Deck 20: Plasmids

Question 1

The Ti-plasmid is found in .

A)Escherichia coli
B)yeast
C)Agrobacterium tumefaciens
D)plants

Answer 1

C

Question 2

Which family of plasmids carries genes for antibiotic resistance?

A)R-plasmids
B)F-plasmids
C)P-plasmids
D)X-plasmids

Answer 2

A

Question 3

Which one of the following organisms does not have plasmids?

A)bacteria
B)viruses
C)yeast
D)archaea

Answer 3

B

Question 4

Bidirectional replication for F-plasmids occurs at the .

A)origin of vegetative replication
B)origin of transfer
C)origin of chromosomal replication
D)linear ends

Question 5

Rolling circle replication .

A)begins when the origin of replication is pulled apart to generate a replication bubble
B)occurs at the origin of vegetative replication
C)begins when the origin of replication is nicked and one strand is unrolled
D)occurs when a plasmid replicates in step with host cell division

Question 6

Plasmids are self-replicating extrachromosomal pieces of DNA.

Question 7

All plasmids are circular

Question 8

Transferable plasmids use as a form of replication during transfer.

A)bidirectional replication
B)rolling circle replication
C)conservative
D)none of the above

Question 9

Plasmids in the same family are incompatible because .

A)they are transferable
B)they produce toxins
C)they carry genes for antibiotic resistance
D)they have similar DNA sequences in the replication genes

Question 10

Which of the following might be plasmid-encoded?

A)toxins
B)antibiotic resistance
C)plant hormones
D)all of the above

Question 11

The Ti-plasmid was used as the platform for genetically engineering plants.