Integrated SequencePhysics Chemistry Organic Biology

Web Resources

Kimball's Biology Pages - Regulation of Enzyme Activity

The Medical Biochemistry Page - Inhibition of Enzyme Catalyzed Reactions
Excellent, if somewhat challenging treatment. Master this and you will be one step further than the expectations for the MCAT.



  click if a link is broken



Special points of emphasis

Proteins

Bioenergetics and Cellular Respiration

The first irreversible reaction on a biochemical pathway is called the committed step. An example is the phosphorylation of fructose 6-phosphate to fructose 1-6-bisphosphate in glycolysis. It is usually the enzyme catalyzing the committed step which is the control element for the pathway. In glycolysis, this enzyme is phosphofructokinase, such an important enzyme that it definitely might find its way onto the MCAT. The original substrate is committed to the glycolytic pathway after phosporylation by phosphofructokinase. Other alternatives before phosphorylation included the pentose phosphate pathway (for generation of NADPH and five carbon sugars) or polymerization into glycogen.







The WikiPremed MCAT Course is a free comprehensive course in the undergraduate level general sciences. Undergraduate level physics, chemistry, organic chemistry and biology are presented by this course as a unified whole within a spiraling curriculum.

Please read our policies on privacy and shipping & returns.  Contact Us.
MCAT is a registered trademark of the Association of American Medical Colleges, which does not endorse the WikiPremed Course.


Creative Commons License
The work of WikiPremed is published under a Creative Commons Attribution Share Alike 3.0 License. There are elements of work here, such as a subset of the images in the archive from WikiPedia, that originated as GNU General Public License works, so take care to follow the unique stipulations of that license in printed reproductions. You can use the resources here for commercial or non-commercial purposes, but please give attribution and a link to the production credits and edit history of the resource. For the works here which began as my individual work, please attribute "John Wetzel, an author at wikipremed.com".