Starting with mRNA in the cytoplasm, how are polypeptides produced?

The mRNA binds to a ribosome at the start codon. (1) The ribosome has a space for a tRNA molecule with a three base anticodon to bind to the complementary codon on the mRNA.(2) The tRNA brings the specific amino acid (3) which starts the polypeptide chain. Then the ribosome moves along to the next codon and binds another tRNA (4). The amino acids from the two tRNA molecules form peptide bonds by a condensation reaction to form the polypeptide (5) and this is repeated until the ribosome reaches a 'stop' codon.(6)

Answered by Alice T. Biology tutor

1945 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Describe what each point of an ECG represents.


Why is glycogen suitable for energy storage in cells?


Give one reason as to why is it important that Carbon dioxide (CO2) is removed from the blood ?


How are epigenetics involved in regulating gene expression?


We're here to help

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