Biology - Molecular Basis of Inheritance Question with Solution | TestHub

According to Chargaff's rule for a double-stranded DNA molecule, the number of adenine bases is equal to the number of thymine bases, and the number of guanine bases is equal to the number of cytosine bases.

Given, Adenine ($A$) = $25$

Therefore, Thymine ($T$) = $25$

Given, Guanine ($G$) = $45$

Therefore, Cytosine ($C$) = $45$

Total number of nucleotides = $A+T+G+C$

Total number of nucleotides = $25+25+45+45=140$

Answer: 140