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

Explain briefly about vitamin B12, Vitamin B 12 (Cyanocobalamin) Vitam...

Vitamin B 12 (Cyanocobalamin) Vitamin B 12 refers to a group of Cobalt-containing corrinoids known as cobalamins. It is also called antipernicious- anemia factor, extrinsic f

What do you mean by zoonoses, Q. What are zoonoses? What are few examples o...

Q. What are zoonoses? What are few examples of zoonoses transmitted by birds? Zoonoses are human diseases transmitted by animals. Psittacosis, a bacterial disease, cryptococcos

Fat soluble vitamin needs of school children and adolescents, Determine Fat...

Determine Fat Soluble Vitamin Needs of school children and adolescents? ICMR (1990) does not give recommendations for vitamin D, E and K. Vitamin D is very important for skelet

Food hygiene, as newly appointed food safety manager within a medium seized...

as newly appointed food safety manager within a medium seized

Define the enzyme function of vitamin c, Define the Enzyme Function of Vita...

Define the Enzyme Function of Vitamin C? Vitamin C acts as an electron donor for 11 enzymes. Three of those enzymes are found in fungi but not in humans. Of the eight remainin

Shrub stage - xerarch, Shrub Stage - Xerarch Sufficient soil is formed...

Shrub Stage - Xerarch Sufficient soil is formed in the herbs stage, for supporting the woody plants or the shrubs. They migrate with the help of seeds or rhizomes from the adj

Explain types known in metabolic pathways, How many regulatory enzyme types...

How many regulatory enzyme types known in metabolic pathways, explain in detail by giving examples.

Stress testing in women, Q.Explain about Stress Testing in Women? Data ...

Q.Explain about Stress Testing in Women? Data on mortality in men is about 2.5 times that of women. At younger ages, however, CAD in men exceeds that found in women by 5 to 1.

Explain venous thromboembolism, Venous Thromboembolism Prolonged immob...

Venous Thromboembolism Prolonged immobilization (>8 hours) increases the risk of lower extremity deep vein thrombosis (DVT), particularly in travelers with risk factors for th

How many different genotypes can the individual present, Considering a pair...

Considering a pair of homologous chromosomes containing a gene having two different alleles how many different genotypes can the individual present? If a gene of a diploid spec

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