Question 1

A common type of autoinducer found in gram-negative bacteria are acyl homoserine lactones (AHL).

Accepted Answer

A) True 
 B)False

Question 2

A given medium can be either selective or differential but not both.

Accepted Answer

A) True 
 B)False  False

Question 3

You would like to culture a bacterium that is growing in the lung of a human patient with pneumonia.Which media would be of most use in culturing this organism?

Accepted Answer

A)  Transport media.
B)  Mannitol salt agar.
C)  MacConkey's agar.
D)  Complex medium supplemented with whole blood.
E)  None of the choices.F) B) and C)
G) A) and C) D

Question 4

A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called __________ culture system.

Accepted Answer

A)  continuous
B)  batch
C)  fed-batch
D)  semicontinuousASME) B) and D)
F) None of the above

Question 5

The purpose of the penicillin binding proteins is to link phospholipids together in the cellular membrane.

Accepted Answer

A) True 
 B)False

Question 6

A microbial environment containing high nutrient concentrations is called an oligotrophic environment.

Accepted Answer

A) True 
 B)False  False

Question 7

Membranes of some thermophilic Archaea are stabilized by ether linked phospholipids.

Accepted Answer

A) True 
 B)False

Question 8

Organisms that require increased pressure for optimum growth are called

Accepted Answer

A)  barotolerant.
B)  osmotolerant.
C)  barophilic.
D)  osmophilic.E) All of the above
F) A) and C)

Question 9

Organisms that grow well at 0 °\degree° C and have optimum growth temperatures of 15 °\degree° C or lower are called

Accepted Answer

A)  psychrotrophs.
B)  psychrophiles.
C)  frigiphiles.
D)  mesophiles. E) A) and B)
F) All of the above

Question 10

Organisms that grow near deep-sea volcanic vents are likely to be

Accepted Answer

A)  alkylophilic.
B)  acidophilic.
C)  barophilic or barotolerant.
D)  picrophilic.ASME) None of the above
F) A) and D)

Question 11

Organisms that ignore oxygen and grow equally well in its presence or absence are called

Accepted Answer

A)  facultative anaerobes.
B)  microaerophiles.
C)  aerotolerant.
D)  anoxygenic.E) None of the above
F) B) and D)

Question 12

When a young,vigorously growing culture of bacteria is transferred to fresh medium of the same composition,the lag phase is usually short or absent.

Accepted Answer

A) True 
 B)False

Question 13

Blood agar is both a differential and enriched medium.

Accepted Answer

A) True 
 B)False

Question 14

When a microorganism is placed in a(n) __________ solution,water will enter into the cell and cause it to burst unless something is done to prevent this.

Accepted Answer

A)  hypotonic
B)  isotonic
C)  hypertonic
D)  osmotonicE) B) and D)
F) B) and C)

Question 15

Organisms that have their optimum growth pH between 5.5 and 8.0 are called __________.
ASM

Accepted Answer

The answer of Organisms that have their optimum growth pH...

Question 16

Organisms that are not drastically affected by increased pressure are called

Accepted Answer

A)  barotolerant.
B)  osmotolerant.
C)  barophilic.
D)  osmophilic.E) A) and B)
F) B) and C)

Question 17

The total number of viable microorganisms remains constant in stationary phase because

Accepted Answer

A)  there is a balance between cell division and cell death.
B)  there is a cessation of cell division even though the cells may remain metabolically active.
C)  either there is a balance between cell division and cell death or there is a cessation of cell division even though the cells may remain metabolically active.
D)  none of the choicesASME) B) and C)
F) A) and B)

Question 18

Which of the following is the correct order for binary fission?

Accepted Answer

A)  A septum forms at midcell,the cell elongates,replicates its chromosome,and separates the chromosome into the two parts of the cell.
B)  The cell elongates,a septum forms at midcell,the cell replicates its chromosome,and separates the chromosome into the two parts of the cell.
C)  The cell elongates,replicates its chromosome,and separates the chromosome into the two parts of the cell,and a septum forms at midcell.
D)  None of these.ASME) A) and B)
F) A) and C)

Question 19

Organisms that grow near deep-sea volcanic vents are likely to be

Accepted Answer

A)  psychrophilic.
B)  psychrotrophic.
C)  mesophilic.
D)  thermophilic.ASME) None of the above
F) C) and D)

Question 20

Growth media that will support the growth of many different types of microorganisms are called __________ __________ growth media,whereas those that are supplemented by blood or other rich nutrient sources in order to support the growth of fastidious organisms are called __________ media.

Accepted Answer

general pu...

Exam 7: Microbial Growth

A common type of autoinducer found in gram-negative bacteria are acyl homoserine lactones (AHL).

Correct AnswerverifiedShow Answer

A given medium can be either selective or differential but not both.

Correct AnswerverifiedFalse

You would like to culture a bacterium that is growing in the lung of a human patient with pneumonia.Which media would be of most use in culturing this organism?

Correct AnswerverifiedD

A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called __________ culture system.

Correct AnswerverifiedShow Answer

The purpose of the penicillin binding proteins is to link phospholipids together in the cellular membrane.

Correct AnswerverifiedShow Answer

A microbial environment containing high nutrient concentrations is called an oligotrophic environment.

Correct AnswerverifiedFalse

Membranes of some thermophilic Archaea are stabilized by ether linked phospholipids.

Correct AnswerverifiedShow Answer

Organisms that require increased pressure for optimum growth are called

Correct AnswerverifiedShow Answer

Organisms that grow well at 0 °\degree° C and have optimum growth temperatures of 15 °\degree° C or lower are called

Correct AnswerverifiedShow Answer

Organisms that grow near deep-sea volcanic vents are likely to be

Correct AnswerverifiedShow Answer

Organisms that ignore oxygen and grow equally well in its presence or absence are called

Correct AnswerverifiedShow Answer

When a young,vigorously growing culture of bacteria is transferred to fresh medium of the same composition,the lag phase is usually short or absent.

Correct AnswerverifiedShow Answer

Blood agar is both a differential and enriched medium.

Correct AnswerverifiedShow Answer

When a microorganism is placed in a(n) __________ solution,water will enter into the cell and cause it to burst unless something is done to prevent this.

Correct AnswerverifiedShow Answer

Organisms that have their optimum growth pH between 5.5 and 8.0 are called __________. ASM

Correct AnswerverifiedShow Answer

Organisms that are not drastically affected by increased pressure are called

Correct AnswerverifiedShow Answer

The total number of viable microorganisms remains constant in stationary phase because

Correct AnswerverifiedShow Answer

Which of the following is the correct order for binary fission?

Correct AnswerverifiedShow Answer

Organisms that grow near deep-sea volcanic vents are likely to be

Correct AnswerverifiedShow Answer

Growth media that will support the growth of many different types of microorganisms are called __________ __________ growth media,whereas those that are supplemented by blood or other rich nutrient sources in order to support the growth of fastidious organisms are called __________ media.

Correct Answerverifiedgeneral pu...View AnswerShow Answer

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False

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Organisms that grow well at 0 $\degree$ C and have optimum growth temperatures of 15 $\degree$ C or lower are called

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Growth media that will support the growth of many different types of microorganisms are called growth media,whereas those that are supplemented by blood or other rich nutrient sources in order to support the growth of fastidious organisms are called __ media.

Correct Answer
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general pu...
View Answer