Search found 3 matches

by qwertyqwerty
Wed Aug 15, 2012 1:46 am
Forum: Molecular Biology
Topic: What is a non-integral repeat in an alpha helix?
Replies: 3
Views: 8108

What is a non-integral repeat in an alpha helix?

What exactly is a non-integral repeat in an alpha helix and how does it arise? I was doing a question: An a helix is a form of protein secondary structure with 3.6 residues per turn of helix. The non-integral repeat arises because it: a) allows the formation of base pairs on the inside of the helix ...
by qwertyqwerty
Wed Aug 15, 2012 1:18 am
Forum: Molecular Biology
Topic: Polypeptide chainwith 21 basic and 15 acidic residues...
Replies: 1
Views: 6090

Polypeptide chainwith 21 basic and 15 acidic residues...

So if a polypeptide chain of 214 amino acid residues has 21 basic and 15 acidic residues, the protein : a) is amphipathic b) will be positively charged at neutral pH c) unlikely to be found inside cells because it is too highly charged d) will have no net charge at pH 7 e) would be expected to form ...
by qwertyqwerty
Fri Nov 12, 2010 5:37 am
Forum: Cell Biology
Topic: Diffusion of CO2 and chloroplast placement
Replies: 1
Views: 1712

Diffusion of CO2 and chloroplast placement

I know that chloroplast placement relates to increased light exposure and absorption but does the diffusion of CO2 also have something to do with chloplasts being in the top/palisade layer of the leaf? You know, less distance for CO2 to diffuse to in order to reach chloroplast = more CO2 available f...