Chargaff's rules state that in DNA:Group of answer choicesA = GA+G = T+CA = UA+T = G+C

Chargaff's rules describe the relationships between the nucleotide bases in DNA. Specifically, they state that:

1. The amount of adenine (A) is equal to the amount of thymine (T), expressed as $A = T$.
2. The amount of cytosine (C) is equal to the amount of guanine (G), expressed as $C = G$.

In summary, Chargaff's rules can be expressed as:

• $A = T$
• $C = G$

This implies that in a typical double-stranded DNA molecule, the percentage of adenine will always equal the percentage of thymine, and the percentage of cytosine will always equal the percentage of guanine. So, if you were to calculate the total composition of DNA, these relationships would hold true.

If we apply these rules to the choices given:

• $A = G$ and $A + G = T + C$ do not adhere to Chargaff's rules.
• Therefore, the correct relationships are $A = T$ and $C = G$.

In conclusion, the options you provided do not accurately reflect Chargaff's rules. The correct expressions based on Chargaff’s observations should state the equality between A and T as well as C and G.