Describe the stages in DNA transcription and translation

DNA is unziped by DNA helicase. RNA polymerase catalyses the formation of a complementary strand of pre-mRNA, using the non-coding strand of DNA as a template. The pre-mRNA contains non-coding regions (introns) which are removed through splicing to form mature-mRNA. As the mRNA is single stranded, it can leave the nucleus via the nuclear pores and bind to a ribosome on the rough endoplasmic retIculum (rER). Starting with the 'start' codon, each codon on the mRNA sequence is read in order. The amino acid which corresponds with each codon is carried by a tRNA to the ribosome. Adjacent amino acids form peptide bonds which results in the formation of a long chain of amino acids, or a polypeptide.

Answered by Iona N. Biology tutor

2443 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Describe the process of transcription for a gene


Describe how Carbon Dioxide is assimilated in the Calvin cycle.


What is the purpose of mitosis and explain the stages


Explain how a synapse between two neurons functions


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences