1. Protein Synthesis
Miss Richardson
SBI4U

2. Gene expression the transfer of genetic information from DNA to RNA to protein
The Central Dogma

3. RNA There are three types of RNA in protein sythesis:
messenger RNA (mRNA)
Single-stranded copy of original DNA strand
Carries code for more than one gene
transfer RNA (tRNA)
Single-stranded
Acceptor stem attaches to amino acid
Anticodon loop contains complement of mRNA codon
ribosomal RNA (rRNA)
Single-stranded made of 2 subunits that make a functional ribosome
‘Reads’ the mRNA and assembles proteins
RNA

4. RNA

5. Protein Synthesis Protein Synthesis involves two stages:
Transcription – mRNA is synthesized from DNA template
Translation – protein is synthesized from mRNA template
Protein Synthesis