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

Protoplasm, physical properties of protoplasm

physical properties of protoplasm

Explain acidic stains (anionic) - types of stains, Explain Acidic Stains (a...

Explain Acidic Stains (anionic) - Types of Stains? These are sodium, potassium, calcium or ammonium salts of coloured acids, which on ionization give negatively charged chromog

What are homologous chromosomes, What are homologous chromosomes? Which are...

What are homologous chromosomes? Which are the human cells that do not have homologous chromosomes? Chromosomes have genes (genetic information in the form of nucleotide sequen

Find out the electric potential, Find the electric potential, taking zero a...

Find the electric potential, taking zero at infinity, at the upper right corner (the corner without a charge) of the rectangle in the figure. (Let y = 3.7 cm and x = 6.7 cm.)

Complications in dyslipidemia, Q. Complications in dyslipidemia? The co...

Q. Complications in dyslipidemia? The complications include: • Pancreatitis • Progressive atherosclerosis or asymptomatic coronary. Excess of triglycerides (hypertrigl

Determine the human genome project, List three important discoveries that r...

List three important discoveries that resulted from the Human Genome Project. Answers should contain three of the following: Only about 2 percent of the human genome encodes p

Where do the photochemical stages of photosynthesis occur, Where do the pho...

Where do the photochemical and the chemical stages of photosynthesis occur? The photochemical stage of the photosynthesis process happens mainly on the thylakoids (the green pa

Zoology, right classification of protozoa up to class

right classification of protozoa up to class

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