BRAINCAKEThe role of tRNA, mRNA and rRNA
There are three types of RNA: mRNA, tRNA and ribosomal RNA or rRNA.
RNA has a sugar-phosphate backbone made of ribose and phosphate groups linked together by phosphodiester bonds.
Thymine in DNA is replaced by uracil in RNA.
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Key terms in this lesson
- complementary base pairing
- The specific pairing of bases in nucleic acids: adenine with thymine (or uracil), and cytosine with guanine, held together by hydrogen bonds.
- codon
- A sequence of three bases on mRNA that codes for a specific amino acid.
- gene
- A length of DNA that codes for a specific polypeptide.
More in Biological Molecules
- Continuous and Dis-continuous Replication
- Replication Errors
- The Genetic Code
- Protein Synthesis
- Transcription
- Splicing
- Translation
- ATP
All 63 lessons in Biological Molecules · All OCR AS-level Biology topics