100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Summary OCR A/AS-Level Biology 2.4.1 Enzymes £2.99   Add to cart

Summary

Summary OCR A/AS-Level Biology 2.4.1 Enzymes

 8 views  0 purchase

Revision Summary of key knowledge from OCR A/AS-Level Biology 2.4.1 Enzymes.

Preview 1 out of 2  pages

  • No
  • Chapter 2.4.1
  • June 26, 2023
  • 2
  • 2022/2023
  • Summary
book image

Book Title:

Author(s):

  • Edition:
  • ISBN:
  • Edition:
All documents for this subject (5)
avatar-seller
izzylewington04
Enzymes
What are Enzymes?
 Biological catalysts – chemicals that speed up the rate of a reaction and remain
unchanged and reusable at the end of the reaction
 Lower the activation energy of chemical reactions by influencing bond stability
 Lower activation energy creates an unstable transition state in the substrate from which
the reaction proceeds steadily
 Lower activation energy allows metabolic reactions to occur at body temperature
 The number of reactions an enzyme can catalyse per second is known as the turn-over
rate
 Enzymes are globular proteins with hydrophobic R groups on the outside, making them
water-soluble
 They have a specific, 3D tertiary structure
 The active site of an enzyme is an indented area with a shape that is specific to the
complementary substrate molecule

Intracellular Enzymes Extracellular Enzymes
 Performs its function within the cell  Performs its function outside of the cell
that produces it that produces it

Metabolic Pathways
 A series of consecutive reactions that are each catalysed by a specific enzyme and result
in a specific product
 Various reactants and intermediates act as substrates for specific enzymes
 These reactants, intermediates and products are called metabolites
 In catabolic pathways, metabolites are broken down into smaller ones and release
energy
 In anabolic pathways, energy is used to synthesise larger metabolites from smaller one

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

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)

83662 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

Start selling
£2.99
  • (0)
  Add to cart