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 iron uptake by cells, Explain Iron Uptake by Cells? Iron partic...

Explain Iron Uptake by Cells? Iron participates in a large number of biochemical reactions. However, for iron to perform any function, it first needs to be taken up by the cell

Water cycle-hydrological cycle, Water Cycle (Hydrological Cycle) The mo...

Water Cycle (Hydrological Cycle) The movement of water on the earth is continuous and forms many complex inter-related loops (Figure shown below). Cycling of water involves atm

Calculate the number of drops of the stock solution, Assume that you have a...

Assume that you have a stock solution of epinephrine at a concentration of 1mg/ml. Further assume that there are 20 drops/ml. a. Calculate the number of drops of the stock solution

Common endocrine disorders, COMMON ENDOCRINE DISORDERS: We  shall  foc...

COMMON ENDOCRINE DISORDERS: We  shall  focus on  two conditions Diabetes mellitus and Diabetes inspidus.  Diabetes Mellitus  Diabetes mellitus (DM) is a disorder of gl

Explain monosaccharides, Monosaccharides :- Sugars consisting of  a  sin...

Monosaccharides :- Sugars consisting of  a  single  polyhydroxy  aldehyde or ketone unit.

What is the function of the iris and of the pupil, What is the function of ...

What is the function of the iris and of the pupil? The iris works like the diaphragm of a photographic camera as it has muscles that contract or relax varying the pupil diamete

State the prevention of campylobacteriosis diseases, State the prevention o...

State the prevention of Campylobacteriosis Prevention: the various ways to prevent campylobacteriosis are: Wash hands before preparing foods. Wash hands immediatel

What is ammensalim, Q. What is ammensalim? The Ammensalism is the ecolo...

Q. What is ammensalim? The Ammensalism is the ecological interaction in which an individual harms another without obtaining benefit. The Ammensalism is an inharmonious (negativ

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