microbio basic bacteriology5

Question 1

What does the bacterial ribosome do and what is it composed of?

Answer 1

Protein synthesis; composed of 50S and 30S subunits

Question 2

What is the “periplasm”?

Answer 2

Space between the cytoplasmic membrane and the outer membrane in gram negs

Question 3

What does the periplasma contain that is important?

Answer 3

Many hydrolytic enzymes, incl beta lactamases

Question 4

What is the pilus/fimbria (esp sex pilus) and what is it made of?

Answer 4

It mediates adherence between the bacteria and the cell surface; sex pilus forms attachemnet between 2 bacteria during conjugation; made of glycoprotein

Question 5

What does the flagellum do?

Answer 5

motilty; made of protein

Question 6

What is the function and composition of a bacterial capsule?

Answer 6

Function is to protect against phagocytosis; Composition is an organized, discrete polysaccharide layer

Question 7

What is a glycocalyx?

Answer 7

Mediates adherence to surfaces, especially foreign surfaces like indwelling catheters