Bacteria Oxygen and Temperature Requirements

Question 1

Obligate Aerobe and example

Answer 1

Bacteria that requires oxygen to live and survive. It must have it or it’ll die!

-Bacillus subtilis

Question 2

Obligate Anaerobe and example

Answer 2

Bacteria that are killed by oxygen.

-Clostridium botulinum

Question 3

Aerotolerant Anaerobe and example

Answer 3

Bacteria that don’t need oxygen, but won’t affect them if present.

-Lactobacillus casei

Question 4

Facultative Anaerobe and example

Answer 4

Bacteria that can use oxygen, but can continue to grow without it.

-Escherichia

Question 5

Microqerophile

Answer 5

Bacteria that can only use 2-10% of oxygen at lower levels and require it!

-Helicobager pylori

Question 6

4H2O

Answer 6

Water

Question 7

O2- is this deadly?

Answer 7

Superoxide anion YES!!!!!

Question 8

H2O2 is this deadly?

Answer 8

Hydrogen Peroxide YES!!!!!!

Question 9

What enzyme is used to defend against Superoxide anion?

Answer 9

Superoxide dismutase

Question 10

What enzyme is used to defend against Hydrogen Peroxide?

Answer 10

Catalase

Question 11

Why are Obligate Anaerobes sensitive to oxygen?

Answer 11

They don’t have the enzyme to break down the molecule!!

Question 12

Describe Mesophiles. What temp is the range for the bacteria? Name an example.

Answer 12

1. Middle-loving
2. 15-40oC
3. E. coli

Question 13

Describe Psychrophiles. What temp is the range for the bacteria? Name an example.

Answer 13

1. Cold-loving
2. below 15oC
3. Chryseo greenlandensis

Question 14

Describe Psychrotrophs. What temp is the range for the bacteria? Name an example.

Answer 14

1. Cold-tolerant
2. 15-40oC
3. Listeria mono

Question 15

Describe Thermophiles. What temp is the range for the bacteria? Name an example.

Answer 15

1. Heat-loving
2. 50-80oC
3. Thermus aquaticus

Question 16

Describe Hyperthermophiles. What temp is the range for the bacteria? Name an example.

Answer 16

1. Extreme heat-loving
2. above 80oC
3. Strainizi