bio q

DNA vs. RNA

Structure

• DNA (Deoxyribonucleic Acid)

  • Double-stranded helix structure.

  • Contains the sugar deoxyribose.

  • Composed of four nitrogenous bases: Adenine (A), Cytosine (C), Guanine (G), and Thymine (T).

• RNA (Ribonucleic Acid)

  • Single-stranded structure.

  • Contains the sugar ribose.

  • Composed of four nitrogenous bases: Adenine (A), Cytosine (C), Guanine (G), and Uracil (U) (Uracil replaces Thymine).

Function

• DNA

  • Serves as the genetic blueprint for the development, functioning, growth, and reproduction of all known organisms.

  • Encodes genes that direct the synthesis of proteins.

• RNA

  • Acts as a messenger carrying instructions from DNA for controlling the synthesis of proteins (mRNA).

  • Plays roles in various biological roles including transfer (tRNA), ribosomal (rRNA), and regulatory functions.

Key Differences

• Strands: DNA is double-stranded, while RNA is single-stranded.

• Sugar: DNA contains deoxyribose; RNA contains ribose.

• Nitrogenous Bases: DNA uses Thymine (T), whereas RNA uses Uracil (U) in place of Thymine.