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NEETZoologyMolecular Basis of Inheritance

What is the length of DNA usually defined as?

Options

  1. AThe number of nucleotides
  2. BThe number of base pairs
  3. CThe number of ribonucleotides
  4. DThe number of deoxyribonucleotides

Correct answer

A. The number of nucleotides

Step-by-step solution

DNA is a long polymer of deoxyribonucleotides. The length of DNA is usually defined as the number of nucleotides (or a pair of nucleotides referred to as base pairs) present in it. This also is the characteristic of an organism. For example, a bacteriophage known as φ ×174 has 5386 nucleotides, Bacteriophage lambda has 48502 base pairs (bp), Escherichia coli has 4.6 × 106 bp, and haploid content of human DNA is 3.3 × 109 bp. Let us discuss the structure of such a long polymer.

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