XL - S Microbiology
Section 1: Historical Perspective
Discovery of microbial world; Landmark discoveries relevant to the field of
microbiology; Controversy over spontaneous generation; Role of microorganisms in
transformation of organic matter and in the causation of diseases.
Section 2: Methods in Microbiology
Pure culture techniques; Theory and practice of sterilization; Principles of microbial
nutrition; Enrichment culture techniques for isolation of microorganisms; Light-,
phase contrast- and electron-microscopy.
Section 3: Microbial Taxonomy and Diversity
Bacteria, Archea and their broad classification; Eukaryotic microbes: Yeasts, molds
and protozoa; Viruses and their classification; Molecular approaches to microbial
taxonomy.
Section 4: Prokaryotic and Eukaryotic Cells: Structure and Function
Prokaryotic Cells: cell walls, cell membranes, mechanisms of solute transport across
membranes, Flagella and Pili, Capsules, Cell inclusions like endospores and gas
vesicles; Eukaryotic cell organelles: Endoplasmic reticulum, Golgi apparatus,
mitochondria and chloroplasts.
Section 5: Microbial Growth
Definition of growth; Growth curve; Mathematical expression of exponential growth
phase; Measurement of growth and growth yields; Synchronous growth; Continuous
culture; Effect of environmental factors on growth.
Section 6: Control of Micro-organisms
Effect of physical and chemical agents; Evaluation of effectiveness of antimicrobial
agents.
Section 7: Microbial Metabolism
Energetics: redox reactions and electron carriers; An overview of metabolism;
Glycolysis; Pentose-phosphate pathway; Entner-Doudoroff pathway; Glyoxalate
pathway; The citric acid cycle; Fermentation; Aerobic and anaerobic respiration;
Chemolithotrophy; Photosynthesis; Calvin cycle; Biosynthetic pathway for fatty
acids synthesis; Common regulatory mechanisms in synthesis of amino acids;
Regulation of major metabolic pathways.
Section 8: Microbial Diseases and Host Pathogen Interaction
Normal microbiota; Classification of infectious diseases; Reservoirs of infection;
Nosocomial infection; Emerging infectious diseases; Mechanism of microbial
pathogenicity; Nonspecific defense of host; Antigens and antibodies; Humoral and
cell mediated immunity; Vaccines; Immune deficiency; Human diseases caused by
viruses, bacteria, and pathogenic fungi.
Chemotherapy/Antibiotics
General characteristics of antimicrobial drugs; Antibiotics: Classification, mode of
action and resistance; Antifungal and antiviral drugs.
Section 9: Microbial Genetics
Types of mutation; UV and chemical mutagens; Selection of mutants; Ames test for
mutagenesis; Bacterial genetic system: transformation, conjugation, transduction,
recombination, plasmids, transposons; DNA repair; Regulation of gene expression:
repression and induction; Operon model; Bacterial genome with special reference
to E.coli; Phage λ and its life cycle; RNA phages; RNA viruses; Retroviruses; Basic
concept of microbial genomics.
Section 10: Microbial Ecology
Microbial interactions; Carbon, sulphur and nitrogen cycles; Soil microorganisms
associated with vascular plants.
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