Question

Substance common in DNA and RNA is

• A. Hexose sugar
• B. Histamine
• C. Thymine
• D. Phosphate groups

Answer 1

Answer: (D)

Phosphate groups

DNA and RNA both are nucleic acids made up of deoxyribonucleotides and ribonucleotides respectively. Deoxyribonucleotides are made up phosphoric acid and deoxyribonucleosides. Ribonucleotides are made up of phosphoric acid and ribonucleosides. The deoxyribonucleosides and ribonucleosides differ in the sugar present in them as well as the nitrogenous bases present are different. In both deoxyribonucleotides and ribonucleotides, the phosphoric acid is the common component.

So, the correct answer is option D.