Which nitrogen base in DNA is represented by the letter 'A'?

Which nitrogen base in DNA is represented by the letter 'A'?

• A. Adenine
• B. Thymine
• C. Cytosine
• D. Guanine

Answer: (A)

In DNA, the letter 'A' represents Adenine, which is one of the four primary nitrogenous bases. Adenine plays a crucial role in the structure of DNA, where it pairs with Thymine (represented by 'T') through two hydrogen bonds, supporting the double-helix structure. Understanding this base pairing is fundamental in molecular biology, as it helps in explaining how genetic information is replicated and transmitted during cell division. The specific pairing mechanism also indicates the complementary nature of the DNA strands, where adenine is always paired with thymine, ensuring that the genetic code is accurately maintained in organisms.

In DNA, the letter 'A' represents Adenine, which is one of the four primary nitrogenous bases. Adenine plays a crucial role in the structure of DNA, where it pairs with Thymine (represented by 'T') through two hydrogen bonds, supporting the double-helix structure. Understanding this base pairing is fundamental in molecular biology, as it helps in explaining how genetic information is replicated and transmitted during cell division. The specific pairing mechanism also indicates the complementary nature of the DNA strands, where adenine is always paired with thymine, ensuring that the genetic code is accurately maintained in organisms.