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Question 1

1. Stages of Bacterial Growth

Adjustment phase

Answer 1

LAG PHASE

Question 2

1. Stages of Bacterial Growth

stage where the bacterial cells divide at a constant rate; stage where the organisms are most active metabolically; stage where the organisms are most susceptible to antibiotics

Answer 2

LOG PHASE/EXPONENTIAL PHASE

Question 3

1. Stages of Bacterial Growth

stage where the number of dying organisms is equal to the number of viable organisms

Answer 3

STATIONARY PHASE

Question 4

1. Stages of Bacterial Growth

stage where the number of dying organisms is greater than the number of viable organisms

Answer 4

DEATH/DECLINE PHASE

Question 5

2. Nutritional requirements of Bacteria

O2= 21%
CO2= 0.03%

Answer 5

Obligate aerobes

Question 6

2. Nutritional requirements of Bacteria

O2= 15%
CO2= 5-10%

Answer 6

Capnophiles

Question 7

2. Nutritional requirements of Bacteria

O2= 5%
CO2= 10%
Nitrogen= 85%

Answer 7

Microaerophiles

Question 8

Ex of Obligate Aerobes (1)

Answer 8

Micrococcus

Question 9

Ex of Capnophiles (2)

Answer 9

Neisseria
Haemophilus

Question 10

Ex of Microaerophiles (2)

Answer 10

Campylobacter
Helicobacter

Question 11

Ex of Facultative Anaerobes (1)

Answer 11

Staphylococcus

Question 12

2. Nutritional requirements of Bacteria

an anaerobic system of incubation that is an evacuation-replacement system

Answer 12

Anaerobic jar

Question 13

2. Nutritional requirements of Bacteria

an anaerobic system of incubation which is a disposable anaerobic bag

Answer 13

Glove-box mtd

Question 14

2. Nutritional requirements of Bacteria

an anaerobic system of incubation which are known as Torbal Jar and Gas Pak Jar

Answer 14

Brewer jar

Question 15

T/F

Candle jar is an anaerobic jar

Answer 15

F

Candle jar is NOT an anaerobic jar!!

Question 16

2. Nutritional requirements of Bacteria

Characteristics of Anaerobic Incubation

• Palladium pellets are used as _
• Indicator of effectiveness of anaerobic system:_

Answer 16

catalysts

METHYLENE BLUE
note:
presence of O2 = MB is blue
absence of O2 = MB is colorless

Question 17

2. Nutritional requirements of Bacteria

Carbon source is from carbon dioxide and other inorganic substances =

Answer 17

AUTOTROPHS/ LITOTROPHS

Question 18

2. Nutritional requirements of Bacteria

Carben source is from organic compounds like carbohydrates, lipids and proteins =

Answer 18

HETEROTROPHS/ ORGANOTROPHS

Question 19

Organism that grows both at 35°C and 42°C =

Answer 19

Pseudomonas aeruginosa
Campylobacter

Question 20

Psychropilic organisms (cold-loving)

Answer 20

Y. enterocolitica
Listeria monocytogenes