Question 1

Microbially produced glycolipid surfactants are used for

Accepted Answer

A)   emulsification and increasing detergency, which aids in biodegradability.
B)   solubilization of hydrophobic compounds, which enhances cleanup and recovery of oil from spills.
C)   prevention or reduction of microbial growth on surfaces, decreasing transmission of disease.
D)   both emulsification and increasing detergency and solubilization of hydrophobic compounds
E)   both emulsification and increasing detergency and prevention or reduction of microbial growth on surfaces D

Question 2

In the process of protoplast fusion, cells are grown in a medium that contains

Accepted Answer

A)   DNA ligases.
B)   lysozyme for bacteria.
C)   chitinase for yeast.
D)   RNAses.
E)   either lysozyme or chitinase, depending on the type of cells.

Question 3

A major advantage of protoplast fusion is the fact that

Accepted Answer

A)   the microbes are rendered harmless by the process.
B)   protoplasts of different microbial species can be fused.
C)   the protoplast condition can easily be maintained indefinitely.
D)   all of the choices

Question 4

Primary metabolites

Accepted Answer

A)   include compounds such as antibiotics and mycotoxins.
B)   include bacteriocins and other similar cytotoxic compounds.
C)   are compounds needed for the synthesis of microbial cells in the primary growth phase.
D)   are compounds that accumulate during the period after primary growth phase and have no direct relationship to the synthesis of cell materials.

Question 5

Corynebacterium glutamicum is used to produce glutamic acid, and this is most successful when the cell permeability is

Accepted Answer

A)   increased.
B)   decreased.
C)   not changed.
D)   isotonic.

Question 6

__________ are formed by certain bacteria that convert iron to magnetite; these structures are of interest to ______________ because they are despite the fact that they are perfectly formed despite the fact they are only tens of nanometers in diameter.

Accepted Answer

Magnetosom...

Question 7

Molecules produced by a cell that are not directly related to the synthesis of cell materials and that are usually produced after the growth phase has ended are called __________ __________.

Accepted Answer

secondary ...

Question 8

Most antibiotics are produced by

Accepted Answer

A)   unicellular bacteria.
B)   actinomycetes.
C)   yeasts.
D)   protozoa.

Question 9

The Ti plasmid has been genetically engineered to improve its utility as a cloning vector by all of the following except

Accepted Answer

A)   elements found in other vectors, such as selectable markers and multicloning sites have been added.
B)   genes responsible for resisting infection with B. thuringiensis have been added.
C)   nonessential regions, including tumor-inducing genes, have been deleted.
D)   genes required for the actual infection of the plant cell by the plasmid are retained.

Question 10

Phenylacetic acid is added to the penicillin fermentation to allow incorporation of which side chain group?

Accepted Answer

A)   acetyl
B)   benzyl
C)   methyl
D)   propyl

Question 11

The medium used in protoplast fusion experiments is

Accepted Answer

A)   isotonic.
B)   hypotonic.
C)   hypertonic.
D)   none of the choices

Question 12

The major organism used in the microbial production of citric acid is

Accepted Answer

A)   Penicillium notatum.
B)   Rhizopus nigrificans.
C)   Aspergillus niger.
D)   Lactobacillus delbrueckii.

Question 13

The first penicillin-producing fungus that could be grown in stirred fermenters was

Accepted Answer

A)   Penicillium notatum.
B)   Aspergillus niger.
C)   Penicillium chrysogenum.
D)   Pisolithus tinctorius.

Question 14

To assure maximum production of desired metabolites, it is always necessary to maintain organisms in active logarithmic growth.

Accepted Answer

A) True 
 B)False

Question 15

An amino acid that is used as a supplement for breads is

Accepted Answer

A)   leucine.
B)   aspartate.
C)   proline.
D)   lysine.

Question 16

To industrial microbiologists, fermentation means the mass culture of microorganisms.

Accepted Answer

A) True 
 B)False  True

Question 17

Diatom shells, when incubated at 900$\degree$C in an atmosphere of silicon for several hours, undergo an atom-for-atom substitution of magnesium with silicon without loss of three-dimensional structure

Accepted Answer

A) True 
 B)False

Question 18

Production of semisynthetic penicillins involves chemical modification of a penicillin product after it has been released from penicillin producing cells.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is a reason why bioconversions are replacing chemical synthesis of certain compounds?

Accepted Answer

A)   Bioconversions facilitate the scaling up of reactions.
B)   Enzymes catalysts are not destroyed in the bioconversion process.
C)   Bioconversions yield specific and biologically active stereoisomers.
D)   Enzyme catalyzed reactions in the bioconversion process proceed much more rapidly.

Question 20

Penicillin is produced by some

Accepted Answer

A)   bacteria.
B)   fungi.
C)   actinomycetes.
D)   protozoan. B

Exam 41: Industrial Microbiology

Microbially produced glycolipid surfactants are used for

Correct AnswerverifiedD

In the process of protoplast fusion, cells are grown in a medium that contains

Correct AnswerverifiedShow Answer

A major advantage of protoplast fusion is the fact that

Correct AnswerverifiedShow Answer

Primary metabolites

Correct AnswerverifiedShow Answer

Corynebacterium glutamicum is used to produce glutamic acid, and this is most successful when the cell permeability is

Correct AnswerverifiedShow Answer

__________ are formed by certain bacteria that convert iron to magnetite; these structures are of interest to ______________ because they are despite the fact that they are perfectly formed despite the fact they are only tens of nanometers in diameter.

Correct AnswerverifiedMagnetosom...View AnswerShow Answer

Molecules produced by a cell that are not directly related to the synthesis of cell materials and that are usually produced after the growth phase has ended are called __________ __________.

Correct Answerverifiedsecondary ...View AnswerShow Answer

Most antibiotics are produced by

Correct AnswerverifiedShow Answer

The Ti plasmid has been genetically engineered to improve its utility as a cloning vector by all of the following except

Correct AnswerverifiedShow Answer

Phenylacetic acid is added to the penicillin fermentation to allow incorporation of which side chain group?

Correct AnswerverifiedShow Answer

The medium used in protoplast fusion experiments is

Correct AnswerverifiedShow Answer

The major organism used in the microbial production of citric acid is

Correct AnswerverifiedShow Answer

The first penicillin-producing fungus that could be grown in stirred fermenters was

Correct AnswerverifiedShow Answer

To assure maximum production of desired metabolites, it is always necessary to maintain organisms in active logarithmic growth.

Correct AnswerverifiedShow Answer

An amino acid that is used as a supplement for breads is

Correct AnswerverifiedShow Answer

To industrial microbiologists, fermentation means the mass culture of microorganisms.

Correct AnswerverifiedTrue

Diatom shells, when incubated at 900 °\degree° C in an atmosphere of silicon for several hours, undergo an atom-for-atom substitution of magnesium with silicon without loss of three-dimensional structure

Correct AnswerverifiedShow Answer

Production of semisynthetic penicillins involves chemical modification of a penicillin product after it has been released from penicillin producing cells.

Correct AnswerverifiedShow Answer

Which of the following is a reason why bioconversions are replacing chemical synthesis of certain compounds?

Correct AnswerverifiedShow Answer

Penicillin is produced by some

Correct AnswerverifiedB

Correct Answer
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D

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are formed by certain bacteria that convert iron to magnetite; these structures are of interest to ____ because they are despite the fact that they are perfectly formed despite the fact they are only tens of nanometers in diameter.

Correct Answer
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Magnetosom...
View Answer

Molecules produced by a cell that are not directly related to the synthesis of cell materials and that are usually produced after the growth phase has ended are called .

Correct Answer
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secondary ...
View Answer

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True

Diatom shells, when incubated at 900 $\degree$ C in an atmosphere of silicon for several hours, undergo an atom-for-atom substitution of magnesium with silicon without loss of three-dimensional structure

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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B