The 1% figure indicates what about the share of all human genes?

The 1% figure indicates what about the share of all human genes?

• A. About 5%
• B. About 1%
• C. About 0.1%
• D. About 10%

Answer: (B)

Only a small fraction of the human genome is used to make proteins. The 1% figure shows that protein-coding sequences constitute about one percent of the genome, meaning most DNA in the genome is noncoding but still serves regulatory or structural roles. There are roughly 20,000 protein-coding genes, but they are spread within a genome of about 3 billion base pairs, with the vast majority of DNA not coding for proteins. So the correct interpretation is that protein-coding portions make up about one percent of the genome.

Only a small fraction of the human genome is used to make proteins. The 1% figure shows that protein-coding sequences constitute about one percent of the genome, meaning most DNA in the genome is noncoding but still serves regulatory or structural roles. There are roughly 20,000 protein-coding genes, but they are spread within a genome of about 3 billion base pairs, with the vast majority of DNA not coding for proteins. So the correct interpretation is that protein-coding portions make up about one percent of the genome.