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

Is the epithelium vascularized, Is the epithelium vascularized? How do nutr...

Is the epithelium vascularized? How do nutrients and oxygen reach the epithelium? Why is this feature a significant evolutionary acquisition? Epithelia are not vascularized (ca

What is the notochord, What is the notochord? How is this structure formed?...

What is the notochord? How is this structure formed? The notochord is a rodlike structure that produces the supporting axis of the embryo and gives birth to the vertebral colum

Explain the endochondral ossification, Explain the endochondral ossificatio...

Explain the endochondral ossification The second type of osteogenesis is endochondral ossification. This process is different from intramembranous ossification in that it occur

Define terms of incubation time and the generation time, If the generation ...

If the generation time (t) is the incubation time (t) per generation (G), or t = t/G, rewrite the formula you derived in question 2 for bacterial population growth in terms of incu

How do cells obtain energy for their functioning, How do cells obtain energ...

How do cells obtain energy for their functioning? Cells obtain energy for their metabolic reactions from the breaking of organic molecules with high energetic content. This ene

Changes in the ions, Changes in the Ions The concentration o...

Changes in the Ions The concentration of potassium, phosphate and nitrate declined significantly in the bathing medium within four days. The concentration of so

Segments that form the body of the tapeworm, Q. What are the segments that ...

Q. What are the segments that form the body of the tapeworm called? What is their function? The body of the tapeworm is made of segments called as proglottids. The proglottids

What substance is the acidic flavor of fermented milk due, Q. To what subst...

Q. To what substance is the acidic flavor of fermented milk due? Some bacteria ferment milk lactose by lactic fermentation producing lactic acid this product is responsible for

Determine the sodium-potassium atpase pumps, A normal healthy cell is bathe...

A normal healthy cell is bathed in a normal extracellular saline.  The plasma membrane of the cell contains voltage-gated sodium channels, sodium-glucose co-transporters, and sodiu

Evolution, Who is the founder of theory survival of the fittest ?

Who is the founder of theory survival of the fittest ?

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