MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

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

None of these

Conjugative plasmids

Non-conjugative plasmids

Cryptic plasmids

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?

Replicative recombination

Mutagenic recombimation

Site-specific recombination

General recombination

TRUE ANSWER : ?
YOUR ANSWER : ?

The chromosomal genes, possessing fertility factor is known as

F prime factor

HFr

F factor

R factor

TRUE ANSWER : ?
YOUR ANSWER : ?

Plasmid that carries genes encoding enzymes, which degrade substances such as aromatic compounds, pesticides or sugar are

F factors

metabolic plasmid

none of these

virulence plasmid

TRUE ANSWER : ?
YOUR ANSWER : ?

In the extracellular medium, DNA-degrading enzymes would likely be to prevent transfer of DNA by

generalized phage transduction

None of these

conjugal transfer by a self-transmissible plasmid

natural transformation

TRUE ANSWER : ?
YOUR ANSWER : ?

When composite transposons are formed

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 and plasmid is integrated

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

TRUE ANSWER : ?
YOUR ANSWER : ?

R factors involved in plant-microbe interactions are

essential for transfer of DNA to plant cells

bacterial proteins

also called opines

plant proteins

TRUE ANSWER : ?
YOUR ANSWER : ?

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

DNA is transferred from F+ to F- cells

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

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 genetic elements carry the genes required for integration into host chromosomes?

Tandons

Plasmids

Replicon

Transposons

TRUE ANSWER : ?
YOUR ANSWER : ?

Who discovered transposons (jumping genes)?

McClintock

Abelson

Harvey

Griffith

TRUE ANSWER : ?
YOUR ANSWER : ?