RNA - Wikipedia
Ribonucleic acid (RNA) is a polymeric molecule that is essential for most biological functions, either by performing the function itself (non-coding RNA) or by forming a template for the production of proteins (messenger RNA). RNA and deoxyribonucleic acid (DNA) are nucleic acids.

Ribonucleic Acid (RNA) - National Human Genome Research Institute
Ribonucleic acid (abbreviated RNA) is a nucleic acid present in all living cells that has structural similarities to DNA. Unlike DNA, however, RNA is most often single-stranded.

RNA | Definition, Structure, Types, & Functions | Britannica
RNA, complex compound of high molecular weight that functions in cellular protein synthesis and replaces DNA as a carrier of genetic codes in some viruses. RNA consists of ribose nucleotides and the nitrogenous bases adenine, guanine, cytosine, and uracil.

Ribonucleic Acid (RNA) Fact Sheet
Ribonucleic acid (RNA) is an essential molecule that performs many roles in the cell, from carrying the instructions to make proteins to regulating genes. Ribonucleic acid, shortened to RNA, is one of the most versatile molecules of life.

RNA: Properties, Structure, Composition, Types, Functions
RNA (Ribonucleic acid) is a single-stranded nucleic acid molecule and made up of ribonucleotides. A ribose nucleotide in the chain of RNA consists of a ribose sugar, phosphate group, and a base.

What Is RNA? RNA Facts - Science Notes and Projects
Ribonucleic acid or RNA is a nucleic acid found in all living cells. While RNA resembles DNA in many ways, it contains a different set of bases, usually is single-stranded instead of double-stranded, and transcribes DNA so a cell can make proteins.

10.3: Structure and Function of RNA - Biology LibreTexts
RNA molecules perform a variety of roles in the cell but are mainly involved in the process of protein synthesis (translation) and its regulation. RNA is typically single stranded and is made of ribonucleotides that are linked by phosphodiester bonds.

Ribonucleic Acid (RNA): Types, Structure & Their Function
Ribonucleic acid (RNA) is a fundamental biomolecule present in most living organisms and many viruses. It consists of a ribose sugar, phosphate backbone, and nitrogenous bases — adenine (A), guanine (G), cytosine (C), and uracil (U) (in place of thymine in DNA).

The Structure of DNA and RNA – Introductory Biology
There is a second nucleic acid in all cells called ribonucleic acid, or RNA. Like DNA, RNA is a polymer of nucleotides. Each of the nucleotides in RNA is made up of a nitrogenous base, a five-carbon sugar, and a phosphate group. In the case of RNA, the five-carbon sugar is ribose, not deoxyribose.

What is RNA? - RNA Society
For many years RNA was believed to have only three major roles in the cell–as a DNA photocopy (mRNA), as a coupler between the genetic code and the protein building blocks (tRNA), and as a structural component of ribosomes (rRNA).