Mutations
A mutation from the most prevalent form of a gene to a mutant form is called a __________ mutation.
forward
The process by which two cells arise from one is known as
binary fission
A chemical that denatures proteins is MOST likely to be classified as a(n) ________ agent.
bacteriocidal
The member of the domain Bacteria whose genome shows it to be most closely related to the Archaea is
Thermotoga
Are Rickettsias bacteria??
Rickettsias are small obligate intracellular parasites and are therefore, more properly classified as viruses.
Spontaneous mutations are caused by
errors in DNA replication
The time between inoculation and the beginning of growth is usually called the
lag phase
An antiseptic (or germicide) is distinguished from other sterilizing compounds by
being able to be used on living tissues without harm
Members of the phylum Thermotogae can be found growing in
marine hydrothermal vents and terrestrial solfataric hot springs.
Whooping cough is caused by
Bordetella pertussis.
A __________ mutation does not alter the amino acid sequence of the resulting protein
silent
Bacteria that are able to grow in humans and cause disease have likely evolved to be
mesophiles
Can some microbes grow in boiling water?
Yes
How can deinococci resist radiation?
due in part to an unusual ability to repair chromosome damage, even fragmentation.
Coxiella burnetii reproduces in the ______________ of a eukaryotic host cell.
phagolysosome
As the result of exposure to a mutagen, cytosine is substituted for thymine in one strand of DNA. Upon subsequent DNA replication, one of the daughter cells will have a GC pair in this position instead of an AT pair. This is called a(n) __________ mutation.
transition
Most mesophilic organisms can grow in a temperature range of
20-40°C
How does an auto clave work?
uses steam under pressure
How does green surfer bacteria control their depth?
by using gas vesicles to control buoyancy
The largest group of proteobacteria are the
gamma proteobacteria
__________ are physical or chemical agents that cause mutation.
Mutagens
A microbe growing in a refrigerator is likely (in terms of temperature)
) psychrotolerant or psychrophilic.
How is the sterility of a laminar flow hood accomplished?
filter-sterilized air passed through the hood quickly enough that non-sterile air does not flow into the work area.
The process of conversion of ammonia to nitrate is referred to as
nitrification
What organism causes the plague?
Yersinia pestis