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

Environment , Environment All organisms are intimately dependent on the ...

Environment All organisms are intimately dependent on the environment from which they derive their sustenance. Organisms from virus to man are obligatorily dependent on the envi

State problem of hypoglycaemia when driving, Hypoglycaemia When Driving ...

Hypoglycaemia When Driving Hypoglycemia is particularly dangerous if it happens to someone who is driving. People with hypoglycemia may have trouble concentrating or se

Evolution , What benefits led to natural selection of a two-circuit pump f...

What benefits led to natural selection of a two-circuit pump function of the heart a) One circuit to go from the heart to the body and one from the heart to the lungs b) One cir

What is cross contamination, Q. What is cross contamination? Cross cont...

Q. What is cross contamination? Cross contamination is the passage of micro-organisms from one person to another via any route direct or indirect.

Explain sterilization, Explain Sterilization The physical process of ...

Explain Sterilization The physical process of killing microorganisms, including pathogenic and the bacteria,  vegetative forms and other spores on or in an inanimate object o

Male reproductive disorders-aplasia of epidydimis, Aplasia of epidydimis ...

Aplasia of epidydimis This condition is seen in only 1 or 2 % of young bulls and is marked by absence of one (more common) or both epididymis. Bulls having a single epidydimis

Determine the antagonist of the glycine receptor, Person Z swallowed a larg...

Person Z swallowed a large amount of substance X and, as a result, has convulsions (abnormal violent contractions of skeletal muscles).  Swallowing which of the following substance

Explain the position of the endospore, Explain the Position of the endospor...

Explain the Position of the endospore? Endospore cannot be stained by ordinary methods such as simple staining and gram staining because these dyes do not penetrate the wall of

What is the purpose of dna, What is the purpose of DNA? Actually, DNA m...

What is the purpose of DNA? Actually, DNA makes you who you are. It has all your heredity info, like your hair color, your personality, etc. No two person's DNA is the similar,

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