3.5

Question 1

All bacterial cell walls have a layer of _____________

Answer 1

peptidoglycan

Question 2

Bacteria have a slime layer which may be formed from starch, gelatin, protein or glycolipid, this layer is called a _________

Answer 2

capsule

Question 3

How can some bacteria move themselves?

Answer 3

using a flagellum

Question 4

What are pili?

Answer 4

a thread-like protein projections found on the surface of some bacteria. Used for reproduction and attachment to host cell

Question 5

In some bacterial cells the membrane shows infoldings which are known as _________

Answer 5

mesosomes

Question 6

What is the name of the area found in the bacterial cell where the DNA is found?

Answer 6

nucleoid

Question 7

What is the function of plasmids?

Answer 7

to code for a particular aspect of the bacterial phenotype in addition to the genetic information in the nucleoid e.g plasmids code for the production of a particular toxin

Question 8

what does gram staining help with?

Answer 8

gram staining helps to distinguish between two types of cell walls in bacteria, gram positive and gram negative.

Question 9

name a spherical bacteria, a rod-shaped bacteria, a twisted bacteria and a comma shaped bacteria.

Answer 9

cocci, bacilli, spirilla, vibrios.

Question 10

whats the name of an organism that needs oxygen for respiration

Answer 10

obligate aerobes

Question 11

name the organism that can use oxygen if its available but can respire and survive without it

Answer 11

facultative anaerobes.

Question 12

name the organism that can only resprire in the absence of oxygen and are killed by oxygen

Answer 12

obligate anaerobes