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46 Cards in this Set

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Microorganisms require large quantities of this nutrient for use in cell structure.
macronutrient. Microorganisms that require small quantities of this nutrient for enzyme function and maintenance of protein structure are trace elements.
An organic nutrient that cannot be synthesized by the organisms and must be provided is called a....
growth factor
An important mineral ion of the cytochrome pigments of cellular respiration is.....
iron
An important mineral ion that is a component of chloroplasts and stabilizer of membranes and ribosomes is...
magnesium
The term phototroph refers to an organism that...
gets energy from sunlight
The term autotroph refers to an organism that...
uses CO2 for its carbon source
The term heterotroph refers to an organism that
must obtain organic compounds for its carbon needs.
The term chemotroph refers to an organism that...
gets energy by oxidizing chemical compounds
The methanogens, producers of methane gas, require environments that....
are anerobic with H2 gas and CO2.
Organisms that feed on dead organisms for nutrients are called...
saprobes
The type of photosynthesis that does not produce oxygen...
occurs in purple and green sulfur bacteria
Diffusion is the movement of molecules from an area of high to an area of low concentration. TRUE/FALSE
TRUE.
What is active transport?
It is the movement of substances from lower to higher concentration across a semipermeable membrane that must have a specific protein carrier and cell expenditure of energy.
What is facilitated diffusion?
It is the movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure.
The use of energy by a cell to enclose a substance in its membrane by forming a vacuole and engulfing it is called endocytosis. TRUE/FALSE
TRUE.
Give an example of an organism that would find hypotonic conditions most detrimental.
protozoa
Endocytosis requires the cell to use ATP. TRUE/FALSE
TRUE
Contractile vacuoles are...
used to expel excess water from cells
A psychrophile will grow below 37C. TRUE?FALSE
TRUE
A microorganism that has an optimum growth temperature of 37C, but can survive short exposure to high temperatures is calleda....
thermoduric
An organism that grows slowly in the cold but has an optimum growth temperature of 32C is called a...
facultative psychrophile
What is a thermophile?
It is an organism with a temperature growth range of 45C to 60C.
List 4 organisms that could find a location in or on body tissues suitable for growth...
mesophiles/facultative anaerobes/capnophiles
A microorganism that does not have catalase or superoxide dismutase would find it difficult to live in an environment with...
oxygen
What is a microaerophile?
An organism that requires a small amount of O2 but wont grow at normal atmospheric level
A halophile grows best in...
salt lakes
The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a ________ relationship.
mutualistic
The term interval from parent cell to 2 new daughter cells is called the....
generation time
The phase of the bacterial growth curve in which the rate of multiplication equals the rate of cell death is the....
stationary phase
What is the lag phase?
It is the phase of the bacterial growth curve in which newly inoculated cells are adjusting to their new environment, metabolizing but not growing.
Archaea as a group are not pathogens. This is because...
Mammalian hosts do not meet their environmental requirements.
Calcium is required by bacteria because...
it stabilizes the cell wall
Growth factors cannot be synthesized by the organism. TRUE/FALSE
TRUE.
bacteriochlorophyll...
is found in purple sulfur bacteria
Aerobic respiration is an example of...
chemoheterotrophy
Nutrient absorption is mediated by the...
cell membrane
Halobacteria regulate osmotic pressure by...
absorbing salt from the environment
Facilitated diffusion is limited by...
carrier proteins in the membrane
Mesophiles are human pathogenic organisms. TRUE/FALSE
TRUE.
An organism that uses CO2 for its carbon needs would be called a...
photoautotroph
The toxic superoxide ion is converted to harmless O2 by two enzymes;_______and________.
catalase/superoxide dismutase
Phosphorous is a major element needed by microorganisms. TRUE/FALSE
TRUE
Lithoautotrophs use inorganic nutrients for carbon and energy sources. TRUE/FALSE
TRUE
In a commensal relationship, the commensal benefits but the cohabitant is neither harmed nor benefitted. TRUE/FALSE
TRUE
A closed culture system is used to determine a population growth curve. TRUE/FALSE
TRUE
The degree of turbidity in a culture correlates to the amount of cell growth. TRUE/FALSE
TRUE.