Which of the following would probably be least effective for killing bacteria? U

Question

Which of the following would probably be least effective for killing bacteria?

Ultrasound

Gamma radiation

Osmotic pressure

Cold temperatures

All would be equally effective

2.70000 points

Question 6

Which of the following methods of control would best be described as sterilization?

Pasteurization

Autoclave

Filtration

Osmotic pressure

2.70000 points

Question 7

Base substitution

A. Replicates a segment of DNA

B. Removes a segment (or base) of DNA and alters enzyme activity

C. Changes one base pair to another; often no effect

D. Reverses the order of a segment

E. Moves a segment of DNA to a new location

2.70000 points

Question 8

Inversion

A. Replicates a segment of DNA

B. Removes a segment (or base) of DNA and alters enzyme activity

C. Changes one base pair to another; often no effect

D. Reverses the order of a segment

E. Moves a segment of DNA to a new location

2.70000 points

Question 9

Transposition

A. Replicates a segment of DNA

B. Removes a segment (or base) of DNA and alters enzyme activity

C. Changes one base pair to another; often no effect

D. Reverses the order of a segment

E. Moves a segment of DNA to a new location

2.70000 points

Question 10

Deletion

A. Replicates a segment of DNA

B. Removes a segment (or base) of DNA and alters enzyme activity

C. Changes one base pair to another; often no effect

D. Reverses the order of a segment

E. Moves a segment of DNA to a new location

2.70000 points

Question 11

Duplication

A. Replicates a segment of DNA

B. Removes a segment (or base) of DNA and alters enzyme activity

C. Changes one base pair to another; often no effect

D. Reverses the order of a segment

E. Moves a segment of DNA to a new location

2.70000 points

Question 12

Insert cloning vector into E. coli by transformation

A. 2

B. 3

C. 1

D. 4

E. 5

2.70000 points

Question 13

Splice the genes into a cloning vector

A. 2

B. 3

C. 1

D. 4

E. 5

2.70000 points

Question 14

Obtain genes with a desirable trait, and plasmids

A. 2

B. 3

C. 1

D. 4

E. 5

2.70000 points

Question 15

Assure that the desired gene is successfully incorporated (by growing bacteria on antibiotic medium, for example)

A. 2

B. 3

C. 1

D. 4

E. 5

2.70000 points

Question 16

Growing (propagating) bacteria that has the desirable trait

A. 2

B. 3

C. 1

D. 4

E. 5

2.70000 points

Question 17

Phenols and phenolics

A. Reduce surface tension

B. Disrupt plasma membrane

C. Oxidize

D. Denature enzymes

2.70000 points

Question 18

Detergents

A. Reduce surface tension

B. Disrupt plasma membrane

C. Oxidize

D. Denature enzymes

2.70000 points

Question 19

Ethylene oxide

A. Reduce surface tension

B. Disrupt plasma membrane

C. Oxidize

D. Denature enzymes

2.70000 points

Question 20

Alcohols

A. Reduce surface tension

B. Disrupt plasma membrane

C. Oxidize

D. Denature enzymes

2.70000 points

Question 21

Antiseptic

A. Destroys pathogens on inanimate objects

B. Destroys pathogens on skin

C. Kills bacteria

D. Stops bacterial growth

E. "Safe and acceptable" levels

2.70000 points

Question 22

Bactericide

A. Destroys pathogens on inanimate objects

B. Destroys pathogens on skin

C. Kills bacteria

D. Stops bacterial growth

E. "Safe and acceptable" levels

2.70000 points

Question 23

Bacteriostat

A. Destroys pathogens on inanimate objects

B. Destroys pathogens on skin

C. Kills bacteria

D. Stops bacterial growth

E. "Safe and acceptable" levels

2.70000 points

Question 24

Disinfectant

A. Destroys pathogens on inanimate objects

B. Destroys pathogens on skin

C. Kills bacteria

D. Stops bacterial growth

E. "Safe and acceptable" levels

2.70000 points

Question 25

Sanitizer

A. Destroys pathogens on inanimate objects

B. Destroys pathogens on skin

C. Kills bacteria

D. Stops bacterial growth

E. "Safe and acceptable" levels

2.70000 points

Question 26

A gene that is continually transcribed is called inducible.

True

False

2.70000 points

Question 27

One of the disadvantages of using boiling water to sterilize is its inabilty to kill spores.

True

False

2.70000 points

Question 28

In the Ames test, a chemical causes the mutation of Salmonella. This means that the chemcal is carcinogenic.

True

False

2.70000 points

Question 29

Which of the following is not a base of DNA?

Adenine

Cytosine

Guanine

Thymine

Uracil

2.70000 points

Question 30

If DNA from a dead cell is incorporated into a live cell and the resulting cell is changed, the process is:

Transcription

Translation

Transformation

Transduction

Conjugation

2.70000 points

Question 31

The lactose operon will not producee lactose degradation enzymes if lactose is not present. Those enzymes would be considered inducible.

True

False

2.70000 points

Question 32

Transcription refers to the production of a strand of RNA from DNA.

True

False

Question 33

Which of the following processes uses a structure called a sex pilus for transferring genetic material?

Transcription

Translation

Transformation

Transduction

Conjugation

2.70000 points

A donor cell can become a recipient during conjugation.

True

False

Question 35

Which of the following processes employs a bacteriophage?

Transcription

Translation

Transformation

Transduction

Conjugation

Question 36

Pasteurization is not a form of sterilization.

True

False

Question 37

Disinfection will kill all life forms in a given area.

True

False

A.

Ultrasound

B.

Gamma radiation

C.

Osmotic pressure

D.

Cold temperatures

E.

All would be equally effective

Explanation / Answer

Q1. Answer: D) cold temperatures

It has been known for a long time that cold temperatures would not be sufficient to kill the bacteria, but would be definitely sending the bacteria into a dormant state. For many of the researchers, there is a doubt on what is the temperature required to actually kill the bacterial cells. This would be killing bacteria J.D. there is development of ice crystals within the cells, so as to rupture the membranes, but could only be done through rapid freezing. Though, the effectiveness of the method has been a subject of debate.

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