MICR 351 EXAM QUESTIONS AND ANSWERS – WELL ARRANGED
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MICR 351
MICR 351 EXAM QUESTIONS AND ANSWERS – WELL ARRANGED
1. How many hierarchy levels are there in taxonomic rank, excluding kingdoms?
a. Five
b. Seven
c. Ten
d. Twelve - Answer-Answer: b. Seven
2. What is a Type Strain in taxonomy?
a. Any variant within a species
b. The prot...
MICR 351 EXAM QUESTIONS AND
ANSWERS – WELL ARRANGED
1. How many hierarchy levels are there in taxonomic rank, excluding kingdoms?
a. Five
b. Seven
c. Ten
d. Twelve - Answer-Answer: b. Seven
2. What is a Type Strain in taxonomy?
a. Any variant within a species
b. The prototype strain first studied and best characterized
c. A strain that differs in serovar
d. A strain with unique morphological characteristics - Answer-Answer: b. The
prototype strain first studied and best characterized
3. What is a strain in taxonomy?
a. A type of kingdom
b. A variant within a species distinguishable from another member
c. A class of organisms
d. A category in ecological niche - Answer-Answer: b. A variant within a species
distinguishable from another member
4. In what ways can a strain differ?
a. Biovars, Morphovars, Serovar
b. Genetic, Ecological, Nomenclature
c. Morphological, Physiological, Kingdom
d. Class, Order, Family - Answer-Answer: a. Biovars, Morphovars, Serovar
5. What characteristics are utilized in classical taxonomy?
a. Only morphological
b. Only physiological/biochemical
c. Morphological, physiological/biochemical, ecological niche, genetics
d. Only ecological niche - Answer-Answer: c. Morphological, physiological/biochemical,
ecological niche, genetics
,6. What is used in molecular taxonomy for studying evolutionary relationships?
a. Only protein structure
b. Only nucleic acid content
c. Both protein structure and nucleic acid content
d. Only ecological niche - Answer-Answer: c. Both protein structure and nucleic acid
content
7. What is the conserved region used for studying evolutionary relationships in
molecular taxonomy?
a. 5S rRNA
b. 16S rRNA
c. 23S rRNA
d. mRNA - Answer-Answer: b. 16S rRNA
8. What is Eocytes in polyphasic taxonomy?
a. Extremely thermophilic eukaryotic organisms
b. Prokaryotic organisms with eukaryotic-like properties
c. Organisms with sulfur-dependent metabolism
d. Mesosome-containing organisms - Answer-Answer: c. Organisms with sulfur-
dependent metabolism
9. What is the significance of rRNA signature sequence differences in polyphasic
taxonomy?
a. They are used for protein synthesis only
b. They help in the identification of pathogens
c. They provide information about evolutionary relationships
d. They are specific to gram-negative bacteria - Answer-Answer: c. They provide
information about evolutionary relationships
10. Which characteristic is commonly used in bacterial identification based on Gram-
stain?
a. Cell size
b. Cell shape
c. Cell wall characteristic
d. Cell motility - Answer-Answer: c. Cell wall characteristic
11. What is the primary purpose of Microbial Taxonomy?
a. Identifying pathogens
b. Communicating effectively among microbiologists
c. Studying microbial genetics
, d. Creating new microbial species - Answer-Answer: b. Communicating effectively
among microbiologists**
12. What does taxonomy involve?
a. Only classification
b. Only identification
c. Classification, nomenclature, and identification
d. Only nomenclature - Answer-Answer: c. Classification, nomenclature, and
identification**
13. What is the focus of classification in taxonomy?
a. Morphological features
b. Evolutionary relationships
c. Biochemical characteristics
d. All of the above - Answer-Answer: b. Evolutionary relationships**
14. Which taxonomic groups are commonly used in nomenclature?
a. Genus and Family
b. Class and Order
c. Genus and Species
d. Order and Phylum - Answer-Answer: c. Genus and Species
15. Which organisms are used as examples for classification in the provided
information?
a. Pseudomonas aeruginosa and Escherichia coli
b. Bacillus subtilis and Staphylococcus aureus
c. Salmonella typhimurium and Streptococcus pneumoniae
d. Mycobacterium tuberculosis and Clostridium botulinum - Answer-Answer: a.
Pseudomonas aeruginosa and Escherichia coli
16. What is the primary purpose of identifying isolates in taxonomy?
a. Establishing new species
b. Communicating with other scientists
c. Assigning isolates to recognized taxa
d. All of the above - Answer-Answer: c. Assigning isolates to recognized taxa
17. What is the generation time of procaryotes relative to eukaryotes?
a. 1 hour
b. 20 minutes
c. 24 hours
, d. 7 days - Answer-Answer: b. 20 minutes
18. According to the Endosymbiotic Hypothesis, how are mitochondria and chloroplasts
believed to have originated?
a. Through bacterial sporulation
b. Engulfment of cyanobacteria by eukaryotic precursors
c. Giant virus formation
d. All of the above - Answer-Answer: b. Engulfment of cyanobacteria by eukaryotic
precursors
19. What features do both mitochondria and chloroplasts share with bacteria?
a. Circular chromosome
b. Independent ribosomes
c. Double membranes
d. All of the above - Answer-Answer: d. All of the above
20. How many domains of life are recognized in the Three Domains of Life
classification?
a. Four
b. Six
c. Seven
d. Three - Answer-Answer: d. Three
21. What is the most common type of sugars mentioned, characterized by being
polyhydroxy-ketone or aldehyde?
a. Disaccharides
b. D-sugars
c. Monosaccharides
d. Phospholipids - Answer-Answer: c. Monosaccharides
22. Which projection is commonly used to represent the spatial arrangement of sugars?
a. Fischer projection
b. Haworth projection
c. Fluid Mosaic Lipid Bilayer
d. Freeze-Fracturing - Answer-Answer: b. Haworth projection
23. What term is used to describe the inter-conversion between α and β forms of sugar
rings?
a. Stereoisomerism
b. Epimerization
c. Fischer transformation
d. α−β Ring Inter-conversion - Answer-Answer: d. α−β Ring Inter-conversion
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