Approximately What Fraction of the Human Genome Codes for Proteins

Question

Approximately what fraction of the human genome codes for proteins?
A) 2%
B) 33%
C) 45%
D) 78%
E) 92%

Accepted Answer

Only a small fraction of the human genome codes for proteins, estimated to be around 2% of the total genome. Much of the rest of the genome is made up of non-coding DNA, including regulatory elements, introns, and repetitive sequences.