Question 1

A researcher is looking for met-strains. He compares two plates. One plate has colonies growing on complete medium. The other plate has colonies growing on methionine-deficient medium. How can the researcher determine which colonies are met-?

Accepted Answer

A)   The colonies growing on the methionine-deficient plate are met-.
B)   Colonies growing on the complete medium, but not on the methionine-deficient medium are met-.
C)   More experiments must be performed to identify the met-colonies.
D)   All of the colonies growing on the complete medium are met-.
E)   Colonies growing on the methionine-deficient medium, but not on complete medium are met-.

Question 2

Genetic recombination can occur ____.

Accepted Answer

A)   during DNA replication
B)   during asexual reproduction
C)   during mitosis
D)   from an Hfr X F-conjugation
E)   from an F+X F-conjugation

Question 3

Auxotrophs ____.

Accepted Answer

A)   are nutritional-requirement mutants
B)   can grow on minimal media
C)   feed on proteins
D)   make their own nutrients
E)   produce antibiotics

Question 4

The ability to conjugate depends on the presence of a plasmid called the ____ within the donor cell.

Accepted Answer

A)   X factor
B)   F factor
C)   C factor
D)   sex pilus
E)   S factor

Question 5

Match between columns
                        Premises: Tobacco mosaic virus
T-even bacteriophage
Herpes virus
Adenovirus

Accepted Answer

The Answer of Enveloped virus and Helical virus and Polyhedral is...

Question 6

Following genetic recombination, ____.

Accepted Answer

A)   the bacterial cell is unable to divide
B)   the bacterial cell is no longer able to replicate its DNA
C)   the bacterial cell is a partial haploid
D)   any remnants of DNA that did not contribute to the genetic recombination form plasmids
E)   all progeny of the recombinant cell contain the new gene combination

Question 7

The F factor can be integrated into the bacterial chromosome through ____.

Accepted Answer

A)   mitosis
B)   DNA replication
C)   transcription
D)   crossover events
E)   transduction

Question 8

Electroporation ____.

Accepted Answer

A)   exposes cells briefly to rapid pulses of electrical current to induce transformation
B)   exposes cells to calcium ions to induce transformation
C)   exposes cells to calcium ions to induce transduction
D)   inserts the foreign DNA into chloroplast DNA
E)   inserts the foreign DNA into mitochondrial DNA

Question 9

DNA can be transferred from one bacterial cell to another by ____.

Accepted Answer

A)   conjugation only
B)   transformation only
C)   conjugation and transformation only
D)   conjugation and transduction only
E)   conjugation, transformation, and transduction

Question 10

In an Hfr X F-conjugation, ____.

Accepted Answer

A)   the Hfr cell can lose chromosomal genes that it transfers to the F-cell
B)   the donor cell can become a partial diploid
C)   plasmid DNA is transferred from the Hfr cell to the F-cell
D)   chromosomal DNA can be transferred from the F-cell to the Hfr cell
E)   chromosomal DNA can be transferred from the Hfr cell to the F-cell

Question 11

All viruses have genes encoding ____.

Accepted Answer

A)   the proteins of their capsid
B)   enzymes required for nucleic acid replication
C)   the proteins of their capsid and enzymes required for nucleic acid replication
D)   a plasma membrane
E)   the proteins of their capsid and a plasma membrane

Question 12

In Lederberg and Tatum's experiments with E. coli auxotrophs, they found that when cells of two mutant strains were cultured together, ____.

Accepted Answer

A)   cells were able to grow on minimal medium supplemented with nutrients required by the first mutant strain
B)   cells were able to grow on minimal medium supplemented with nutrients required by the second mutant strain
C)   some cells were able to grow on minimal medium
D)   no cells were able to grow on minimal medium
E)   cells were able to grow in liquid medium, but not on gel-like medium containing agar

Question 13

-indicates the ____. A)  normal allele B)  mutant allele C)  bacterium is biologically active D)  bacterium is biologically inactive E)  bacterium can make its own methionine" class="answers-bank-image d-inline" rel="preload" > Figure 17.1
Use the accompanying figure .
The gene that governs a cell's ability to synthesize methionine from inorganic precursors is labeled " met ." The designation met-indicates the ____.

Accepted Answer

A)   normal allele
B)   mutant allele
C)   bacterium is biologically active
D)   bacterium is biologically inactive
E)   bacterium can make its own methionine

Question 14

Cultures of genetically identical cells are called ____.

Accepted Answer

A)   bacteriophages
B)   clones
C)   prophages
D)   prions
E)   auxotrophs

Question 15

Bacteriophage lambda ____.

Accepted Answer

A)   is a temperate phage
B)   is a virulent phage
C)   infects plant cells
D)   infects animal cells
E)   is a T-even phage

Question 16

In transduction, bacterial cells ____.

Accepted Answer

A)   take up pieces of DNA that are released as other cells disintegrate
B)   receive DNA from an infecting phage
C)   replicate DNA molecules
D)   make replicate copies of one another
E)   generate their own DNA

Question 17

If a phage is carrying host cell DNA fragments inside its capsid and then infects another bacterial cell, ____.

Accepted Answer

A)   it causes the recipient bacterium to shrink in size
B)   it kills the recipient bacterium in a matter of minutes
C)   it assembles a new organism that is a cross between the phage and the recipient bacterium
D)   it will not kill the recipient because it lacks the bacteriophage genome.
E)   it transforms the new recipient into a bacteriophage

Question 18

Exposing E. coli to calcium ions and DNA and then incubating the culture at low temperatures in the presence of ice followed by a quick heat shock induces ____.

Accepted Answer

A)   artificial transformation
B)   a double crossover
C)   a single crossover
D)   DNA replication
E)   infection

Question 19

Escherichia coli bacteria ____.

Accepted Answer

A)   has only recently been employed in scientific research
B)   can undergo natural transformation
C)   is a disease caused by prions
D)   replicates slowly
E)   can be infected by bacteriophages

Question 20

A complete viral particle is called a ____.

Accepted Answer

A)   capsule
B)   virion
C)   capsid
D)   viroid
E)   prophage

Exam 17: Bacterial and Viral Genetics

Figure 17.1 Use the accompanying figure . The gene that governs a cell's ability to synthesize methionine from inorganic precursors is labeled " met ." The designation met^-indicates the ____.

Correct Answer
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In an Hfr X F^-conjugation, ____.

Correct Answer
verified

Auxotrophs ____.

Correct Answer
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The ability to conjugate depends on the presence of a plasmid called the ____ within the donor cell.

Correct Answer
verified

Escherichia coli bacteria ____.

Correct Answer
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Electroporation ____.

Correct Answer
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Exposing E. coli to calcium ions and DNA and then incubating the culture at low temperatures in the presence of ice followed by a quick heat shock induces ____.

Correct Answer
verified

If a phage is carrying host cell DNA fragments inside its capsid and then infects another bacterial cell, ____.

Correct Answer
verified

DNA can be transferred from one bacterial cell to another by ____.

Correct Answer
verified

The F factor can be integrated into the bacterial chromosome through ____.

Correct Answer
verified

In transduction, bacterial cells ____.

Correct Answer
verified

Match each virus with its structure.

Bacteriophage lambda ____.

Correct Answer
verified

All viruses have genes encoding ____.

Correct Answer
verified

Following genetic recombination, ____.

Correct Answer
verified

Genetic recombination can occur ____.

Correct Answer
verified

Cultures of genetically identical cells are called ____.

Correct Answer
verified

A complete viral particle is called a ____.

Correct Answer
verified

A researcher is looking for met^-strains. He compares two plates. One plate has colonies growing on complete medium. The other plate has colonies growing on methionine-deficient medium. How can the researcher determine which colonies are met^-?

Correct Answer
verified

In Lederberg and Tatum's experiments with E. coli auxotrophs, they found that when cells of two mutant strains were cultured together, ____.

Correct Answer
verified

Exam 17: Bacterial and Viral Genetics

Figure 17.1 Use the accompanying figure . The gene that governs a cell's ability to synthesize methionine from inorganic precursors is labeled " met ." The designation met-indicates the ____.

Correct AnswerverifiedShow Answer

In an Hfr X F-conjugation, ____.

Correct AnswerverifiedShow Answer

Auxotrophs ____.

Correct AnswerverifiedShow Answer

The ability to conjugate depends on the presence of a plasmid called the ____ within the donor cell.

Correct AnswerverifiedShow Answer

Escherichia coli bacteria ____.

Correct AnswerverifiedShow Answer

Electroporation ____.

Correct AnswerverifiedShow Answer

Exposing E. coli to calcium ions and DNA and then incubating the culture at low temperatures in the presence of ice followed by a quick heat shock induces ____.

Correct AnswerverifiedShow Answer

If a phage is carrying host cell DNA fragments inside its capsid and then infects another bacterial cell, ____.

Correct AnswerverifiedShow Answer

DNA can be transferred from one bacterial cell to another by ____.

Correct AnswerverifiedShow Answer

The F factor can be integrated into the bacterial chromosome through ____.

Correct AnswerverifiedShow Answer

In transduction, bacterial cells ____.

Correct AnswerverifiedShow Answer

Match each virus with its structure.

Bacteriophage lambda ____.

Correct AnswerverifiedShow Answer

All viruses have genes encoding ____.

Correct AnswerverifiedShow Answer

Following genetic recombination, ____.

Correct AnswerverifiedShow Answer

Genetic recombination can occur ____.

Correct AnswerverifiedShow Answer

Cultures of genetically identical cells are called ____.

Correct AnswerverifiedShow Answer

A complete viral particle is called a ____.

Correct AnswerverifiedShow Answer

A researcher is looking for met-strains. He compares two plates. One plate has colonies growing on complete medium. The other plate has colonies growing on methionine-deficient medium. How can the researcher determine which colonies are met-?

Correct AnswerverifiedShow Answer

In Lederberg and Tatum's experiments with E. coli auxotrophs, they found that when cells of two mutant strains were cultured together, ____.

Correct AnswerverifiedShow Answer

Figure 17.1 Use the accompanying figure . The gene that governs a cell's ability to synthesize methionine from inorganic precursors is labeled " met ." The designation met^-indicates the ____.

Correct Answer
verified

In an Hfr X F^-conjugation, ____.

Correct Answer
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A researcher is looking for met^-strains. He compares two plates. One plate has colonies growing on complete medium. The other plate has colonies growing on methionine-deficient medium. How can the researcher determine which colonies are met^-?

Correct Answer
verified

Correct Answer
verified