Which one of the following statements is incorrect regarding Human genome?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → The functions are known for over 50 per cent of the discovered genes
The Human Genome Project gave a set of facts about the human genome. Each option is checked against those facts.
(1) The human genome contains 3164.7 million bp. — A correct statement. This is the size of the human genome found by the project.
(2) The average gene consists of 3000 bases. — A correct statement. The size of genes varies a great deal. The largest known human gene, dystrophin, has 2.4 million bases.
(3) The functions are known for over 50 per cent of the discovered genes — The incorrect statement. It is the other way round. The functions are unknown for over 50 per cent of the discovered genes.
(4) Less than 2 per cent of the genome codes for proteins. — A correct statement. A very large part of the genome is repeated sequences, which have no direct coding function.
NCERT Extract:
Salient Features of Human Genome – …
