Learning Objectives
5 objectives- Explain the fundamental characteristics and structures of microorganisms and their physiological processes.
- Describe key microbial metabolic pathways and their roles in energy production and growth.
- Analyze bacterial growth dynamics and the environmental factors affecting reproduction.
- Evaluate mechanisms of gene regulation, stress responses, and microbial communication.
- Assess microbial pathogenesis, antimicrobial resistance, and practical applications of microbial physiology.
Content Outline
PreviewUnit 3006: Microbial Physiology
1. Introduction to Microbial Physiology
- Overview of microbial physiology
- Characteristics of microorganisms
- Types: Bacteria, Archaea, Fungi, Protists, Viruses
- Microbial cell structure and function
- Cell wall, membrane, cytoplasm, organelles
- Metabolism fundamentals
- Anabolism and catabolism
- Microbial growth and environmental interactions
- Nutrient uptake, environmental influences
2. Microbial Metabolism
- Overview of metabolic pathways
- Glycolysis (Embden-Meyerhof pathway)
- Steps, key enzymes, ATP yield
- Krebs cycle (Citric Acid Cycle)
- Function and intermediates
- Fermentation pathways
- Types (lactic acid, alcoholic, mixed acid)
- Role in anaerobic conditions
- Anaerobic respiration
- Alternative electron acceptors
- Differences from aerobic respiration
3. Bacterial Growth and Reproduction
- Cell division mechanisms
- Binary fission process
- Growth phases
- Lag, exponential, stationary, death
- Factors affecting growth
- Temperature, pH, nutrient availability, oxygen levels
- Measurement of bacterial growth
- Optical density, viable counts
4. Regulation of Gene Expression in Microorganisms
- Importance of gene regulation
- Transcriptional regulators
- Activators and repressors
- Operon model
- Lac operon, trp operon examples
- Global regulatory networks
- Sigma factors, two-component systems
- Post-transcriptional regulation overview
5. Microbial Adaptation and Stress Responses
- Types of environmental stresses
- Nutrient limitation, temperature shifts, osmotic stress, antibiotics
- Mechanisms of adaptation
- Stringent response
- Heat shock proteins
- Osmoprotectants
- Stress response pathways
- General stress response
- DNA repair systems
6. Microbial Interactions and Communication
- Microbial communities and ecology
- Quorum sensing
- Signal molecules and regulatory effects
- Biofilm formation
- Stages, significance, and resistance
- Symbiotic relationships
- Mutualism, commensalism, parasitism
7. Microbial Pathogenesis
- Definition and overview
- Mechanisms of pathogenicity
- Adhesion to host cells
- Invasion strategies
- Toxin production
- Immune evasion mechanisms
- Host-pathogen interactions
8. Antimicrobial Resistance
- Overview of antimicrobial resistance
- Mechanisms of resistance
- Acquisition of resistance genes (horizontal gene transfer)
- Efflux pumps
- Target site modification
- Biofilm-mediated resistance
- Clinical and environmental implications
9. Applications of Microbial Physiology
- Biotechnology applications
- Antibiotic production
- Industrial fermentation
- Environmental applications
- Bioremediation
- Medical applications
- Vaccine development
- Probiotics
- Emerging technologies
- Synthetic biology
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