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MBY 161 Theme 1 Exam Questions And Correct Answers
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MBY 161 Theme 1 Exam Questions AndCorrect Answers
Define a microorganism - Answer Minute living things that individually are usually too
small to be seen with the unaided eyes. Also called micorbes.
Identify the system of scientific nomenclature that uses a genus and specific epithet. -
Answer *The genus is the first name and is always capitalized.
*The specific epithet (species name) follows and is not capitalized.
Bacteria - Answer *Prokaryotes (Unicellular)
*Peptidoglycan cell walls (carbohydrate and protein complex)
*Flagella
Divide into 2 equal cells binary fusion
Nutrition: Organic and Inorganic substances
Several shapes:
-Bacillus = rodlike
-Coccus = spherical/ ovoid
-Spiral = corckscrew/ curved
Form pairs, chains, clusters, etc.
Archae-Answer *Prokaryotes
*Cell walls lack peptidoglycan
*Extreme environments
*Methanogens = produce methane as waste product from respiration
*Extreme halophiles = live in extremely salty environments
*Extreme Thermophiles = Live in hot sulfurous water
, *Not known to cause disease
Viruses-Answer *Acellular
*Most only visible under electron microscope
Core composed of either DNA/RNA
Perform chemical reactions
Reproduce independent units
Reproduce by using the cellular apparatus of other organisms.
Living = when reproducing in host cell
Non-living = inactive outside living host
Fungi - Solution *Eukaryotes
*Has separate nucleus containing DNA
*Nuclear membrane
*Unicellular/ Multicellular
*Cant photosynthesize
*Cell walls are composed of chitin
*Yeast = elliptical unicellular organisms
*Mycelia = observable masses of molds consisting of long filaments (Hyphae) that branch
& intertwine
*Mycelia = growths found on bread and fruit
*Reproduce sexually / asexually
*Absorb organic material
*Slime molds = Fungi + Amebae
Protozoa - Answer *Unicellular eukaryotes
*Move by:
-Pseudopods (false feet)
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