Question

The "rule" formulated by Chargaff states that A) A = T and G = C in any molecule of DNA. B) A = C and G = T in any molecule of DNA. C) A = G and C = T in any molecule of DNA. D) A = U and G = C in any molecule of RNA. E) DNA and RNA are made up of the same four nitrogenous bases.

Answer 1

Step-by-step explanation:

The "rule" formulated by Chargaff states that A) A = T and G = C in any molecule of DNA.

This means that in a DNA molecule, the amount of adenine (A) is equal to the amount of thymine (T), and the amount of guanine (G) is equal to the amount of cytosine (C).

Chargaff's rule is based on the observation that in DNA, the two strands are complementary to each other. This means that if one strand has an adenine (A) base, the other strand will have a thymine (T) base opposite it. Similarly, if one strand has a guanine (G) base, the other strand will have a cytosine (C) base opposite it.

For example, if one DNA strand has the sequence A-T-G-C, the complementary strand would have the sequence T-A-C-G.

Chargaff's rule is important in understanding the structure and function of DNA. It provides the basis for DNA replication, where each strand serves as a template for the synthesis of a new complementary strand. It also helps explain the stability and integrity of the DNA molecule, as any change in the base-pairing would disrupt the structure and function of DNA.