Hey guys
I'm curious why protein chains form into helix and pleated structures, as opposed to any other structure that is possible. I haven't been able to find an explanation for this. I know that the secondary structures coil, thought I don't know why that is helpful yet either. We haven't covered how proteins work yet.
Many thanks
Corey
Hi Corey,
I'm pretty sure these alpha helices and beta pleated sheets form because of the attractions between hydrogens in the amino acids in the polypeptide chains, as these shapes are held by hydrogen bonding.
Hi
I have a test coming up on a practical experiment.
The experiment was the dialysis-tubing experiment, the one where diffusion and movement across a semi-permeable membrane is modelled.
What should I prepare for the best marks?
How should I prepare for the best marks?
What is the best study technique?
All help appreciated!
Hi Bhrugu,
As well feeling comfortable with diffusion/semipermanent membrane content, it would be good to have an understanding of experimental design stuff such as differences between systematic and random errors and examples specific to this prac, and also differences between the terms validity, accuracy, reliability and precision and how they relate to your results. Maybe practice writing a conclusion to your prac using your results to make sure you understand why you've gotten those results and brainstorm possible causes of error if your results aren't as expected.
Centrioles are formed by modified microtubules and other proteins.
How exactly are they formed
During facilitated diffusion using carrier proteins can they bind more than one specific solute at a time
Hi Chocolatepistacio,
I'm not super sure about how centrioles are formed, but since they are made from proteins, all the individual polypeptide chains in the centriole would follow the normal protein synthesis pathway of transcription of a gene in the DNA into mRNA and then translation of the mRNA by the ribosome creating the polypeptide.
It depends on the specific type of carrier protein. Some can only do one at a time, others have binding spots for more than one.
For example the Na+/K+ ion pump has binding spots for 3Na+ and 2K+molecules each time. However there are other carrier proteins that can only transport one molecule at a time. ((wait now I'm over-thinking whether ion pumps are carrier proteins, they are aren't they??))