The bases in DNA (and RNA) are more accurately described as _____ bases.

• A. phosphoric
• B. sulfur-containing
• C. alkaline
• D. nitrogenous

Answer: (D)

Verified step by step guidance

1. Understand that DNA and RNA are nucleic acids composed of nucleotides, each containing a sugar, a phosphate group, and a base.
2. Recognize that the bases in DNA and RNA are the components that carry genetic information and are classified based on their chemical structure.
3. Recall that these bases contain nitrogen atoms, which is why they are called nitrogenous bases.
4. Note that the other options (phosphoric, sulfur-containing, alkaline) do not accurately describe the chemical nature of the bases themselves.
5. Conclude that the correct term to describe the bases in DNA and RNA is 'nitrogenous bases' because they contain nitrogen and are fundamental to genetic coding.