Summary
Summary OCR A/AS-Level Biology 2.4.2 Cofactors and Coenzymes
Revision Summary of key knowledge from OCR A/AS-Level Biology 2.4.2 Cofactors and Coenzymes.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Seller
Follow
Content preview
Enzyme Cofactors andCoenzymes
Cofactors
Some enzymes require an additional non-protein component to function properly and
cannot function alone
Cofactors are small molecules that ensure an enzyme-catalysed reaction takes place
Two types: pure cofactors and coenzymes
Pure Cofactors
Inorganic – minerals or metal ions
Help enzymes function properly
More involved and assist in catalysis
Some bind temporarily to ease the formation of an ESC by:
o Binding to substrate to form a co-substrate with the correct shape
o Binding to the active site to form the correct shape
o Affecting the charge in either the enzyme or substrate which makes the
temporary bons in an ESC easier to form
Coenzymes
Organic – vitamins or vitamin derivatives
Carrier molecules and only carry substances to/from enzymes
Temporarily bond to the enzyme either just before or at the same time as the substrate
Chemically changed by the reaction and must be recycled by a different enzyme
Prosthetic Groups
Cofactors which are permanently bonded to an enzyme’s active site
Vitamins
B-vitamins are the precursors of coenzymes
A lack of vitamins can lead to deficiency which can result in disease
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller izzylewington04. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
66579 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now