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WGU C453 Microbiology Module 1 – Questions & Accurate Answers (100%)
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WGU C453 Microbiology Module 1 – Questions & Accurate Answers (100%)
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WGU C453 Microbiology Module 1 – Questions &Accurate Answers (100%)
Endocytosis Right Ans - the taking in of matter by a living cell by
invagination (poking in) of its membrane to form a vacuole.
Osmosis Right Ans - diffusion of water across a selectively permeable
membrane
Exocytosis Right Ans - a process by which the contents of a cell vacuole are
released to the exterior through fusion of the vacuole membrane with the cell
membrane.
Pleomorphism Right Ans - variations in size and shape among cells of a
single species
Lysozyme Right Ans - an enzyme found in saliva and sweat and tears that
destroys the cell walls of certain bacteria
inclusion bodies Right Ans - granules of storage material such as sulfur that
accumulate within some bacterial cells
Cytoplasm Right Ans - A jellylike fluid inside the cell in which the
organelles are suspended. about four-fifths water and one-fifth substances
dissolved or suspended in the water, including enzymes and other proteins,
carbohydrates, lipids, and a variety of inorganic ions. Many chemical
reactions, both anabolic and catabolic, occur in the cytoplasm.
Nucleoid Right Ans - A non-membrane-bounded region in a prokaryotic
cell where the DNA is concentrated.
Plasmid Right Ans - A small ring of DNA that carries accessory genes
separate from those of the bacterial chromosome. May contain resistance
genes that cause abx resistance.
microbial growth Right Ans - increase in number of cells, not cell size
, binary fission Right Ans - type of asexual reproduction in which an
organism replicates its DNA and divides in half, producing two identical
daughter cells
Budding Right Ans - A form of asexual reproduction of yeast in which a
new cell grows out of the body of a parent.
lag phase Right Ans - A short period of time **prior to exponential growth
of a bacterial population during which no, or very limited, cell division occurs.
log phase Right Ans - The period of exponential growth of bacterial
population.
stationary phase Right Ans - rate of cell growth equals rate of cell death
caused by depleted nutrients and O2, excretion of organic acids and pollutants
Decline phase Right Ans - o Period of massive death, the population all dies
off or some form protective spores
colony of bacteria Right Ans - A cluster of cells or clone which arises from a
single bacterium by asexual reproduction
Acidophiles Right Ans - grow in acidic environments 0.1-5.4
Neutrophiles Right Ans - Neutrophiles exist from pH 5.4 to 8.0. Most of the
bacteria that cause disease in humans are neutrophiles.
Alkaliphiles Right Ans - organisms that live above pH 8.5
Halophiles (halobacteria) Right Ans - Anaerobic bacteria that thrive in
environments with very high salt concentrations
endospores Right Ans - A thick-walled protective spore that forms inside a
bacterial cell and resists harsh conditions.
bacterial capsule Right Ans - Sticky layer on some bacteria that allows it to
adhere to surfaces making it difficult to eradicate. Many disease-causing
bacteria have capsules.
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