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 about the antioxidant activity of sugar, Explain about the Antioxid...

Explain about the Antioxidant Activity of Sugar? Several carbohydrates are tremendous scavengers for metal ions. Glucose, fructose and sugar alcohols (sorbitol and mannitol) ha

Sheep-pox, Sheep-pox Sheep-pox, a highly contagious disease, causes a m...

Sheep-pox Sheep-pox, a highly contagious disease, causes a mortality of 20 to 50% in animals below the age of 6 months. It also causes damage to the wool and skin in adults. Of

Explain risk management, Explain Risk Management Risk Management :  ...

Explain Risk Management Risk Management :  The  process  of weighing  policy  alternatives  to accept, minimize or reduce assessed risks and  to select and  implement approp

Define tips for elders with chewing difficulty, Define Tips for elders with...

Define Tips for elders with chewing difficulty? Elders, without teeth cannot chew their foods, hence they start taking only liquid or semi-solid food. Thus, the quantity of nut

Physiological condition for growth, PHYSIOLOGICAL CONDITION FOR GROWTH - ...

PHYSIOLOGICAL CONDITION FOR GROWTH - It depends on anabolism and cetabolism. If anabolism is more positive growth. If both are balanced growth is zero. If cetabolism is more

What is the ecological role of earthworms, Q. What is the ecological role o...

Q. What is the ecological role of earthworms? Earthworms have an important ecological role as they eat decomposing organic material. They also dig tunnels in the subsoil allowi

Name the three main arthropod classes, How are the three main arthropod cla...

How are the three main arthropod classes characterized according to the body division? In crustaceans and arachnids the head is fused with the thorax forming the cephalothorax.

Tools of lower paieolithic age, Tools of lower paieolithic age Pleistoc...

Tools of lower paieolithic age Pleistocene times there were huge herds of very large mammals. Bones of such large mammals were found associated with the human fossil finds and

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