BCM INTRODUCTION

Definition: Biochemistry is an integration of biology and chemistry that studies life processes at the molecular level.
Historical Context: Originally called "Physiological Chemistry"; focuses on the role of atoms and molecules in biological structures and processes.

Study of Life: Examines life from an atomic and molecular perspective, extending beyond classical biology.
Influence of Advancements: Rapid developments in biochemistry provide scientific explanations for previously morphological phenomena.

Cell as a Dynamic System: Cells are viewed as biochemical systems where structure and function are interconnected.
Macro and Supramolecular Complexes: Understanding structural organization is crucial as they exhibit unique properties and functions compared to their individual components.
Example - Hemoglobin: Hemoglobin's ability to change form for oxygen transport showcases the novel properties of biological macromolecules.

Focuses on common characteristics across all life forms.
Identifies universal chemical systems critical to all cells:
- Synthesis System: Produces compounds for cell reproduction.
- Membrane System: Isolates cell contents, creating compartmentalization.
- Energy Supply System: Provides energy for cellular functions.

Biochemistry is foundational across various biological fields, essential for advanced understanding in medicine, agriculture, etc.
Educational Relevance: Integral part of biology and medical education; enhances understanding of cell ultrastructures and functions.

Three Branches:
- Static Biochemistry: Chemical composition of living systems (qualitative and quantitative).
- Dynamic Biochemistry: Chemical processes and energy transformations in life systems, known as metabolism.
- Functional Biochemistry: Links metabolic processes with the functions of cellular components.

General Biochemistry: Common structures and transformations in living systems.
Bioorganic Chemistry: Physico-chemical functioning of cellular systems.
Bioinorganic Chemistry: Interaction of inorganic ions and organic molecules.
Animal/Plant Biochemistry: Chemical composition and energy transformations in respective organisms.
Medical/Veterinary Biochemistry: Focus on human and animal health, pathology and chemical transformation.
Industrial Biochemistry: Studies food product chemistry and industrial applications.
Evolution Biochemistry: Compares biochemical pathways across species.
Radiation Biochemistry: Impact of ionizing radiation on living systems.
Quantum Biochemistry: Properties and functions of bioorganic compounds based on quantum calculations.
Cosmic Biochemistry: Biochemical issues from human activities in space.

Studies the interaction of molecules within living systems.
Emphasizes the control of biological processes and advances like genetic engineering and biochemical systematics.

Originated over 250 years ago, hindered by the slow development of organic and analytical chemistry.
Key Contributors:
- Carl Sheele: Isolated compounds; defined early ideas in biochemistry.
- Friedrich Wohler: Synthesized urea, challenging vitalism.
- Emil Fischer: Advanced knowledge in structural biochemistry, focusing on molecules like carbohydrates and amino acids.
Conceptual Shifts: From vitalism to modern biochemistry; understanding metabolic aspects in respiration and fermentation.
20th Century Advances: Characterization of vitamins, the role of enzymes in catalysis, and elucidation of DNA structure led to the emergence of molecular biology.