What is reaction specificity, Biology

Assignment Help:

Reaction specificity

Some  enzymes  catalyze only one  reaction  acting  on  a specific substrate. Example: urease  and  catalase  acts  only  on  urea and  hydrogen peroxide, respectively. This is also called absolute specificity.

Many  enzymes  can  catalyze same type of reactions  (phosphate  transfer, oxidation-reduction, hydrolysis etc.)  in  several  structurally-related compounds. Example: carboxypeptidase  acts on protein chains and removes one amino acid at a time from the C-terminal, irrespective of the nature of zimino acid.

 A substrate caa undergo many reactions but in a specific reaction, an enzyme will catitlyze  only one  of  these reactions.  Example:  citrate  synthase  converts oxaloacetate to citrate in  the presence of acetyl-CoA. But,  in  absence of acetyl-  CoA, oxaloacetate is acted  upon  by  a different enzyme malate  dehydrogenase with the formation of malate.

 


Related Discussions:- What is reaction specificity

Impulse in the sensory neurone, Explain briefly how the stimulus at the fin...

Explain briefly how the stimulus at the finger produces an impulse in the sensory neurone using the following key words. 1. Energy conversion (linked to receptor) 2. Na+ in 3. Depo

Elongation: what is translocation, A Complex  of  elongation  factor  EF-G ...

A Complex  of  elongation  factor  EF-G  (also known as  translocase)  and  GTP example for  EF-G/GTP binds  to the  ribosome.  There are three concerted movements  now happen coll

What happens within the cell in the third interface period, What are the ev...

What are the events that mark the beginning and the end of the third interphase period? What happens in the cell in this period? The third interphase period is the G2. It star

Digestive system - pancreas, P ANCREAS It is an elongated, leaf lik...

P ANCREAS It is an elongated, leaf like, yellowish or orangish in colour. Lying partly behind stomach. 16 cm long, 2.5 cm. wide & weight about 60 gms. It consists of hea

Taxonmy, classification on taxonomy

classification on taxonomy

List the criteria of implant success, List the criteria of implant success....

List the criteria of implant success. Criteria for implant success as suggested by Albrektsson, Zarb and Worthington are as follows: i) An individual, unattached implant is

Explain the sticky films - food microbiology, Explain the Sticky Films - Fo...

Explain the Sticky Films - Food Microbiology? Sticky films or tape are pressed against the surface to be assessed. Exposed film/tape is then pressed on the agar plate and analy

What are the five classes of vertebrates, Q. What are the five classes of v...

Q. What are the five classes of vertebrates? To which of these do human beings belong? The five classes of vertebrates are amphibians, reptiles, fishes (osteichthyes and chondr

What are risk factors for diseases, Q. What are risk factors for diseases? ...

Q. What are risk factors for diseases? The Risk factors for a disease are everything that contributes to increase the risk of the disease to appear. For example, for most cardi

Define some precautions for estimation of amount of bacteria, Define some P...

Define some Precautions for Estimation of the Amount of Bacteria? 1. Dilution should be made carefully. 2. Use fresh sterile pipette for making each dilution. 3. Aseptic

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