When a mRNA( messenger RNA) leaves the nucleus it enters the cytoplasm. A group of ribosomes attract the mRNA, an attachment can then be formed. This attachment is known as a polysome.
tRNA( transfer RNA) on the other hand binds with its respective amino acid. This is determined by the anti-codon on the CCA end of the tRNA. A tRNA-amino acid complex is then formed.
The tRNA-amino acid complex is attracted to the codon of the mRNA by its anti-codon using complementary base pairing.
In its simplest form when the mRNA attaches itself to the ribosome, the first tRNA-amino acid complex will then be attracted to the first codon on the mRNA. Similarly a second tRNA-amino acid complex will arrive and will be attracted to the second codon on the mRNA. The ribosome will then hold the mRNA and tRNA complex together until the amino acids are joined by a peptide bond. The ribosome will continue along the codons of the mRNA for each respective amino acid that arrives. A peptide chain would be formed by these amino acids. However the chain need to stop at some point. At this point a termination code or nonsense code will be used. When the ribosome reaches this code the chain will be cut off. The polypeptide chain will then form its relevant protein structure
If you use some images with content then it will be easy to learn.
ReplyDeletethanks for the tip Maria I'll take that into consideration next time
ReplyDeleteYeah Adrelle, I agree with Maria. As I read this article, it gives me a headache because there are terminologies that aren't familiar to me. So I guess, it is better if you elaborate more and post some related images. :)
ReplyDelete- Marylou
What organelles are studded with ribosomes and carries out protein synthesis?
ReplyDeleteI guess it does sound a bit comnfusing. If anyone has a link to a better explanation please post it in your next comment. Thank you.
ReplyDelete