growth factor
An organic nutrient that cannot be synthesized by the organisms and must be provided is called a
Iron
An important mineral ion of the cytochrome pigments of cellular respiration is
Magnesium
An important mineral ion that is a component of chloroplasts and stabilizer of membranes and ribosomes is
Organic compounds
Most of the dry weight of a microbial cell is from
Copper
What is NOT a major element of a microbial cell?
uses CO2 or its carbon source
The term autotroph refers to an organisms that
gets energy from sunlight
The term heterotroph refers to an organism that
it stabilizes the cell wall
Calcium is required for bacteria because
cannot be synthesized by the organism
Growth factors
occurs in purple and green sulfur bacteria
The type of photosynthesis that does not produce oygen
Mammalian hosts do not meet their environmental requirements
Archea as a group are not pathogens because
chemoheterotrophy
Aerobic respiration is an example of
gets energy by oxidizing chemical compounds
The term chemotroph refers to an organism that
are anaerobic with hydrogen gas and CO2
The methanogens, producers of methane gas, require environments that
saprobes
Organisms that feed on dead organisms for nutrients are called
existing in a very narrow niche
Obligate
ability to exist in a wide range o fconditions
Facultative
shrivel
Bacteria living in a freshwater stream that are moved to salty seawater would
would find hypotonic condition very detrimental
Protozoa
require the cell to use ATP
Endocytosis
used to expel excess water from cells
Contractile vacuoles
cell membrane
Nutrient absorption is mediated by the
absorbing salt from the environment
Halo bacteria regulate osmotic pressure by
protein carrier
Mediated transport of polar molecules and ions across the plasma membrane utilizes a _____ _______ that will bind to the substance effecting a conformational change that allows movement across the membrane.
facultative anaerobe
Cultures of a bacterial species were incubated out on the shelf…this species is called…
facultative psychrophile
An organism that grows slowly in the cold but has an optimum growth temperature of 32 C is called
psychrophile
Cultures of a bacterial species were incubated on the shelf of a refrigerator…this species is
mesophiles
Human pathogens fall into the group
Psychrophiles
_________could not find a location in or on body tissues suitable for growth
oxygen
A microorganism that does not have catalase or super oxide dismutase would find it difficult to live in an environment with
obligate aerobe
An organism that cannot grow without oxygen is a
thioglycollate
What type of media is used to demonstrate oxygen requirements of microbes?
salt lakes
A halophile would grow best in
facultative anaerobe
An organism that can exist in both oxygen and oxygen less environments is a
obligate anaerobe
An organism that cannot tolerate an oxygen environment is a
the deep oceans
A barophile would grow best in
antibiosis
The production of antibodies is a form of antagonism called
commensalism
When microbes in close nutritional relationship and one benefits but the other is not harmed, it is called
coevolution
A change in one partner in a close relationship that leads to a change in the other partner is
flow cytometer
When it is important to count the number of cells, determine cell size and differentiation between dead and live cells, a _______ is used.
stationary phase
The phase of the bacterial growth curve in which the rate of multiplication equals the rate of cell death is the
