Lecture test 2

Question 1

Obligate aerobes

Answer 1

Require oxygen to exist. Without it they are dead

Question 2

Strict Anaerobes

Answer 2

Killed by oxygen

Question 3

Facultative Aerobes/Anaerobes

Answer 3

can live with or without oxygen but prefer oxygen being present

Question 4

Aerotolerant

Answer 4

Can tolerate oxygen though they have no use for it

Question 5

Microaerophiles

Answer 5

can use oxygen when present in levels reduced from that in air.

Question 6

Is the Ribosome membrane bound

Answer 6

No it is not.

Question 7

What is Simple transport driven by

Answer 7

It is driven by a proton motive force

Question 8

What drives Group transport

Answer 8

Driven by a Phosphoenolpyruvate

Question 9

What drives ABC transport

Answer 9

Driven by a periplasmic binding protein and is also ATP driven.

Question 10

When the flagella is at both ends

Answer 10

Amphitrichous

Question 11

Lophotrichous

Answer 11

Flagella located in a tuft at one end

Question 12

Peritrichous

Answer 12

Flagella distributed around the cell.

Question 13

Defined Medium

Answer 13

chemical composition is known

Question 14

Minimal Medium

Answer 14

Defined medium which provides the minimum nutritional requirement for growth.

Question 15

k=(log Nt - log No)/0.301∆t

Answer 15

log exponential growth for bacteria

Question 16

Complex Medium

Answer 16

Exact chemical composition needed is unknown so meat or yeast extract is supplied to give variety of growth factors.

Question 17

Aerotolerant microbes have what enzymes

Answer 17

Superoxide dismutase and Peroxidase

Question 18

What are the different enzymes made to combat the harmful effects of oxygen

Answer 18

Catalase, Peroxidase, Superoxide dismutase, Superoxide Reductase.