BIO 340 Final Exam - Questions with Verified Answers| Latest Update Graded A+
An F+ microbial strain would best be described as:
A) any bacterium that readily takes up naked DNA through its membrane.
B) incapable of conjugation due to inhibitory genes on the F plasmid.
C) a bacterial strain with specific auxotrophic characteristics.
D) a bacterial strain that carries a phage with membrane fusion competency.
E) a bacterium with a plasmid that confers conjugation competency. E) a bacterium with a
plasmid that confers conjugation competency.
To demonstrate transformation of bacteria, one could:
A) extract DNA from an auxotroph and add it to prototrophic cells.
B) extract DNA from arg- cells and add it to arg+ cells.
C) extract DNA from arg+ cells and add it to arg- cells.
D) extract DNA from StrS cells and add it to StrR cells.
E) mix the DNA from arg+ and arg- cells to allow recombination. C) extract DNA from arg+
cells and add it to arg- cells.
From one F+ strain, three distinct Hfr strains were derived. The first three markers transferred
during an Hfr X F- cross to a different F- each time are:
Hfr 1: . . . D A F→
Hfr 2: . . . E B F→
Hfr 3: . . . E C D→
Which of the following must be the order of the genes on the bacterial chromosomal circle? (A
is shown at both ends to represent circularity. Assume that the Hfr picks up all intermediates
between any two represented genes.)
A) A D C E B F A
, B) A B C D F E A
C) A C D F E B A
D) A E F B C D A
E) A F B D E C A A) A D C E B F A
If two markers are closely linked, they will show:
A) a high frequency of recombination and a high frequency of co-transformation.
B) a high frequency of recombination and a low frequency of co-transformation.
C) a low frequency of recombination and a high frequency of co-transformation.
D) a low frequency of recombination and a high frequency of co-transformation.
E) the same frequency of recombination and frequency of co-transformation. C) a low
frequency of recombination and a high frequency of co-transformation.
A wild-type chromosome can be represented as ABC[*]DEFGH, and from this a chromosomal
aberration arises that can be represented ABC[*]DEGFH, where [*] represents the centromere.
This aberration is known as a:
A) deletion.
B) duplication.
C) paracentric inversion.
D) pericentric inversion.
E) translocation. C) paracentric inversion.
A particular hybrid species is defined as 3n = 12. It is discovered that at meiosis, pairing is
always univalent + bivalent (never trivalent) in this species. How many bivalents will be present
in prophase of meiosis I?
A) 2
An F+ microbial strain would best be described as:
A) any bacterium that readily takes up naked DNA through its membrane.
B) incapable of conjugation due to inhibitory genes on the F plasmid.
C) a bacterial strain with specific auxotrophic characteristics.
D) a bacterial strain that carries a phage with membrane fusion competency.
E) a bacterium with a plasmid that confers conjugation competency. E) a bacterium with a
plasmid that confers conjugation competency.
To demonstrate transformation of bacteria, one could:
A) extract DNA from an auxotroph and add it to prototrophic cells.
B) extract DNA from arg- cells and add it to arg+ cells.
C) extract DNA from arg+ cells and add it to arg- cells.
D) extract DNA from StrS cells and add it to StrR cells.
E) mix the DNA from arg+ and arg- cells to allow recombination. C) extract DNA from arg+
cells and add it to arg- cells.
From one F+ strain, three distinct Hfr strains were derived. The first three markers transferred
during an Hfr X F- cross to a different F- each time are:
Hfr 1: . . . D A F→
Hfr 2: . . . E B F→
Hfr 3: . . . E C D→
Which of the following must be the order of the genes on the bacterial chromosomal circle? (A
is shown at both ends to represent circularity. Assume that the Hfr picks up all intermediates
between any two represented genes.)
A) A D C E B F A
, B) A B C D F E A
C) A C D F E B A
D) A E F B C D A
E) A F B D E C A A) A D C E B F A
If two markers are closely linked, they will show:
A) a high frequency of recombination and a high frequency of co-transformation.
B) a high frequency of recombination and a low frequency of co-transformation.
C) a low frequency of recombination and a high frequency of co-transformation.
D) a low frequency of recombination and a high frequency of co-transformation.
E) the same frequency of recombination and frequency of co-transformation. C) a low
frequency of recombination and a high frequency of co-transformation.
A wild-type chromosome can be represented as ABC[*]DEFGH, and from this a chromosomal
aberration arises that can be represented ABC[*]DEGFH, where [*] represents the centromere.
This aberration is known as a:
A) deletion.
B) duplication.
C) paracentric inversion.
D) pericentric inversion.
E) translocation. C) paracentric inversion.
A particular hybrid species is defined as 3n = 12. It is discovered that at meiosis, pairing is
always univalent + bivalent (never trivalent) in this species. How many bivalents will be present
in prophase of meiosis I?
A) 2
