Question

Before the three-dimensional structure of DNA was discovered, scientists knew that DNA contained nitrogenous bases. The table below shows the percentages of the nitrogenous bases in a DNA sample. Which rule can be used to determine the percentages of the missing nitrogenous bases? Complete the table AND explain your answer.

Answer 1

Chargaff's rule will be applied to know the percentage of missing bases.

The table is filled and shown in attachment.

Step-by-step explanation:

According to the Chargaff's rule, the base pairs of pyrimidine and purine should have the ratio of 1:1.

It is based on the principle that Guanine bonds with Cytosine should be in equal concentration while Adenine bonds with thymine should be in equal concentration. Chargaff rule applies to the DNA only.