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)
AT
Related Biology A Level answers
All answers ▸Why are some DNA mutations sometimes not dangerous, and which type of mutations are these likely to be?
How does the body increase heart rate in response to exercise?
Describe the role of the thylakoid membrane.
State 3 organelles found in a Eukaryotic cell and the functions of each organelle.