Define hexokinase, Biology

Assignment Help:

Hexokinase, that catalyzes the first irreversible step of glycolysis, is inhibited by glucose 6-phosphate.   Thus  when  PFK  is  inhibited and  fructose  6-phosphate builds  up and so does glucose  6-phosphate  due to these two metabolites  are in equilibrium  by phosphoglucoisomerase. Hexokinase inhibition then reinforces the inhibition at the PFK step. At first sight this seems commonly as it is usually the first irreversible step of a pathway (the committed step) that is the major control step. On this basis, it may appear in which hexokinase should be the main control enzyme not PFK.  Furthermore,   glucose 6-phosphate the product of the hexokinase reaction can also feed into glycogen synthesis or the pentose phosphate pathway. Thus the first irreversible step which is exclusive to glycolysis is which catalyzed by PFK and therefore this is the main control step.

 


Related Discussions:- Define hexokinase

General protocol for media preparation, General Protocol for Media Preparat...

General Protocol for Media Preparation A general protocol for media preparation is as follows: 1. Prepare stock solutions one day before the medium is to be made. 2. Wei

Define application of nutrition knowledge in geld of sports, Define Applica...

Define Application of Nutrition Knowledge in Geld of Sports? By the time you are ready to do this unit, you have been exposed to a good deal of the basic knowledge of nutrition

Explain anaerobic nitrogen-fixer, One of the free-living, anaerobic nitroge...

One of the free-living, anaerobic nitrogen-fixer is: 1. Beijernickia 2. Rhodospirillum 3. Rhizobium 4. Azotobacter Rhodospirillum

What is nucleus where it is found, What is nucleus where it is found? ...

What is nucleus where it is found? Nucleus :  The nucleus is present only in eukaryotic cells. It is the control center and is generally found in the center of the cell. The

What is the essential morphology of a protozoan cell, Q. What is the essent...

Q. What is the essential morphology of a protozoan cell? Protozoans are eukaryotic cells so they have structures and organelles common to this kind of cell endoplasmic reticula

Determine the assess mobility of prosthesis, Assess Mobility of Prosthesis ...

Assess Mobility of Prosthesis All implant-supported prostheses must be stable.  To detect mobility, place an explorer or scaler under the embrasures and apply gentle pressure i

Explain haart, Patients Not on HAART For HIV-infected patients requiri...

Patients Not on HAART For HIV-infected patients requiring TB treatment who are not currently being treated with highly active antiretroviral therapy (HAART), it may be prudent

What is linkage, What is linkage? Two genes are assumed to be under lin...

What is linkage? Two genes are assumed to be under linkage, or linked, when they reside in the same chromosome. For instance, the research of the human genome discovered tha

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd