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Bacteriology Exam 1 questions & correct answers
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Bacteriology Exam 1 questions & correct answers
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Bacteriology Exam 1 questions &correct answers
microbes/microorganisms - correct answer ✔✔living things too small to be seen with the unaided eye
includes bacteria, fungi, protozoa, and microscopic algae
2 names each organism has - correct answer ✔✔genus and species
Bacteria - correct answer ✔✔-prokaryotes- no nucleus or other membrane-bound internal organelles
-single-celled
-peptidoglycan cell walls
-divide via binary fission
-derive nutrition from organic to inorganic, chemicals, or photosynthesis
Archaea - correct answer ✔✔-prokaryotes
-lack peptidoglycan cell walls
-often live in extreme environments
-include: methanogens, extreme halophiles, extreme thermophiles
Fungi - correct answer ✔✔-eukaryotes
-chitin cell walls
-absorb organic chemicals for energy
-yeasts are unicellular
-molds and mushrooms are multicellular
-molds contain masses of mycelia, composed of filaments called hyphae
Protozoa - correct answer ✔✔-eukaryotes
, -absorb or ingest organic materials
-mobile via flagella, cilia, pseudopods
-free-living or parasitic (nutrients from living host)
Algae - correct answer ✔✔-eukaryotes
-cellulose cell walls
-found in freshwater, saltwater, and soil
-photosynthesis for energy
-produce oxygen and carbphydrates
Viruses - correct answer ✔✔-acellular
-DNA or RNA core
-core surrounded by protein coat
-coat enclosed in lipid envelope
-replicated only when in living host cell
-insert outside living hosts
-non-living
Spontaneous Generation - correct answer ✔✔the hypothesis that life arises from nonliving matter; a
"vital force" is necessary for life
Biogenesis - correct answer ✔✔the hypothesis that living cells arise only from preexisting living cells
Louis Pasteur - correct answer ✔✔-microbes are responsible for fermentation
-responsible for spoilage of food and beverages
-these bacteria could be killed by heat
-germ theory of disease
Fermentation - correct answer ✔✔microbial conversion of sugar to alcohol in the absence of air
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