introduction to diagnostic microbiology for the la
introduction to diagnostic microbiology 2nd
introduction to diagnostic microbiology delost
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TEST BANK for Introduction to Diagnostic Microbiology for the Laboratory Sciences 2nd Edition By Maria Dannessa Delost | Verified Chapter's 1 - 24 | Complete Newest Version
TEST BANK - Delost, Introduction to Diagnostic Microbiology for the Laboratory Sciences. 2nd Edition, All 24 Chapters Covered, Verified Latest Edition
Introduction to Diagnostic Microbiology for the Laboratory Sciences 2nd Edition By Maria Dannessa Delost
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TEST BANK for Introduction to Diagnostic Microbiology for the
Laboratory Sciences 2nd Edition By Maria Dannessa Delost
The peptidoglycan layer in the Gram negative cell wall is - ANSWER:thin
Bacterial plasmids - ANSWER:carry virulence related genes
do not have housekeeping genes
are circular DNA molecules
Pilli are present in gram positive bacteria only, while flagella are present in Gram
negative bacteria only - ANSWER:false
The F plasmids in bacteria have an essential role in - ANSWER:initiating bacterial
conjugation
The duplication of a DNA molecule in bacteria always starts at the position called -
ANSWER:origin of replication
replication fork
HIV is NOT diagnosed by - ANSWER:cell culture
Sterilisation is - ANSWER:Is the killing or removal of all viable organisms - bacteria
spores and viruses
Which is not a physical factor used in Sterilization - ANSWER:disinfection
Genetic transformation in microbes - ANSWER:can be demonstrated in infected
laboratory animals such as mice
is easier in competent cells
can occur when a bacteriophage infects a bacterial cell
occurs when DNA is incorporated into a recipient cell and leads to genetic changes
Microbial transduction - ANSWER:is the packaging of bacterial DNA inside a newly
formed bacteriophage molecule
A segment of DNA that can move from one site to another on the same or a different
DNA molecule is called - ANSWER:transposable element
Bacterial endotoxins are - ANSWER:cellular components released upon cell lysis
Integral membrane proteins are - ANSWER:firmly embedded in the cytoplasmic
membranes of bacterial cells
, The prokaryotic ABC transport system - ANSWER:is not a simple transport system
requires energy in the form of ATP molecules
is often involved in the uptake of organic compounds and inorganic nutrients
displays high substrate specificity
5-Bromouracil is - ANSWER:a nucleotide base analogue
A microbial cell can contain more than one plasmid, but they must be -
ANSWER:from different incompatibility groups
Most areas of skin including sweat glands are colonised with Gram negative bacteria
- ANSWER:False
the skin is colonised mostly with G+ve bacteria
The lower respiratory tract lacks microflora in healthy individuals - ANSWER:true
E. coli and P. mirabilis frequently cause - ANSWER:urinary tract infections in women
Invasiveness - ANSWER:Can cause damage without producing a toxin
is the ability of a pathogen to grow in host tissue at densities that inhibit host
function
Staphylococcal alpha toxin has both cytolytic and hemolytic activities - ANSWER:true
this toxin kills nucleated cells and also lyses erythrocytes
Supercoiling is important for DNA structure, because - ANSWER:it condenses the
DNA so that it can fit inside the cell
Which of the following statements is INCORRECT regarding mutations in bacterial
cells? - ANSWER:Mutations are NOT immediately expressed because the bacterial
cell is diploid
The most critical step in the use of 16Sr RNA sequence data in phylogenetic studies is
- ANSWER:Matching the gene sequence to the sequences in the reference data bank
In bacterial cytoplasmic membranes - ANSWER:hydrophilic portions remain exposed
to external environment or to cytoplasm
fatty acids point inward to form a hydrophobic environment
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