protein synthesis Flashcards
what are the 2 steps of protein synthesis
nuclear (transcript)
cytoplasmic (translation)
name the 3 transcription process
- messenger RNA (mRNA)
- Ribosomal RNA
3.Transfer RNA (tRNA)
where does the transcription happen?
in the nucleus
what gets transcribed?
RNA polymerase transcribes DNA into RNA
what happens with the first stage in transcription
messenger RNA (mRNA)
Directs synthesis of polypeptide
what happens in the second stage of transcription
Ribosomal RNA
Part of ribosomes
what happens in the third stage of transcription
Transfer RNA (tRNA)
Carries amino acids to ribosome for reaction
what are the three different RNA that is required in translation
messenger
transfer
ribosomes
what does message RNA do
translates from the nucleus (mRNA)
what does transfer RNA do
carries amino acids (tRNA)
what does ribosomes do
ribosomes to do the actual work containing ribosomal RNA (rRNA)
first step in protein synthesis
initiator RNA attaches to a start codon
second step in protein synthesis
ribosomal subunits join to form ribosome and initiator tRNA fits into position on the ribosome
third step in protein synthesis
anticodon of incoming tRNA pairs with next mRNA codon beside initiator tRNA
fourth step in protein synthesis
amino acid on initiator tRNA forms a peptide bond with amino acid beside it
