the length of DNA is a characteristic of an organism and is defined by the number of nucleotides or base pairs (bp) present in it . The haploid content of human DNA (representing 23 chromosomes) is 3.3 × 10^9 bp . In a typical diploid human cell (containing 46 chromosomes), the total DNA content is approximately 6.6 × 10^9 bp, which corresponds to a length of about 2.2 metres . The Human Genome Project further refined this estimate, finding that the human genome contains 3164.7 million bp . Mastering these specific molecular values is a high-priority strategy for medical aspirants, as NCERT textbooks serve as the primary source for approximately 95% of NEET Biology questions .