Brock Biology of Microorganisms Chapter 1 Exam Questions With Correct Answers
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Brock Biology of Microorganisms
Institution
Brock Biology Of Microorganisms
Brock Biology of Microorganisms Chapter 1
Exam Questions With Correct Answers
Culture - answercells grown in/on nutrient medium
medium - answerliquid/solid mixture containing all required nutrients
cell - answerliving compartment that interacts with the environment and other cells
cytoplasmic ...
plasmids - answer✔extrachromosomal DNA that confers special properties (like antibiotic
resistance) (found in prokaryotes)
metabolism - answer✔the chemical transformation of nutrients
enzymes - answer✔protein catalysts
transcription - answer✔when DNA information is converted into RNA
translation - answer✔when RNA is used by ribosome to make protein
motility - answer✔when cells move by self-propulsion
differentiation - answer✔when microbes modify internal structures to form specialized cells
intercellular communication - answer✔when microbes respond to other microbes
activities of microbial cells - answer✔-metabolism
-motility
-differentiation
-intercellular communication
-evolution
-live in microbial communities
3.8-4.3 billion y.a. - answer✔When did the first cells appear on Earth?
~2.6 billion y.a. - answer✔When was O2 introduced to the Earth's atmosphere?
~3.6 billion y.a. - answer✔When did the first anoxygenic phototrophs appear?
~0.5 billion y.a. - answer✔When did plants and animals appear on Earth?
three domains (distinct lineages of microbial cells - answer✔-Bacteria (prok)
-Archaea (prok)
-Eukarya (euk)
LUCA - answer✔last universal common ancestor
extremophiles - answer✔organisms that live in habitats too harsh for other life forms (ex. hot
springs, glaciers, high salt, acidity, alkalinity, pressure)
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