Composition, Structure and Function of Biomolecules. #apnasapnajrf #csirnet

Video Summary

The video discusses the composition, structure, and function of Biomolecules, focusing on Carbohydrates, Lipids, Proteins, and Nucleic Acids. The presenter, Komal Sharma, breaks down complex concepts into simpler terms to aid understanding.

Key Scientific Concepts and Discoveries:

• Definition of Biomolecules:
  • Biomolecules are defined as molecules found in living organisms, composed of atoms that interact to form larger structures.
  • They are categorized into two types:
    • Macromolecules (Bio Macromolecules): Large molecules (weight > 1000 Da) such as Proteins, Carbohydrates, and Nucleic Acids.
    • Micromolecules (Bio Micromolecules): Smaller molecules (weight between 18 to 800 Da) such as amino acids and monosaccharides.
• Polymers and Monomers:
  • Polymers: Large molecules made from repeating smaller units (monomers).
  • Monomers: Single units that combine to form polymers.

Examples of Biomolecules:

• Proteins: Polymers made of amino acids (monomers) linked by Peptide Bonds.
• Carbohydrates: Polymers made of monosaccharides.
• Nucleic Acids: Polymers made of nucleotides.
• Lipids: Large molecules that are not polymers, consisting of various components.

Peptide Bonds:

• Peptide Bonds link amino acids to form Proteins.
• Formation Process:
  • Involves a nucleophilic attack and dehydration (removal of H2O).
  • The bond is characterized as polar and covalent, requiring energy for formation (endergonic process).

Structure of Proteins:

• Proteins have various structures:
  • Primary Structure: Sequence of amino acids.
  • Secondary Structure: Local folding patterns (e.g., alpha helices, beta sheets).
  • Tertiary Structure: Overall 3D shape of a single polypeptide chain.
  • Quaternary Structure: Assembly of multiple polypeptide chains.

Properties of Peptide Bonds:

• Peptide Bonds exhibit partial double bond character, allowing for resonance and flexibility in protein structure.
• The configuration of Peptide Bonds can be trans or cis, with trans being more stable due to reduced steric hindrance.

Summary of Methodology:

The presenter outlines the structure of Biomolecules and their components through a tabular format, categorizing polymers, their monomer units, the bonds that hold them together, and the processes involved in bond formation.

Featured Researchers/Sources:

• Komal Sharma (Presenter)

This summary encapsulates the essential concepts discussed in the video regarding Biomolecules, their structure, function, and the scientific principles behind them.