LSU BIOL 1202 (HRINCEVICH) CH. 27 HW FREQUENTLY TESTED
ACTUAL EXAM QUESTIONS AND ANSWERS
Question 1.
What is the function of fimbriae? a. They protect the cell from dehydration. b. They are
used in motility. c. They are used to transfer DNA during conjugation. d. They are
components of the outer cell wall in gram-negative bacteria. e. They are used to attach the
cell to its substrate or to other prokaryotes.
Correct Answer: e. They are used to attach the cell to its substrate or to other
prokaryotes.
Question 2.
What is the difference donor? a. The Hfr donor has chromosome, but b. The Hfr donor has
not. c. The Hfr donor has does not. d. The F+ donor has not.
Correct Answer: between an F+ donor and an Hfr a. The Hfr donor has an F
factor integrated into an F factor integrated into its main its main chromosome,
but the F+ donor does not. the F+ donor does not. an F factor, but the F+ donor
does an F plasmid, but the F+ donor an F factor, but the Hfr donor does
Question 3.
What usually happens to the recipient cell following conjugation with an Hfr cell? a. The
recipient cell becomes an Hfr cell. b. The recipient cell remains an F+ cell. c. The recipient
cell may become either an F+ or an Hfr cell. d. The recipient cell remains an F- cell.
Correct Answer: d. The recipient cell remains an F- cell.
Question 4.
Which of the following typically produces a recombinant F+ recipient cell? a. conjugation
between two Hfr cells b. conjugation between an F+ cell and an F- cell c. conjugation
between an Hfr cell and an F- cell d. conjugation between two F- cells
Correct Answer: b. conjugation between an F+ cell and an F- cell
Question 5.
Which of the following chromosome of a the main chromosome a. conjugation between b.
conjugation between c. conjugation between d. conjugation between
Correct Answer: could cause DNA from the main a. conjugation between an
donor cell to be incorporated into Hfr cell and an F- cell of the recipient cell? an
Hfr cell and an F- cell two F+ cells two F- cells an F+ cell and an F- cell
, Question 6.
Suppose conjugation occurs between an Hfr cell and an F- cell. Although not typical, what
would have to occur for the recipient cell to become an Hfr cell? a. A portion of the F factor
would have to be incorporated into the recipient cell's chromosome. b. The entire F factor
would have to be incorporated into the recipient cell's chromosome. c. A portion of the F
plasmid would have to be transferred to the recipient cell. d. The entire F factor would
have to be transferred to the recipient cell.
Correct Answer: b. The entire F factor would have to be incorporated into the
recipient cell's chromosome.
Question 7.
The figure shows how nary fission. Drag priate blanks on the 1. Binary fission is individual
is the sole genes to its offspring. 2. During binary fission, __________ and continues
chromosome. 3. When DNA replication um has reached twice grows inward, dividing ter
cells. 4. In theory, the two other and the parent 5. However, mistakes sometimes result
cleotide sequence 6. The rapid reproduction of many bacterial mutation rate can
Correct Answer: bacteria reproduce through bi- 1. asexual reproduction the
terms on the left to the appro- 2. origin of replication right to complete the
sentences. 3. plasma membrane 4. genetically identical to a form of _________
because a single 5. mutations parent and passes copies of all its 6. genetic
variation DNA replication begins at the all the way around the circular is
complete and the bacteriits original size, the __________ the parent cell into two
daugh- daughter cells are _________ each cell. made during DNA replication in
_________ , changes to the nu-of DNA. and large population sizes populations
mean that even a small lead to considerable _________.
Question 8.
Because bacteria reproduce typically obtains its ent. However, bacteria ing together DNA
these mechanisms that results in the from one bacterium The figure shows two tion. In
these examples, DNA called an F factor An F factor is a piece genes. Most of the genes
production of a structure mating bridge links tion, allowing for DNA The F factor may be
called an F plasmid, may be found within shown in part (b) of Drag each phrase on
whether it applies an F- cell. (Remember conjugation involving mechanisms for
transferring
Correct Answer: asexually, each organism F+ cell: genetic material from only
one par- - carries the F factor in a do have mechanisms for bring- plasmid from
different individuals. One of - may donate a plasmid to is bacterial conjugation,
a process another cell direct transfer of genetic material Hfr cell: to another. -
carries the F factor in its examples of bacterial conjugacircular chromosome
bacteria with a segment of - may donate genes from are able to initiate
conjugation. its chromosome to anothof DNA that contains about 25 er cell in
the F factor are related to the F- cell: called a mating bridge. The - may become
F+ after two bacterial cells during conjugaconjunction with an F+ transfer. cell
found on a separate piece of DNA - may receive genetic ma-shown in part (a) of
ACTUAL EXAM QUESTIONS AND ANSWERS
Question 1.
What is the function of fimbriae? a. They protect the cell from dehydration. b. They are
used in motility. c. They are used to transfer DNA during conjugation. d. They are
components of the outer cell wall in gram-negative bacteria. e. They are used to attach the
cell to its substrate or to other prokaryotes.
Correct Answer: e. They are used to attach the cell to its substrate or to other
prokaryotes.
Question 2.
What is the difference donor? a. The Hfr donor has chromosome, but b. The Hfr donor has
not. c. The Hfr donor has does not. d. The F+ donor has not.
Correct Answer: between an F+ donor and an Hfr a. The Hfr donor has an F
factor integrated into an F factor integrated into its main its main chromosome,
but the F+ donor does not. the F+ donor does not. an F factor, but the F+ donor
does an F plasmid, but the F+ donor an F factor, but the Hfr donor does
Question 3.
What usually happens to the recipient cell following conjugation with an Hfr cell? a. The
recipient cell becomes an Hfr cell. b. The recipient cell remains an F+ cell. c. The recipient
cell may become either an F+ or an Hfr cell. d. The recipient cell remains an F- cell.
Correct Answer: d. The recipient cell remains an F- cell.
Question 4.
Which of the following typically produces a recombinant F+ recipient cell? a. conjugation
between two Hfr cells b. conjugation between an F+ cell and an F- cell c. conjugation
between an Hfr cell and an F- cell d. conjugation between two F- cells
Correct Answer: b. conjugation between an F+ cell and an F- cell
Question 5.
Which of the following chromosome of a the main chromosome a. conjugation between b.
conjugation between c. conjugation between d. conjugation between
Correct Answer: could cause DNA from the main a. conjugation between an
donor cell to be incorporated into Hfr cell and an F- cell of the recipient cell? an
Hfr cell and an F- cell two F+ cells two F- cells an F+ cell and an F- cell
, Question 6.
Suppose conjugation occurs between an Hfr cell and an F- cell. Although not typical, what
would have to occur for the recipient cell to become an Hfr cell? a. A portion of the F factor
would have to be incorporated into the recipient cell's chromosome. b. The entire F factor
would have to be incorporated into the recipient cell's chromosome. c. A portion of the F
plasmid would have to be transferred to the recipient cell. d. The entire F factor would
have to be transferred to the recipient cell.
Correct Answer: b. The entire F factor would have to be incorporated into the
recipient cell's chromosome.
Question 7.
The figure shows how nary fission. Drag priate blanks on the 1. Binary fission is individual
is the sole genes to its offspring. 2. During binary fission, __________ and continues
chromosome. 3. When DNA replication um has reached twice grows inward, dividing ter
cells. 4. In theory, the two other and the parent 5. However, mistakes sometimes result
cleotide sequence 6. The rapid reproduction of many bacterial mutation rate can
Correct Answer: bacteria reproduce through bi- 1. asexual reproduction the
terms on the left to the appro- 2. origin of replication right to complete the
sentences. 3. plasma membrane 4. genetically identical to a form of _________
because a single 5. mutations parent and passes copies of all its 6. genetic
variation DNA replication begins at the all the way around the circular is
complete and the bacteriits original size, the __________ the parent cell into two
daugh- daughter cells are _________ each cell. made during DNA replication in
_________ , changes to the nu-of DNA. and large population sizes populations
mean that even a small lead to considerable _________.
Question 8.
Because bacteria reproduce typically obtains its ent. However, bacteria ing together DNA
these mechanisms that results in the from one bacterium The figure shows two tion. In
these examples, DNA called an F factor An F factor is a piece genes. Most of the genes
production of a structure mating bridge links tion, allowing for DNA The F factor may be
called an F plasmid, may be found within shown in part (b) of Drag each phrase on
whether it applies an F- cell. (Remember conjugation involving mechanisms for
transferring
Correct Answer: asexually, each organism F+ cell: genetic material from only
one par- - carries the F factor in a do have mechanisms for bring- plasmid from
different individuals. One of - may donate a plasmid to is bacterial conjugation,
a process another cell direct transfer of genetic material Hfr cell: to another. -
carries the F factor in its examples of bacterial conjugacircular chromosome
bacteria with a segment of - may donate genes from are able to initiate
conjugation. its chromosome to anothof DNA that contains about 25 er cell in
the F factor are related to the F- cell: called a mating bridge. The - may become
F+ after two bacterial cells during conjugaconjunction with an F+ transfer. cell
found on a separate piece of DNA - may receive genetic ma-shown in part (a) of
