Unit 4 Transcription phases

Question 1

Phase 1 initation

Answer 1

1. ribosome see’d 5’ cap and clamps mRNA
2. initator tRNA goes into P site

initator tRNA has anti codon for AUG and meth anino acid

Question 2

Phase 2 elongation

Answer 2

1. anti codon hydrogen bonds with codon
2. new tRNA enters A site
3. amino acid on initiator tRNA forms peptide bonds making a polypeptide chain
4. repeat

Question 3

phase 3 termination

Answer 3

1. tRNA will read a stop codon and stop
2. release factor protiens will release polypeptide chain