Metabolism - Enzymes III | BIALIGY.com

About this video

• Video Title: Metabolism - Enzymes III | BIALIGY.com
• Channel: BIALIGY
• Speakers: None specified
• Duration: 00:13:47

Overview

This video concludes a series on metabolism and enzymes by discussing metabolic pathways, enzyme inhibition (reversible and irreversible), and enzyme helpers (co-factors and co-enzymes). It explains how these components are crucial for regulating biological processes.

Key takeaways

• Metabolic Pathways: These are organized sets of chemical reactions that define metabolism. They involve a series of steps, each catalyzed by a specific enzyme, transforming one molecule into another to achieve a final product.
• Enzyme Inhibition: This process regulates enzyme activity and can be either reversible or irreversible.
  • Reversible Inhibition: Occurs in two forms:
    • Competitive Inhibition: An inhibitor molecule resembles the normal substrate and competes for the enzyme's active site. It binds temporarily and does not facilitate catalysis.
    • Non-Competitive Inhibition: An inhibitor binds to a site other than the active site, changing the enzyme's shape (conformational change) and preventing the substrate from binding or the reaction from occurring. This also binds temporarily.
  • Irreversible Inhibition: Involves permanent inactivation or destruction of the enzyme, often caused by toxic chemicals like mercury and lead.
• Enzyme Helpers: Enzymes sometimes require assistance to function effectively. These helpers include:
  • Co-enzymes: Typically organic molecules (like vitamins) that bind to enzymes to aid in their function.
  • Co-factors: Typically inorganic substances (like trace metals such as iron, zinc, and magnesium) that assist metabolic processes.