MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

The expression of gene X (which has promoter Px) is to be monitored. A gene fusion construction for carrying this work will

have the promoter of lacZ or some other reporter gene

give the same information as from a microarray

allow to monitor the expression of all genes with a promoter similar in sequence to Px

have Px but not the rest of the X coding region

TRUE ANSWER : ?
YOUR ANSWER : ?

Diagnostic DNA probes have been developed for

All of these

Human immunodeficiency virus

Hepatitis B virus

Mycobacterium tuberculosis

TRUE ANSWER : ?
YOUR ANSWER : ?

The transposase gene encodes an enzyme that facilitate

general recombination

None of these

site-specific integration of transposable elements

viral replication within a genome

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Medisome

Episome

Lisosome

Lysogen

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

Plasmid

Composite transposon

TRUE ANSWER : ?
YOUR ANSWER : ?

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

carries genes encoding the mating apparatus

transfers both strands of the plasmid DNA

usually has a transposon inserted into it

transfers antibiotic resistance genes

TRUE ANSWER : ?
YOUR ANSWER : ?

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 statement describes plasmids?

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

None of these

Another name for a protoplast

A complex membrane structure that covers the chromosome of bacteria

TRUE ANSWER : ?
YOUR ANSWER : ?

The plasmid-mediated properties is/are

fermentation of lactose

resistance to antibiotics

all of these

production of enterotoxin

TRUE ANSWER : ?
YOUR ANSWER : ?

Recombination of virus genomes occurs

by transduction

by transription

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

by transformation

TRUE ANSWER : ?
YOUR ANSWER : ?

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