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MCB 2610 Exam 1 Question and answers correctly solved 2024/2025
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MCB 2610 Exam 1 Question and answers correctly solved 2024/2025 MCB 2610 Exam 1 Microbiology - correct answer The study of microbes (microscopic organisms) Prokaryotic cells - correct answer Lack a true membrane-delimited nucleus (open floor plan); this is not absolute Eukaryotic cel...

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  • October 16, 2024
  • 20
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • mcb 2610 exam 1
  • mcb 2610 exam 1 question and answers correctly so

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MCB 2610 Exam 1
Microbiology - correct answer ✔The study of microbes (microscopic
organisms)


Prokaryotic cells - correct answer ✔Lack a true membrane-delimited nucleus
(open floor plan); this is not absolute


Eukaryotic cells - correct answer ✔- Have a membrane-enclosed nucleus
(closed floor plan)
- Have compartmentalization (can separate cellular processes)
- Are more complex morphologically


Two group classification scheme - correct answer ✔- Was the first system to
attempt to identify relationships between organisms.
- Put into place by Aristotle with the two groups being Plantae and Animalia
- Helped in some respects but one big issue with this scheme is that it did not
allow for a high level of diversity.
- Used up until the 1900s


Five kingdom classification scheme - correct answer ✔- This scheme was
put into place by Robert Witticker in the 1960s
- Used until the mid-1990s
- Recognition that we needed to put into place a new system that took into
account more of the diversity that we find both on a macro and microscopic
level.
- Organisms were put into these classifications based on physical
characteristics and cellular architecture (microscopic organisms)

,Monera, Protista, Fungi, Animalia, Plantae - correct answer ✔What were the
five kingdoms in the five kingdom classification scheme?


Three domain classification scheme - correct answer ✔§ Developed due to
advances in molecular techniques
· Electron microscopy: Allows us to visualize microscopic organisms
· Biochemical and physiological techniques: Allow us to learn more about
various microorganisms sequencing
Sequencing: The ability to determine nucleic acid and proteins sequences


Bacteria, Archaea, Eukarya - correct answer ✔What were the three domains
in the three domain classification scheme?


Carl Woese - correct answer ✔Who formed the three domain classification
scheme?


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


Archaea - correct answer ✔- Distinguished from Bacteria by 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 unclear

, Eukarya - correct answer ✔- Generally larger than Bacteria and Archaea
- Plants and animals
- Microorganisms classified as protists or fungi


Protists - correct answer ✔Ex: Algae, Protozoa, Slime molds, Water molds


Fungi - correct answer ✔Ex: Yeasts (unicellular), Molds (multicellular),
Primarily decomposers, some cause disease


Viruses (Acellular Infectious Agents) - correct answer ✔- Smallest of all
microbes
- Very simple - some consist of only proteins and nucleic acids
- Requires host cell to replicate
- Cause range of diseases,
- Some cancers


Viroids and virusoids - correct answer ✔Infectious agents composed
of RNA


Prions - correct answer ✔Infectious proteins


- Metabolism
- Growth
- Reproduction
- Genetic variation/evolution
- Response

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