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MCB 2610 Questions with complete solution 2024/2025
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MCB 2610 Questions with complete solution 2024/2025 MCB 2610 - Exam 1 microbiology - correct answer the study of microbes microbes - correct answer forms of life too small to be seen with the naked eye prokaryotic cell - correct answer lack a true membrane delimited nucleus; no mem...

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  • October 17, 2024
  • 12
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • mcb 2610
  • mcb 2610 questions with complete solution 202420

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MCB 2610 - Exam 1
microbiology - correct answer ✔the study of microbes


microbes - correct answer ✔forms of life too small to be seen with the naked
eye


prokaryotic cell - correct answer ✔lack a true membrane delimited nucleus;
no membrane bound organelles


eukaryotic cells - correct answer ✔have a membrane enclosed nucleus,
more complex morphologically, and are usually larger of the two types


Carl Woese - correct answer ✔developed the modern three classification
system based on analysis of small subunit (SSU) ribosomal RNA


Bacteria, Archaea, Eukarya - correct answer ✔the three domains used to
classify microorganisms


Bacteria - correct answer ✔usually single-celled; 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


Archaea - correct answer ✔unique rRNA sequences; lack peptidoglycan in
cell walls and have unique membrane lipids; some have unusual metabolic
characteristics; many live in extreme environments; their role in causing
diseases is unknown

, Eukarya - correct answer ✔plants, animals, algae, protozoa, slime-molds,
water molds, fungi


viruses - correct answer ✔smallest of all microbes; very simple - consist of
only proteins and nucleic acids; requires a host cell to replicate; cause a range
of disease, even cancers


viroids (virusoids) - correct answer ✔infectious agents composed of RNA


prions - correct answer ✔infectious proteins


micelle - correct answer ✔single lipid layer which may have been an early
form of a plasma membrane


endosymbiotic theory - correct answer ✔theory that primitive prokaryotic
microbes ingested other other microbes, starting a symbiotic relationship,
forming the first basic eukaryotes


strain - correct answer ✔consists of descendants of a single, pure microbial
culture; share stable properties


Robert Hooke (1635-1703) - correct answer ✔developed a microscope that
could magnify 30X; discovered cells; composed cell theory


cell theory - correct answer ✔all living things are composed of cells


Antony van Leeuwenhoek (1632-1723) - correct answer ✔first person to
observe and describe microorganisms accurately; had a microscope that
could magnify 50-300X

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