Moderators: honeev, Leonid, amiradm, BioTeam
We are very pleased to announce the website's new design and features. As a biology website pioneer in 2001, it has grown to become the world's most comprehensive online database for biology terms and topics. Thus, we would like to invite you to take part in this significant milestone by checking out these latest features from Biology Online.
The largest online biology dictionary with over 70,000 biology terms! Learn various topics, concepts, and principles in biology. Start by searching here.
Get the latest biology news, insights, trends and discoveries in biology and other related research fields. We have over 5,000 articles you can choose from.
From the basics to the more advanced lessons, our tutorials will help you learn various topics in biology. Browse from over 100 free biology lessons here.
We hold one of the largest discussion boards in biology online! Join our community by signing up here or log in here if you already registered with us before.
Thank you and we hope you will join us as the site continues to grow by leaps and bounds.
Sincerely,
Biology Online Team
-
ManBearPig89
- Garter
- Posts: 28
- Joined: Mon Mar 01, 2010 12:20 am
Post
by ManBearPig89 » Sun May 30, 2010 11:28 am
Hello! I have a question about enzymes...
When looking at the [S] and comparing it to Vmax, does this mean that Vmax is the point when an enzyme can no longer take in any more substrate (moles/ secound?) in it's active site, and when an enzyme is "working hardest" ? I mean, this is when the reaction occours faster (if [S] is high) and slower when [S] is low...
Is the graph showing the rate (=speed?) of reaction in ONE enzyme, or in all the enzymes converting substrate to produckt?
thank you!
-
MrMistery
- Inland Taipan
- Posts: 6832
- Joined: Thu Mar 03, 2005 10:18 pm
- Location: Romania(small and unimportant country)
-
Contact:
Post
by MrMistery » Sun May 30, 2010 4:36 pm
the graph is showing the reaction rate in your test system. there is definitely more than one enzyme molecule there.
at Vmax virtually all enzymes are occupied with substrate molecules. As soon as one molecule of substrate dissociates, another one binds
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
-
JackBean
- Inland Taipan
- Posts: 5694
- Joined: Mon Sep 14, 2009 7:12 pm
Post
by JackBean » Wed Jun 02, 2010 10:12 am
as MrMistery said, the speed is of all enzyme present in the system (well, theoretically, you could probably express it as speed of one enzyme molecule).
However, Vmax or Vlim is relevant only to the high S concentrations! When [S] is low, you have nothing to do with Vlim.
Also, you should actually never reach Vlim, that's why is it V limiting
http://www.biolib.cz/en/main/
Cis or trans? That's what matters.
