Search found 30 matches
- Tue Oct 04, 2005 6:46 am
- Forum: Cell Biology
- Topic: speed of movement in the cell
- Replies: 1
- Views: 1615
Alberts said that it took an organic molecule one-fifth of a second to travel a distance of 10 microns in a cell. That's one-fourth of a cell's diameter! YOu mean they measure it from end to end?????????????
Hope this doesn't sound a bit toffygoshy but do substrates actually collide or crash into the active site of the enzyme as if by chance or do they migrate in some seemingly predicatble way into the cleft of the active site? And while they remain in the 'cavern' of that cleft, do they seek out hidy h...
The theoretical maxium for kcat/Km is about 108 to 109 (mol/L)-1s-1. At this point, every collision of the enzyme with its substrate will result in catalysis. Some enzymes, such as fumarase, actually approach this limit. My questions are: 1) How do enzymes manage to grab substrates from the solution...
- Thu Sep 29, 2005 7:00 am
- Forum: General Discussion
- Topic: Need help with some bio questions. cant seem to find answers
- Replies: 6
- Views: 4672
How about the buffering capacity of hydrocarbonates in fresh water samples, not to mention the effects of metallic cations and metallic anions? like how about sulphates too?
Has there been any new news on amoebas? Last I read, the cytoplasm is made of sol and gel. The membrane must still be a lipid bilayer, but it is not going to burst in pond water because its got some kind of jelly like substance or maybe an armour or basically a basal laminar that is like kevlar?????...
i know the bits and pieces that go to form the lipid bilayer of a cell membrane. But what is the names of the bits and pieces ?of the bilayer? that keeps the cell membrane from dissolving into a heap of goo within and without? Cn't be phosphate and metal cations only.