Question

Select the correct statement about human genome project.

• A. 1.6% of genome encodes protein sequences.
• B. All nonprotein coding sequences in genome are junk DNA with no function.
• C. Introns are the section of protein coding genes that encode amino acid sequence.
• D. Human genome contains approximately 50,000 protein coding genes.

Answer 1

Answer: (A)

1.6% of genome encodes protein sequences.

A- Less than 2% of the genome encodes proteins. Junk DNA is noncoding DNA which fails to offer instructions for making proteins. They are helpful in the control of gene activity. Introns fail to encode protein products, they are crucial in regulation of gene expression. Human genome contains approximately 20,000-25,000 protein coding genes.

So, the correct answer is '1.6% of genome encodes protein sequences.'