which of the following is true?

(A) Protein-coding genes make up far less of the human genome than noncoding DNA.
(B) Protein-coding genes and noncoding DNA make up about the same amount of the human genome.
(C) Protein-coding genes make up far more of the human genome than noncoding DNA.
(D) Noncoding DNA has not been found in humans.

Answer 1

(A) Protein-coding genes make up far less of the human genome than noncoding DNA.

Step-by-step explanation:

The human genome contains both protein-coding and non-coding sequences. However, the non-coding sequences make most of the human genome as they account for as much as 98.5% of the total human genome. The non-coding part of the human genome serves other important functions such as promoter, enhancers, silencers for gene expression.

An only small part of the human genome serves as protein-coding genes and make exons.