Base Pairing Rules:
* Adenine (A) always pairs with Thymine (T) via two hydrogen bonds.
* Guanine (G) always pairs with Cytosine (C) via three hydrogen bonds.
Why is this important?
* Complementary base pairing is the foundation of DNA's structure. This pairing ensures that the two strands of DNA are always complementary to each other.
* It allows for accurate DNA replication. When DNA replicates, the two strands separate, and each strand serves as a template for the synthesis of a new complementary strand.
* It's crucial for protein synthesis. The sequence of bases in DNA determines the sequence of amino acids in proteins.
Let's break down why the other options are incorrect:
* Option 1: A pairs with G and C pairs with T. This is incorrect as it violates the base pairing rules.
* Option 2: A pairs with C and G pairs with T. Again, incorrect because it doesn't follow the correct base pairing.
* Option 3: A pairs with T and G pairs with C. This is the correct option!
In summary: The base pairing rules in DNA are fundamental to its structure and function.
