Protein Synthesis Summary (1 Viewer)

[gloworm14]

I've just been studying for biology and i thought this page of my book sums up the protein synthesis process pretty clearly.
I just wanted to share it with people who find it confusing to understand.
sorry if its a bit too small.

 

[midifile]

My teacher gave that to us...

I remember it being quite good

=]

 

[jortari]

thanks heaps !!

 

[soho]

yay biozone. love that stuff.

 

[Will Shakespear]

That's all wrong, seriously

Firstly you need between steps a and b
- Transcription factors bind to the promoter region of the gene
- RNA Polymerase II binds to the transcription factors

also, between 4 and 5 you need, for the mRNA
- splicing to remove introns
seriously if the mRNA just goes in the ribosome without splicing, it's going to produce nothing of any use... we're not prokaryotes here guys

and for the tRNA
- aminoacyl-tRNAsynthetase charges tRNA with an amino acid

you should also specify that the first tRNA is always the one carrying methionine, and it goes into the P-site of the ribosome to begin the peptide chain, whereas the subsequent tRNAs go in the A site before proceeding to the P site

The answers for Section 3 are just ridiculous
cells are pretty much always going to have the necessary amino acids, if not then you'd be in a lot of trouble
and the second answer is just flatly wrong, if a particular protein is to be made then of course the right gene is going to be read :S

the answer to 3 might be something like
- repressor proteins are deactivated by the presence of an inducer
- enhancing transcription factors are present