Which of the following is true?
A)The genome consists of entirely protein-encoding genes.
B)An amino acid encodes a gene.
C)DNA has five types of nucleotide bases.
D)Much of the genome does not encode proteins.

Question

Quizplus · Accepted Answer

Much of the genome does not encode proteins. The genome is made up of all the DNA in an organism, including both protein-coding genes and noncoding DNA sequences. The noncoding DNA sequences play important regulatory roles in gene expression and other cellular processes, but do not directly code for proteins. Therefore, much of the genome does not encode proteins. A is incorrect because the genome includes noncoding DNA sequences. B is incorrect because an amino acid is a building block of proteins, not a gene itself. C is incorrect because DNA has four types of nucleotide bases: adenine, cytosine, guanine, and thymine.

Which of the Following Is True