This document summarizes the structure, classification, and growth of bacteria. It discusses the genetic material, cell wall composition, flagella, pili, and shapes of bacteria. It also addresses how bacteria are classified based on cell wall antigens, biochemical properties, toxins, antibiotic and phage susceptibility, and genetics. Bacterial growth and division are described, including replication start sites, speed, ensuring accuracy, cell division preceded by replication, and cellular arrangements.

1. “ Bacterium ( Structure,
Division, & Classification)”
Muhammed Al Bashir
MBBS student
at Sulaiman AlRajhiUniversity
@M7mdAlBashir

2.  Structure
• Genetic information
• Sequence of genes
• Chromosome location &
why?
• Extrachromosomal GI
(plasmids)
• Cytoplasm contents
• Ribosomes
• Targets
• Metabolic functions
• Mycoplasmas ( cell wall )
• What is present external to
this wall?

3. • Cell Wall
• main component
• Gram +, & -
• polysaccharides and charg
ed amino acids in the
peptidoglycan
• Why gram-positive resist
the activity of bile in the
intestine? & what digest it
?
• Synthesis of peptidoglycan
is disrupted by what?
• Entry of hydrophilic
molecules ( why not easy
through gram + & - & how
it is done ? )
• Discrimination of the
Gram-positive ? By the
outer & inner membrane
• The capsule composition &
function

4. • The shapes

5. • Flagella
• Define
• Locations
• Source of
energy
• Chemotaxis
• Composition
& antibodies

6. • Pili
• Deference
between it
& the
flagella in
composition
& function
• Types of
attachment

7. Classification
• What is used for classification?

8.  Correct Identification
• The importance of classification
• Cell wall, flagellar and capsule antigens
• Biochemical
• Toxins & antibiotics susceptibility
• Bacteriophage viruses susceptibility
• Phage typing
• genetic approaches

9. Growth and Division
• Depends on what ? &
examples
• Characteristic pattern
• Replication start site
and the process
• Replication speed
• Accurate replication
• Cell division is
preceded by what?
• Cellular arrangements
• Targets

10. @M7mdAlBashir
ThanQAny ?