Nitrogenous bases in DNA are responsible for what?

Nitrogenous bases in DNA are responsible for what?

• A. They form the rungs of the ladder and include A, T, G, and C
• B. They are the sugar molecules in the backbone
• C. They are the phosphate groups in the backbone
• D. They are enzymes that unwind DNA

Answer: (A)

Nitrogenous bases are responsible for encoding genetic information by forming the rungs of the DNA ladder and pairing specifically to hold the two strands together. Adenine pairs with thymine and guanine pairs with cytosine, creating a stable, complementary structure that stores the genetic code in the sequence of bases. This sequence determines the order of amino acids in proteins, guiding all cellular functions. The backbone, made of sugar and phosphate, provides the structural framework, but the bases are the parts that actually carry and interpret the genetic information. Unwinding DNA is done by enzymes, not by the bases themselves.

Nitrogenous bases are responsible for encoding genetic information by forming the rungs of the DNA ladder and pairing specifically to hold the two strands together. Adenine pairs with thymine and guanine pairs with cytosine, creating a stable, complementary structure that stores the genetic code in the sequence of bases. This sequence determines the order of amino acids in proteins, guiding all cellular functions. The backbone, made of sugar and phosphate, provides the structural framework, but the bases are the parts that actually carry and interpret the genetic information. Unwinding DNA is done by enzymes, not by the bases themselves.