MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

Penicillin resistance in staphylococci is acquired due to

conjugation

transformation

transduction

mutation

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Which of the following statement describes plasmids?

None of these

A complex membrane structure that covers the chromosome of bacteria

Another name for a protoplast

Small, circular DNA molecules that can exist independently of chromosomes commonly found in bacteria

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Which of the following term describes the relationship between a virus and host where no new viral particles are produced and the viral genome is replicated along with host chromosome?

Lysogeny

Conjugation

Transformation

Lysis

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What is the term used for a segment of DNA with one or more genes in the centre and the two ends carrying inverted repeat sequences of nucleotides?

None of these

Insertion sequence

Plasmid

Transposon

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A microarray differs from a gene fusion in that, it

carries DNA segments from many different genes

All of these

gives direct measurement of mRNA level

is not constructed by cloning

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

Virus

Plasmid

Composite transposon

Insertion element

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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

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In lysogeny,

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

bacteria take up double stranded DNA from the environment

a bacteriophage transfers bacterial DNA

a bacteriophage genome is integrated into the bacterial genome

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The plasmid which makes the host more pathogenic is

Metabolic plasmid

Virulence plasmid

F factors

None of these

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The chromosomal genes, possessing fertility factor is known as

R factor

F prime factor

HFr

F factor

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