Q166 / 180 · AIIMS 2004 · Zoology

The total number of nitrogenous bases in human genome is estimated to be about

  • A
    3.5 million
  • B
    35 thousand
  • C
    35 million
  • Correct answer
    D
    3.1 billion.

Solution

The two DNA strands are held together by weak (hydrogen) bonds between the bases on each strand, forming base pairs. Genome size is usually stated as the total number of base pairs; the human genome contains roughly 3 billion base pairs.

Hence, the correct answer is option: 'D'.

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