Bio 103 Ch 25 Bacteria and Archaea
How does penicillin work?
by dominating cell walls thus killing bacteria
bacteria may reproduce by
Binary fusion; a sexually.
The bacterium that causes botulism disease is harmless until it?
Germinates
Name the three shapes of bacteria
Round (coccus), rod-shaped (bacillus), spiral (spirochete)
What is peptidoglycan?
a network of sugar polymers cross-linked by polypeptides
Mad cow disease is caused by
prions
Most bacterial cells keep from bursting in a hypotonic envirment by?
A ridged cell wall
A chain of round bacteria would be called?
cocci
What shape is vibrio?
comma shaped
Bacteria can reproduce asexually and sexually. Name the six ways bacteria can reproduce.
Asexual: Binary Fission, Budding, Fragmentation Sexual: Transformation, Transduction, Conjugation
Within Bacteria, small circles of DNA called ______________ exist in addition to the bacterial chromosome.
Plasmid
Gram-positive bacteria would stain ____ in a gram stain because of the thick layer of _________ in their cell walls.
Purple, Peptidoglycan
Some bacteria avoid being phagocytized by its host's immune system by means of a ?
capsule