1st Week_a15e0ce8de4dd124bfb97d6b848b9c52
Page 1
Instructor: Assistant Professor
Page 2: Biochemistry Introduction
Biochemistry: Derived from the Greek word "bios" meaning "living".
It studies the structure, formation, function, and chemical events in living organisms at the biomolecular level.
Sub-disciplines include:
Structural Biology: Focuses on molecular structures.
Enzymology: Studies enzymes and their functions.
Metabolism: Examines metabolic pathways and energy transformations.
Emphasizes chemical basis of biological processes within cells and their relation to tissues and organ functions.
Page 3: Importance of Carbon Compounds in Living Organisms
Carbon Compounds: Essential organic compounds mainly in the reduced state.
Bioorganic compounds consist of Carbon (C), Hydrogen (H), Nitrogen (N), and Oxygen (O).
These elements account for 99% of cellular weight, along with trace elements like Na, K, Cl, and others.
Page 4: Characteristics of Living Organisms
Living Organism Definition: Beings composed of simple structural molecules/complex organ systems.
Characteristics include:
Organization: Complex structures.
Function: Specific roles for each component like lipids and proteins.
Energy Transfer: Transforming environmental energy into usable forms.
Replication: Ability to reproduce, indicating life.
Page 5: Principal Areas of Biochemistry
Key Areas:
Structural Chemistry
Metabolism
Molecular Genetics
Page 6: Structure and Activity of Biological Macromolecules
Focuses on biological macromolecules: proteins, nucleic acids, carbohydrates, lipids.
Food Categories:
Macromolecules: Proteins, lipids, carbohydrates.
Pathways: Catabolic (energy release) and anabolic (energy consumption).
Page 7: Metabolism Overview
Main Functions:
Convert food energy for cellular processes.
Build blocks for biological molecules.
Eliminate wastes.
Categories of Metabolism:
Catabolic: Breakdown of compounds.
Anabolic: Building up compounds.
Energy dynamics of metabolism explained.
Page 8: Molecule Classes in Living Organisms
Basic molecules: Amino acids, carbohydrates, nucleic acids, lipids.
Metabolic processes: Construct or deconstruct these vital molecules.
Biochemistry Relation: Closely linked to molecular biology.
Page 9: Purpose of Biochemistry
Investigates chemical organization within cells and the reactions that maintain harmony in cellular processes.
Aims for understanding mechanisms of diseases related to metabolic disruptions.
Page 10: Key Terminology in Biochemistry
Biochemistry: Branch of science studying biomolecules.
Biomolecule: Groups of molecules making up living structures and functions.
Page 11: Understanding Cells and Nucleic Acids
Cell: Smallest unit of life.
DNA (Deoxyribose Nucleic Acid): Carries genetic instructions.
RNA (Ribonucleic Acid): Involved in protein synthesis.
ATP (Adenosine Triphosphate): Key energy transporter within cells.
Page 12: Key Biomolecules and Their Functions
Glucose: Primary energy source, involved in metabolic pathways.
Carbohydrates: Composed of C, H, O.
Lipids: Provide structure and energy.
Proteins: Made from amino acids, serve structural and energy roles.
Enzymes: Biological catalysts enhancing reactions.
Hormones: Facilitate communication in biological systems.
Page 13: Metabolic Terms and Processes
Metabolism: Interaction between cells and their environment involving enzymatic processes.
Metabolite: Compounds participating in metabolic processes.
Anabolism & Catabolism: Definitions of building and breaking down substances.
Page 14: Building Blocks of Living Cells
Organic Substances:
Carbohydrates, proteins, enzymes, lipids, nucleotides.
Inorganic Substances: Minerals and water.
Macromolecules comprise a significant part of cell mass.
Page 15: Dentin Composition in Teeth
Dentin: Flexible tissue with significant inorganic and organic components, essential for dental structure.
Composition breakdown includes: minerals, proteins, and collagen fibers.
Page 16: Blood pH and Homeostasis
pH: Indicator of acidity/alkalinity in biological systems (7.4 normal).
Conditions explained: Acidosis and alkalosis as pH deviations.
Buffer Systems: Mechanisms that maintain pH stability in human body.
Page 17: Interpretation of pKa and Buffers
pKa: related to acid/base protonation states.
Buffer Systems: Consist of weak acids and their conjugate bases.
Page 18: Importance of Buffers
Buffers maintain stable environments for biological function.
Key implementations in blood and intracellular systems.
Page 19: Salivary Buffering
Saliva pH during normal conditions and the role of bicarbonate and buffering during acidity.
Page 20: Body Fluids and Their Functions
Over two-thirds of the body is fluid, primarily water.
Various types of body fluids listed, e.g., tears, saliva, urine.
Page 21: Composition of Body Fluids
Key organic substances include glucose, fatty acids, enzymes; and important inorganic substances like sodium, potassium.
Page 22: Dental Biochemistry Considerations
Importance of various biochemical processes and their effect on oral health.
Characteristics of tooth enamel, dentin, pulp, and gum tissue.
Page 23: Whole Mouth Fluid Dynamics
Saliva volume and composition detailed - diagnostic relevance in health.
Page 24: Salivary Gland Structure and Function
Description of salivary glands emphasizing role in digestion and protection.
Page 25: Impacts of Body Fluid Diseases on Oral Health
Overview of disorders associated with saliva and their symptoms in oral health.
Page 26: Water Metabolism Overview
Exogenous Water: Primarily from dietary sources; Endogenous Water: Produced internally from metabolic processes.
Page 27: Biological Functions of Water
Key roles outlined: temperature regulation, cleansing, transporting nutrients, and enabling enzymatic activities.
Page 28: Body Water Content Changes
Body water percentage varies with age, organ, and tissue type.
Page 29: Water Content in Different Tissues
Detailed water composition in various body tissues.
Page 30: Liquid Density and Types
Definitions and implications of isotonic, hypertonic, and hypotonic fluids reviewed.
Page 31: Common Water Metabolism Diseases
Overview of conditions related to water metabolism abnormalities.
Page 32: Main Functions of Blood
Blood functions include transport, osmotic regulation, detoxification, and temperature control.
Page 33: Blood Composition
Overview of the components of blood: plasma and formed elements.
Page 34: Red Blood Cells
Function, lifespan, and importance of red blood cells explained.
Page 35: White Blood Cells
Defense functions and classifications of white blood cells discussed.
Page 36: Blood Platelets
Characteristics and roles of platelets in clotting and wound repair.
Page 37: Serum vs Plasma
Differences between serum and plasma outlined, including methods of separation.
Page 38: Obtaining Plasma from Whole Blood
Process of obtaining plasma through anticoagulation.
Page 39: Comparison of Serum and Plasma
Detailed comparison highlighting major differences and clinical uses.
Page 40: Blood Diseases Relevant to Dentistry
Discussion on the significance of blood disorders in dental practice.
Page 41: Causes of Bleeding Gums
A list of potential causes including dental hygiene practices and medical conditions.