MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

Diagnostic DNA probes have been developed for

Mycobacterium tuberculosis

Human immunodeficiency virus

Hepatitis B virus

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Conjugative plasmids

None of these

Non-conjugative plasmids

Cryptic plasmids

TRUE ANSWER : ?
YOUR ANSWER : ?

R factors involved in plant-microbe interactions are

bacterial proteins

plant proteins

also called opines

essential for transfer of DNA to plant cells

TRUE ANSWER : ?
YOUR ANSWER : ?

The plasmid-mediated properties is/are

production of enterotoxin

fermentation of lactose

all of these

resistance to antibiotics

TRUE ANSWER : ?
YOUR ANSWER : ?

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

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

DNA is transferred from F+ to F- cells

DNA is transferred from F- to F+ cells

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 : ?

Penicillin resistance in staphylococci is acquired due to

mutation

conjugation

transduction

transformation

TRUE ANSWER : ?
YOUR ANSWER : ?

The main difference between a self-transmissible and a mobilizable plasmid is that the self-transmissible plasmid

transfers both strands of the plasmid DNA

transfers antibiotic resistance genes

carries genes encoding the mating apparatus

usually has a transposon inserted into it

TRUE ANSWER : ?
YOUR ANSWER : ?

The correct term for the transfer of genetic material between bacteria in direct physical contact is

replication

conjugation

transformation

transduction

TRUE ANSWER : ?
YOUR ANSWER : ?

Inverted repeat sequences at each end and a gene encoding transposase is contained in which of the following transposable element?

Insertion element

Virus

Composite transposon

Plasmid

TRUE ANSWER : ?
YOUR ANSWER : ?

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