Lec 3&4 Flashcards
Rigid layer responsible for the strength of the wall.
Peptidoglycan
Peptidoglycan can be destroyed by certain agents like?
1.Penicillin 2.Lysozyme
destroys preexisting peptidoglycan
Lysozyme
prevents its biosynthesis, leading to a weakened molecule and osmotic lysis.
Penicillin
channels for movement of hydrophilic low-molecular-weight substances
Porins
filamentous proteins, enable cells to stick to surfaces or form pellicle
Fimbriae
Example of Bacteria that buoyancy in planktonic cells and they have Conical-shaped
cyanobacteria
Gas vesicles protein function?
decreasing cell density
.
Measured by inserting a capillary tube containing an attractant or a repellent in a medium of motile bacteria.
This is measuring of ?
Measuring Chemotaxis
is analogous to chemotaxis except that the attractant in this case is light instead of a chemical.
Phototaxis
movement toward or away from oxygen
Aerotaxis
movement toward or away from conditions of high ionic strength
Osmotaxis
movement toward water (allows gliding cyanobacteria that inhabit dry environments, such as desert soils, to glide toward a gradient of increasing hydration.
Hydrotaxis
directed movement in response to chemical or physical gradients.
Taxis
thin protein covering
exosporium
