Structure of bacterial cell

FOR UG STUDENTS

1. STRUCTURE OF BACTERIA
Dr. V. RAMESH
Assistant Professor & Head In-Charge,
Department of Botany,
Vivekananda College,
Tiruvedakam West –625 234
Madurai

2. BACTERIA
Discovered by Antony van Leuwenhoek
Coined by Ehrenberg

3. Size varies from 0.5 µ –3 µ
Smallest Pelagibacter ubique (length of 0.37–0.89µm) Largest is
Thiomargarita namibiensis 0.1–0.3mm (100–300μm)
Primitive
Incipient Nucleus Present
Plasmid present
Cell wall –Peptidoglycon
Categories -Bacteria, Cyannobacteria (BGA), Archebacteria
Absorptive mode of Nutritoin
Reproduction is Binary fission
70 S Ribosomes
Locomotion by Flagella
GENERAL CHARACTICS

5. Structure of Bacterial Cell

6. COMPONENTS OF BACTERIA

7. COMPONENTS OF BACTERIA
External to the cell wallInternal to the cell wall
Flagella
Pilli or Fimbriae
Capsule
Plasma memrane
Mesosomes
Ribosomes
Chromosome
Plasmids
Inclusions
Vacuoles
Capsule
Cell wall
Plasma Membrane

8. Capsule or glycocalyx
Function

9. CELL WALL

10. FUNCTION OF CELL WALL

11. PLASMA MEMBRANE
Function

12. MESOSOME

14. NUCLEOID OR BACTERIAL CHROMOSOME

15. PLASMIDS
Functions
Antibiotic resistance
Resistance to heavy metals
Resistance to UV Light
Ability of adherence of epithelial cells

17. FLAGELLA
Types
Atrichous –Absence of Flagellum
Function -Locomotion

19. PILI or FIMBRIAE
Types
Function