Protein Synthesis!
Translation and Transcription whoo
Translation:
What: DNA to mRNA
Where: in the nucleus
Why: because proteins are located on ribosomes and are located outside the nucleus, but DNA has to stay inside the nucleus. mRNA can travel outside the nucleus and carry the message.
How: the DNA is unzipped, the RNA polymerase comes through and uses base pairing rules to make a complementary mRNA molecule. Then the mRNA molecule leaves the nucleus to deliver its message.
Translation
What: mRNA to proteins
Where: in the cytoplasm (on the ribosome assembly site)
Why: mRNA and tRNA work together with the ribosome to create a polypeptide chain, or protein, which is important because proteins control your characteristics.
How: mRNA attaches to the binding site on the small subunit, then the tRNA comes and fits into the P-site carrying its amino acid (and anticodon) and then another tRNA comes with its amino acid (and anticodon) and fits into the A-site. The amino acids form a peptide bond, the first tRNA is kicked out, the tRNA in the A-site moves to the P-site, and the process repeats until a stop codon is reached.
I recalled this all from memory as a way of studying while not getting up from the couch: let’s see how I did!
I did pretty good!! I got everything right about transcription, and I got all the details correct about the “how” of translation. I can work on the “why” of translation:
mRNA carries the code from the DNA in the nucleus to the ribosome in the cytoplasm so the mRNA message can be converted into protein.
And I can simplify the how:
mRNA attaches to a ribosome which “reads” the mRNA codons. A tRNA molecule carries the matchinf anticodon, and the tRNA links the amino acids together to make the protein.
Best of luck to everyone studying for finals!! I hope you may have found this interesting or useful
But if you didn’t that’s okay because it helped me study! ☺
It’s a bitch!
