Chargaff's rule states that in an organism

Chargaff's rule states that in an organism
  1. amount of adenine (A) is equal to that of thymine $(\mathrm{T})$ and the amount of guanine $(\mathrm{G})$ is equal to that of cytosine (C)
  2. amount of adenine (A) is equal to that of guanine (G) and the amount of thymine $(T)$ is equal to that of cytosine (C)
  3. amount of adenine (A) is equal to that of cytosine $(\mathrm{C})$ and the amount of thymine $(T)$ is equal to that of guanine (G)
  4. amounts of all bases are equal

Solution

Chargaff rule states that in DNA there is always equality in quantity between the bases $\mathrm{A}$ and $\mathrm{T}$ and between the bases $\mathrm{G}$ and $\mathrm{C}$. Related Theory In all the species the molar ratios $[A]=[T]$ and $[C]=[G]$, and that ratio $[C+G] /[A+T]$ was typically less than the unity with $[C+G]$ is less abundant.

Asked in: NEET 2003

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