MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

The chromosomal genes, possessing fertility factor is known as

HFr

R factor

F factor

F prime factor

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

metabolic plasmid

none of these

virulence plasmid

F factors

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Which type of plasmid can exist with or without being integrated into the host's chromosome?

Medisome

Lisosome

Episome

Lysogen

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Which of the following type of recombination does not require homologous sequences and is utilized by mobile genetic elements that move about chromosomes?

Mutagenic recombimation

General recombination

Site-specific recombination

Replicative recombination

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Which of the following statement describes plasmids?

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

A complex membrane structure that covers the chromosome of bacteria

Another name for a protoplast

None of these

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What is term used for a bacterial cell that is able to take up naked DNA?

Competent

Liable

Complementary

Infected

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The type of recombination that commonly occurs between a pair of homologous DNA sequences is,

site-specific recombination

replicative recombination

general recombination

mutagenic recombination

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In lysogeny,

a bacteriophage genome is integrated into the bacterial genome

bacteria take up double stranded DNA from the environment

a bacteriophage transfers bacterial DNA

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

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The plasmid-mediated properties is/are

fermentation of lactose

resistance to antibiotics

all of these

production of enterotoxin

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Which of the following is the cause for drug resistance in tuberculosis?

Conjugation

Transformation

Mutation

Transduction

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