RNA Structure in a Snap! Unlock the full A-level Biology course at [ Ссылка ] created by Adam Tildesley, Biology expert at SnapRevise and graduate of Cambridge University.
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The key points covered of this video include:
1. RNA
2. The Structure of RNA
3. Comparing DNA to RNA
RNA
As well as DNA, another important nucleic acid is ribonucleic acid (RNA). RNA has different but equally key roles in organisms: RNA acts as a messenger molecule - it helps transfer information from DNA to proteins, RNA also has roles in the regulation and synthesis of proteins, Like DNA, RNA is also a polynucleotide - it is a polymer made up of nucleotide monomers
Structure of RNA
Unlike DNA, RNA is composed of only one polynucleotide chain - it is single-stranded. RNA polynucleotide chains are also shorter than DNA chains. RNA nucleotides also differ from DNA in molecular structure: The pentose sugar in RNA is ribose, The nitrogen-containing organic bases are guanine (G), adenine (A), cytosine (C) and uracil (U), Guanine and adenine are purine bases (two-carbon rings), Cytosine and uracil are pyrimidine bases (one-carbon ring).
Comparing DNA to RNA
The differences between RNA and DNA can be summarised in a table.
Summary
RNA is a short, single-stranded nucleic acid
RNA nucleotides contain the pentose sugar ribose
RNA nucleotides contain the organic bases guanine, adenine, cytosine and uracil
