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The idea od spontaneous generation postulated that
living organisms could spontaneously arise from non-living material.
multiply by binary fission, do not comntain a true nucleous, prokaryotic, rigid cell wall, single cell, peptidoglycan
Although it is said that the 20th century was the Age of Physics, it is predicted that the twenty-first century will be the age of
Amino Acids in proteins are linked to one another by peptide bonds between the
carboxyl group of one amino acid and amino group of another.
Protein denaturation can
occur due to certain chemicals, pH change, high temperatures, cause protein to no longer fxn.
signaling molecules, part of enzymes, carry chemical energy in bonds, DNA building blocks.
In viewing a microscopic specimen, oil is used to
decrease the refraction and increase the resolution.
Which may result in Gram + bacteria appearing to be Gram - ?
Decolorizing too long and using old cultures.
The major criteria used in placing bacterua into different groups is based on differences in
cell wall structure.
uses fluorescently tagged molecules, makes use of the specificity in binding of antibodies, requires a UV microscope.
Which is true of simple diffusion of water?
H20 enters cell, produces osmotic pressure, relies on selectively permeable nature of cell membrane.
Which is true concerning the cell wall prokaryotes?
determines the shape, prevents from bursting, contains peptidoglycan, targeted by antimicrobials.
Which molecules are associated with the cell wall of Gram +?
Peptidoglycan, D-form amino acid, teichoic acids.
All the bacterial cells that result from the replication of a single organism are said to be a
The simplest technique for isolationg bacteria in growth media is referred to as the
streak plate method
In the growth curve of a bacteria population, the bacteria are rapidly increasing in number in the
A medium that enhances the growth of one perticular organism in a mixed population is termed
The process of killing or removing all the microorganisms in or on a material is termed
Plain soap is very effective in controlling spread of microorganisms because it is
effective at the mechanical removal of microorganisms.
To reduce or eliminate disease/spoilage causing organisms, food is often subjected to
heat, chemical additives, radiation, cold.
Ethylene oxide is gas that
useful in sterilizing heat or moisture sensitive items, potentially carcinogenic.
Which is true of iodine?
Does not readily kill endospores, used as an antiseptic, found as tinctures or iodophors.
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