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EXAM 1: MCB2610 Exam 1|173+ Questions and Answers 100% Pass

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EXAM 1: MCB2610 Exam 1|173+ Questions and Answers 100% Pass what is microbiology? CORRECT ANS-study of microbes -examines how microbes interact with humans, with food, and how they can be used by humans microbes CORRECT ANS-forms of life that are too small to be seen with the naked eye -bac...

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  • September 3, 2024
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EXAM 1: MCB2610 Exam 1|173+ Questions and Answers
100% Pass
what is microbiology? CORRECT ANS-study of microbes


-examines how microbes interact with humans, with food, and how they can be used by

humans




microbes CORRECT ANS-forms of life that are too small to be seen with the naked eye


-bacteria


-algae


-protists




prokaryotic cells CORRECT ANS-lack a true membrane-delimited nucleus


-not absolute




eukaryotic cells CORRECT ANS-have a membrane-enclosed nucleus, are more complex

morphologically (membrane-enclose organelles


-usually larger than prokaryotic cells




5 kingdom system CORRECT ANS-animalia

,EXAM 1: MCB2610 Exam 1|173+ Questions and Answers
100% Pass
plantae


fungi


monera


protista




Aristotle's two groups (classification schemes CORRECT ANS-plants and animals




three domain system (1990) CORRECT ANS-developed due to advances in electron

microscopy, biochemistry and physiology, and ability to determine nucleic acids and protein

sequences




Carl Woese (1990) divides microorganisms into 3 categories CORRECT ANS--bacteria (true

bacteria)


-archaea


-eukarya (eukaryotes)




domain bacteria CORRECT ANS--usually single-celled

,EXAM 1: MCB2610 Exam 1|173+ Questions and Answers
100% Pass
-majority have cell walls with peptidoglycan


-most lack a membrane-bound nucleus


-ubiquitous and some live in extreme environments


-some cause disease but most are beneficial


-many recycle elements (ex= cyanobacteria produce amounts of significant oxygen)




domain archaea CORRECT ANS--distinguished from bacteria by unique rRNA sequences


-lack peptidoglycan in cell walls and have unique membrane lipids


-some have unusual metabolic characteristics (ex: methanogens produce methane gas)


-many live in extreme environments


-their role in causing diseases is unclear




domain eukarya- eukaryotes CORRECT ANS--generally larger than bacteria and archaea


-plants and animals


-algae-photosynthetic


-protozoa: may be motile


-slime molds: two life cycle stages

, EXAM 1: MCB2610 Exam 1|173+ Questions and Answers
100% Pass
-water molds: protists that grow in moist environments (some cause devastating diseases in

plants)


-fungi: yeasts, unicellular molds, and multicellular (primarily decomposers, some cause

disease




are acellular infectious agents considered part of the 3 domain system of classification?

CORRECT ANS-NO




types of acellular infectious agents CORRECT ANS--viruses


-viriods


-virusoids


-prions: infectious proteins




viruses CORRECT ANS--smallest of all microbes


-very simple (some consist of only proteins and nucleic acids


-requires host cell to replicate


-causes range of diseases, some cancers

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