Question

DNA has equal number of adenine and thymine residues $(A=T)$ and equal number of guanine and cytosine $(G=C)$. These relationships are known as

• A. Chargaff's rule
• B. Coulomb's law
• C. Le-Chatelier's principle
• D. Van't Hoff plot

Answer 1

Answer: (A)

Chargaff's rule

Erwin chargaff gave then rule that demonstrate the nitrogenous component of the DNA double helix and such rule is called as chargaff's rule. It states that the DNA of all the organism have equal number of purine and pyrimidine i.e., in 1 : 1 ratio.Thus, the correct answer is option A.