BACTERIA CH 4 Flashcards
Identify the structures common to all bacterial cells
Cell Membrane
Ribosomes
Cytoplasm
DNA (in the nucleoid region)
Identify the structures present in some bacteria
Cell Wall
Capsule
Pilus
Plasmid
Fimbriae
Flagella
CC, PP, FF
Identify the following structures and select which are present in all bacterial cells
A - Fimbriae
B - Cytoplasm*
C - DNA in Nucleoid*
D - Plasmid
E - Ribosomes*
F - Flagella
G - Pilus
H - Capsule
I - Cell Wall
J - Cell Membrane*
*Present in all Bacterial Cells
Identify and describe the general shapes of bacteria
Coccus - Circles
Bacillus - Rods
Vibrio - Any curve
Describe the general arrangements of cocci
Describe the general arrangements of bacilli
T/F Bacterial Fimbriae are used for conjugation
False; they are used to attach or hold onto things
Pili are used for conjugation
Capsules vs Biofilm
Capsules surround a single cell and is used as protection against phagocytosis
Biofilm surrounds entire cell communities
Function of Flagella
Long tail-like appendages that allow for true motility, and in some cases, attatchment
Function of Axial Fillaments
Inching Motion
Function of Fimbriae
Attatchment + Holding onto other cells (strep throat remaining in our pharynx)
Function of Pili
Attatchment from one bacteria to another; allows for the exchange of DNA from the plasmid
“bacterial sex”
Identify and describe the two types of chemotaxis
Positive Chemotaxis - Movement toward a favorable chemical stimulus
Negative Chemotaxis - Movement away from a potentially harmful chemical stimulus
You successfully complete a gram stain and all of your bacteria are pink. What does this tell about the structure of the bacterial species
GRAM-
Outer Membrane
Thin Peptidoglycan Layer (Cell Wall)
Inner Membrane
Describe Gram- Bacteria
Pink
Outer Membrane
Thin Peptidoglycan Layer (Cell Wall)
Inner Membrane