Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
The RNA backbone refers to the chain of molecules that make up the structural framework of an RNA molecule. It is composed of repeating units called nucleotides, which are connected by phosphodiester bonds.
A building block of DNA and RNA, consisting of a sugar molecule (ribose in RNA), a phosphate group, and a nitrogenous base.
Phosphodiester bond: The chemical bond that connects adjacent nucleotides in both DNA and RNA backbones.
Ribose: The specific sugar found in the backbone of an RNA molecule. It has five carbon atoms and plays a crucial role in forming the structure of RNA.