Bio 311 Exam Questions and Answers | Latest
Update | 100% Correct.
A conjugation bridge is a _____.
(complex made of DNA and protein)
(protein complex that recognizes that origin of transfer)
(protein complex that pumps a nucleoprotein out of the donor cell)
(passageway for DNA transfer)
passageway for DNA transfer
During conjugation, the initial contact between the donor and recipient cell involves
structures called sex _______ that are made by F+ strains.
pilli
A complex of DNA and proteins is called a (n) ______.
(conjugation factor)
(ribosome)
(nucleoprotein)
(competence factor)
nucleoprotein
A DNA molecule that can exist independently of the bacterial chromosome is called a (n)
_____.
,pilus
plasmid
episome
competence factor
plasmid
What is the shape of the majority of plasmids?
circular
linear
circular
What is the significance of a plasmid's origin of replication?
(it allows the plasmid to integrate into the bacterial chromosome)
(it allows the plasmid to be copied separately from the bacterial chromosome)
(it allows the plasmid to be maintained in a bacterial cell in the presence of an antibiotic)
(it allows the plasmid to be copied separately from the bacterial chromosome)
What is the F factor that is found in F+ donor strains of E. coli?
(an extra chromosome that is not found in other strains)
(a small circular segment of DNA that is separate from the circular chromosome)
(a gene found on the circular chromosome)
, (a small circular segment of DNA that is separate from the circular chromosome)
How do F+ and F- strains of E. coli differ from one another?
(only F+ strains contain an F factor)
(only F- strains require a nutritional supplement in their growth media)
(only F+ strains can be infected by bacteriophage)
(only F+ strains contain an F factor)
A growth medium that contains only the essential nutrients required for the growth of a
wild-type bacterial species is called a (n) ______ medium.
minimal
What is an auxotroph?
(a bacterial strain that can grow on minimal media that contains only essential nutrients)
(a bacterial strain that cannot be infected by viruses)
(a bacterial strain that required a certain nutrient to be supplemented in its growth
medium)
(a bacterial strain that required a certain nutrient to be supplemented in its growth medium)
A bacterial strain that can synthesize a nutrient (e.g., methionine) and does not require that
nutrient in its growth medium is called a (n) _________.
prototroph
Update | 100% Correct.
A conjugation bridge is a _____.
(complex made of DNA and protein)
(protein complex that recognizes that origin of transfer)
(protein complex that pumps a nucleoprotein out of the donor cell)
(passageway for DNA transfer)
passageway for DNA transfer
During conjugation, the initial contact between the donor and recipient cell involves
structures called sex _______ that are made by F+ strains.
pilli
A complex of DNA and proteins is called a (n) ______.
(conjugation factor)
(ribosome)
(nucleoprotein)
(competence factor)
nucleoprotein
A DNA molecule that can exist independently of the bacterial chromosome is called a (n)
_____.
,pilus
plasmid
episome
competence factor
plasmid
What is the shape of the majority of plasmids?
circular
linear
circular
What is the significance of a plasmid's origin of replication?
(it allows the plasmid to integrate into the bacterial chromosome)
(it allows the plasmid to be copied separately from the bacterial chromosome)
(it allows the plasmid to be maintained in a bacterial cell in the presence of an antibiotic)
(it allows the plasmid to be copied separately from the bacterial chromosome)
What is the F factor that is found in F+ donor strains of E. coli?
(an extra chromosome that is not found in other strains)
(a small circular segment of DNA that is separate from the circular chromosome)
(a gene found on the circular chromosome)
, (a small circular segment of DNA that is separate from the circular chromosome)
How do F+ and F- strains of E. coli differ from one another?
(only F+ strains contain an F factor)
(only F- strains require a nutritional supplement in their growth media)
(only F+ strains can be infected by bacteriophage)
(only F+ strains contain an F factor)
A growth medium that contains only the essential nutrients required for the growth of a
wild-type bacterial species is called a (n) ______ medium.
minimal
What is an auxotroph?
(a bacterial strain that can grow on minimal media that contains only essential nutrients)
(a bacterial strain that cannot be infected by viruses)
(a bacterial strain that required a certain nutrient to be supplemented in its growth
medium)
(a bacterial strain that required a certain nutrient to be supplemented in its growth medium)
A bacterial strain that can synthesize a nutrient (e.g., methionine) and does not require that
nutrient in its growth medium is called a (n) _________.
prototroph
