identifying structure

Question 1

what structural features are used to identify different type of microorganisms

Answer 1

shape, size, arrangement, cell wall(gram +ve/-ve), structures(flagella, spores etc.)

Question 2

give some common shapes of bacteria

Answer 2

cocci(spheres)
bacilli(rods)
spiral

Question 3

describe how cocci bacteria divide and form colonies

Answer 3

they can divide in 1 plane to produce chains of 4-20 molecules
OR divide in 3 planes to produce clumps

Question 4

describe how bacilli bacteria form colonies

Answer 4

they form chains, can also have curved rods called vibrio(gram -ve)

Question 5

describe the different structures of spiral bacterium

Answer 5

they can form rigid or flexible spirals

Question 6

what different structures can be used to identify microorganisms

Answer 6

flagella, pili, spores, capsules

Question 7

describe what a spore is

Answer 7

an inert structure that is resistant to chemical ad physical challenge

Question 8

bacteria can also be classified by their ability to use/tolerate oxygen, give the different classifications

Answer 8

aerobic = grow in oxygen/air
obligate aerobes = require oxygen
obligate anaerobes = killed by oxygen
facultative anaerobes = tolerate oxygen