Question

Does the site of protein synthesis differ in prokaryotes and eukaryotes?

Answer 1

Yes, In prokaryotes, ribosomes attach and protein synthesis begins before RNA is even completely transcribed because the DNA is in the cytosol along with the ribosomes. Eukaryotes produce RNA and modify it in the nucleus before exporting it to the cytoplasm where protein synthesis begins.

Also, one strand of prokaryotic RNA can be polycistronic (code for multiple proteins) while eukaryotic RNA only codes for one.protein at a time.

Answer 2

hope this helps

Answer 3

i'm still not clear about the eukaryote. isn't the site for protein synthesis for eukaryote is in ribosome also?

Answer 4

Prokaryotic DNA lacks introns, so mRNA can be translated *immediately* after transcription. Ribosomes often line up along a strand of mRNA to being translating it, much like beads on a string, even while the mRNA is still being transcribed. That rapid-fire change from gene to mRNA to protein could never happen in eukaryotes.

During the act of translation itself, eukaryotes use ribosomes that are slightly larger and more complex than prokaryotic ribosomes. Each type of ribosome has a sedimentation number which describes when and where it settles in a centrifuge. Eukaryotic ribosomes are 80S while prokaryotic ribosomes are only 70S. Okay this is more info I hope its more clear to you now ;)

Answer 5

so, the site of protein synthesis is the same but the process is a little bit different, right?

Answer 6

right

Answer 7

okey, thanks a lot for your help :)

Answer 8

Yup anytime :)