Lab Module 6

Question 1

The tube on the right represents a (BLANK) mL dilution tube.

A) 9
B) 6
C) 10
D) 3

Answer 1

Correct Answer:
A) 9

Question 2

What is the scientific notation being represented?

A) 10
B) 1,000
C) 100
D) 10,000

Answer 2

Correct Answer:
D) 10,000

Question 3

What is the final dilution in this example?

A) 350 CFU/ML
B) .35 CFU/ML
C) 35 CFU/ML
D) 3.5 CFU/ML

Answer 3

Correct Answer:
C) 35 CFU/ML

Question 4

How will these plates be labeled?

A) No need to label these
B) Names of the bacteria being used
C) Petri dish 1, 2, 3 etc…
D) Dilution concentrations

Answer 4

Correct Answer:
D) Dilution concentrations

Question 5

What is the purpose of this step?

A) To separate the water from the microorganisms
B) To mix the dna
C) To achieve a homogeneous suspension
D) To achieve a non-homogeneous suspension

Answer 5

Correct Answer:
C) To achieve a homogeneous suspension

Question 6

What is the name of the instrument being shown by the arrow?

A) Inoculation pipe
B) Pipette
C) Hypernatremia
D) Inoculation loop

Answer 6

Correct Answer:
B) Pipette

Question 7

How much is being measured here from each test tube?

A) 3 ML
B) 1 ML
C) 2 ML
D) 4 ML

Answer 7

Correct Answer:
B) 1 ML

Question 8

What is the purpose of this step?

A) To mix the bacteria with the agar
B) To distribute the inoculum randomly
C) To destroy the bacteria
D) To distribute the inoculum evenly

Answer 8

Correct Answer:
D) To distribute the inoculum evenly

Question 9

For how long are theses plate placed in an incubator?

A) 2 hours
B) 30 minutes
C) Overnight
D) 2 days

Answer 9

Correct Answer:
C) Overnight

Question 10

What is the ultimate reason for serial dilutions?

A) To destroy the majority of microorganisms
B) All of these
C) To add water to a pathogen
D) Ability to count the bacterial colonies

Answer 10

Correct Answer:
D) Ability to count the bacterial colonies

Question 11

What is this ingredient being shown here by the arrow?

A) Jello
B) Agar
C) Carbohydrates
D) Plastic

Answer 11

Correct Answer:
B) Agar

Question 12

How many ml of water are placed in this mixture?

A) 330
B) 33
C) 3330
D) 3300

Answer 12

Correct Answer:
A) 330

Question 13

What is the next step?

A) Pour this mixture into another beaker
B) Place this mixture into a microwave
C) Continue mixing this mixture until it turns red
D) Pour this mixture into a petri dish

Answer 13

Correct Answer:
B) Place this mixture into a microwave

Question 14

Approximately how much time is needed for these to solidify?

A) 2 hours
B) 10 minutes
C) 30 minutes
D) 1 hour

Answer 14

Correct Answer:
D) 1 hour

Question 15

What is occurring during this step?

A) Collecting fingerprints from the door handle
B) Cleaning the door handle
C) Collecting bacteria from the door handle
D) None of these

Answer 15

Correct Answer:
C) Collecting bacteria from the door handle

Question 16

How long do these petri dishes need to stay in this closed box?

A) 4 days
B) 1 day
C) 7 days
D) 14 days

Answer 16

Correct Answer:
C) 7 days

Question 17

From which sample is this?

A) One cannot tell
B) Sink
C) Door knob
D) Refrigerator

Answer 17

Correct Answer:
A) One cannot tell

Question 18

(BLANK) can be used instead of agar to grow bacteria.

A) Phosphorus
B) Salt
C) Gelatin
D) Water

Answer 18

Correct Answer:
C) Gelatin

Question 19

What does this bacterial growth represent?

A) Microwave
B) Dog water
C) Refrigerator
D) Mouth

Answer 19

Correct Answer:
B) Dog water

Question 20

The average bacteria is (BLANK) um in size.

A) 1
B) 2
C) 20
D) 10

Answer 20

Correct Answer:
B) 2