100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
L13 - Introduction to Metabolism £2.99   Add to cart

Lecture notes

L13 - Introduction to Metabolism

 2 views  0 purchase

Lecture by Dr Alison Snape

Preview 2 out of 14  pages

  • August 11, 2022
  • 14
  • 2019/2020
  • Lecture notes
  • Dr alison snape
  • All classes
All documents for this subject (13)
avatar-seller
aurelianatasyaa
L13 – Introduction to Metabolism


Define the terms: metabolism, anabolism and catabolism
Slide 4 – Definition of Metabolism

• ‘The totality of the chemical reactions and physical changes that occur in living
organisms, comprising anabolism and catabolism’
• The enzyme reactions of synthesis, breakdown and interconversion of essential
biomolecules


Slide 5 – Overview of Metabolism

• Catabolism: the metabolic breakdown of complex substances into smaller products –
including the breakdown of carbon compounds with the liberation of energy for use by
the cell or organism
• Anabolism: the energy requiring part of metabolism in which simpler substances are
transformed into more complex ones
- As in growth or other biosynthetic processes




Give examples of anabolic and catabolic pathways
Slide 6 – Metabolism

• Lysis: breaking down
• Genesis: making something new
• Gluconeogenesis: making new glucose
• Lipogenesis: making fat

, • Happens in the cytosol




Explain the concept of controlled release of energy in enzyme catalysed metabolic
pathways
Slide 7 – Stepwise breakdown releases energy in useable small ‘packages’

• First: energetically favourable reaction, releasing a large amount of energy
• Second: Breaking down sugar by small steps
- Allow release of manageable packages of energy that can be stored in cells and
transfer and use somewhere else
- Each reaction or step has a smaller activation energy
- Enzymes help overcome activation energy and allow these reactions to occur at a
useful rate in the cells




Slide 8 – Pathways can be regulated by regulation of specific enzymes

• If you have an enzyme 2 (catalyses interconversion of B to C and C to B aka a reversible
reaction), the direction of the reaction will be driven by the relative concentrations of B
and C (Le Chatelier’s principle)
- Enzyme will catalyse the reaction going in both directions
• Irreversible reactions allows us to that level of control to be able to convert it from A to E

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 aurelianatasyaa. 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)

83225 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