Question

Phosphorus is present in:

• A. DNA
• B. RNA
• C. Protein
• D. Both (A) and (B)

Answer 1

The correct option is D

Both (A) and (B)

The correct option is D:

Explanation of the correct option:

1. Nucleic acids include DNA and RNA.
2. A nitrogenous base, phosphate, and the sugar pentose make up nucleic acids.
3. Phosphorus is found in both DNA and RNA, as it is the nucleic acid's backbone. The presence of phosphoric acid causes nucleic acids to be acidic.
4. Phosphate + sugar + nitrogenous base = nucleic acid
5. DNA is made up of deoxyribose, a nitrogenous base, and phosphate.
6. RNA is made up of ribose, a nitrogenous base, and phosphate.

Explanation of the incorrect option:

Option C:

Protein is made up of amino acid

Final answer: Phosphorus is present in DNA and RNA.