MBY 251 Lecture 2 Exam
Latest Update
Capsules & Slime layers - Answer =polysaccharides
These polysaccharides assist in attachment to solid surfaces
-development and maintenance of biofilms
- Act as virulence factors in certain diseases
- Protects cells from phagocytic cells
- role in providing resistance to desiccation
- Food reserves
Capsule - Answer =tightly packed matrix
=exclude small particles (india ink)
=firmly attached to cell walls
some covalently bound to peptidoglycan
Slime layer - Answer =loosely packed matrix
=more difficult to see
=loosely attached>can be lost
Fimbriae & Pilli - Answer =filamentous protein structures
Fimbriae - Answer *attachment> stick to surfaces/form pellicles
*common in pathogens
>Salmonella
>Neisseria gonorrhoea
>Bordetella pertussis
Pilli - Answer *longer than fimbriae
*few per cell
Latest Update
Capsules & Slime layers - Answer =polysaccharides
These polysaccharides assist in attachment to solid surfaces
-development and maintenance of biofilms
- Act as virulence factors in certain diseases
- Protects cells from phagocytic cells
- role in providing resistance to desiccation
- Food reserves
Capsule - Answer =tightly packed matrix
=exclude small particles (india ink)
=firmly attached to cell walls
some covalently bound to peptidoglycan
Slime layer - Answer =loosely packed matrix
=more difficult to see
=loosely attached>can be lost
Fimbriae & Pilli - Answer =filamentous protein structures
Fimbriae - Answer *attachment> stick to surfaces/form pellicles
*common in pathogens
>Salmonella
>Neisseria gonorrhoea
>Bordetella pertussis
Pilli - Answer *longer than fimbriae
*few per cell
