chapter 4

Front

glycocolyx helps bacteria

Back

stick to surfaces

Front

outer part of bact cell wall contain

Back

glycocoalyx

Front

2 types of glycocoalyx

Back

slime layer- thin

capsul- thick

Front

appendages of bacteria

Back

• flagella= tail like structure = helps bacteria move

• fimbrae/pilli= hair like projections help bacteria stick

• Axial filaments= allow bacteria to go thru thick environments (mucus,etc)

Front

cell walls of bacteria composed of

Back

peptidoglycan

Front

what forms cell walls with help of peptidoglycan

Back

crosslinks of peptidoglycan

Front

2 different types of bacteria are

Back

gram positive and gram negative

Front

what is gram positive

Back

• thicker layer of PG cell wall,

• thin periplasmic space,

• teichonic/lipoteichoic acids keep bact strong,

• protoplast= cell wall removed

Front

peptidoglycan is thicker on

Back

gram pos bact.

Front

gram negative

Back

• thinner PG walls,

• extra outer lipid membrane,

• extensive periplasmic space,

• contains lipopolysa ccharide= lipid A (cause strong immune reactions called endotoxin),

• porins= tiny channels in the outer membrane that allow molecules to pass through

• spheroplasts= wall removed