MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

Which of the following statement(s) is/are true in regards to F+ x F- mating events?

No DNA is transferred because F+ cells are unable to perform conjugation

DNA is transferred from F- to F+ cells

No DNA is transferred because F- cells are unable to perform conjugation

DNA is transferred from F+ to F- cells

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following type of recombination does not require homologous sequences and is important for the integration of viral genomes into bacterial chromosomes?

Site-specific recombination

General recombination

Replicative recombination

Mutagenic recombimation

TRUE ANSWER : ?
YOUR ANSWER : ?

In lysogeny,

bacteria take up double stranded DNA from the environment

a bacteriophage genome is integrated into the bacterial genome

a bacteriophage transfers bacterial DNA

DNA-degrading enzymes in the extracellular medium would stop the process

TRUE ANSWER : ?
YOUR ANSWER : ?

The transposase gene encodes an enzyme that facilitate

general recombination

viral replication within a genome

None of these

site-specific integration of transposable elements

TRUE ANSWER : ?
YOUR ANSWER : ?

F factor plasmids play a major role in

transduction

trasnscription

replication

conjugation

TRUE ANSWER : ?
YOUR ANSWER : ?

Recombination of virus genomes occurs

by transduction

by transription

by transformation

simultaneous infection of a host cell by two viruses with homologous chromosomes

TRUE ANSWER : ?
YOUR ANSWER : ?

When composite transposons are formed

an IS element integrates with another IS element with the help of a plasmid

a small deletion occurs in the transposase gene of an IS element and plasmid is integrated

two IS elements integrate into a chromosome with only a small distance separating them

a small deletion occurs in the transposase gene of an IS element

TRUE ANSWER : ?
YOUR ANSWER : ?

The chromosomal genes, possessing fertility factor is known as

F factor

F prime factor

R factor

HFr

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following plamids do not possess information for self transfer to another cell?

Conjugative plasmids

Cryptic plasmids

None of these

Non-conjugative plasmids

TRUE ANSWER : ?
YOUR ANSWER : ?

Penicillin resistance in staphylococci is acquired due to

mutation

transformation

conjugation

transduction

TRUE ANSWER : ?
YOUR ANSWER : ?

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