This is an extract of our Introduction To Metabolism document, which we sell as part of our BIOL10212 Biochemistry Notes collection written by the top tier of University Of Manchester students.
The following is a more accessble plain text extract of the PDF sample above, taken from our BIOL10212 Biochemistry Notes. Due to the challenges of extracting text from PDFs, it will have odd formatting:
vBiochemistry - Lecture 14 (15/03/2018)
Introduction to Metabolism
Metabolism: Entire network of chemical reactions carried out by living cells.
Metabolites: Small molecules that are intermediate in the biosynthesis or degradation of biopolymers.
Classes of Metabolic Pathways:
Catabolic Reactions (Catabolism):
Complex molecules broken down to release energy stored in chemical bonds
Complex molecules made from simpler ones to store energy in chemical bonds.
Multistep Pathways (Instead of Single Step Combustion):
This releases energy in smaller units, so it can be used by cells.
Each individual reaction requires one enzyme.
Similar in all organisms.
This occurs inside specific organelles in eukaryotic cells.
This is regulated by key enzymes that can be inhibited or activated
Characteristics of Metabolic Pathways:
This allows the response to environmental changes.
This avoids futile cycles (unless necessary).
They are often irreversible, yet some internal reactions are reversible.
Flow of material (flux)
This depends on: The supply of substrates, the removal of products and the pathway enzyme activities (i.e. Rates of reactions).
Buy the full version of these notes or essay plans and more in our BIOL10212 Biochemistry Notes.