Chapter 8: Microbial Taxonomy — Online MCQ Test
MICROBIOLOGY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 8: Microbial Taxonomy with a free chapter-wise online MCQ test.
This chapter covers: Focusing on biological classification this chapter covers taxonomic hierarchies Bergey Manual classification systems phenotypic traits and molecular taxonomy. Students examine phyl....
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 8: Microbial Taxonomy — Important Questions & Answers
Which of the following is the correct order of taxonomic hierarchy from higher to lower level?
- A. Kingdom → Phylum → Class → Order → Family → Genus → Species
- B. Phylum → Kingdom → Class → Order → Family → Genus → Species
- C. Kingdom → Class → Phylum → Order → Family → Genus → Species
- D. Kingdom → Order → Class → Phylum → Family → Genus → Species
Answer: A. Kingdom → Phylum → Class → Order → Family → Genus → Species
The standard taxonomic hierarchy follows Kingdom to Species in a descending order of rank. This sequence is used for biological classification.
The standard taxonomic hierarchy follows Kingdom to Species in a descending order of rank. This sequence is used for biological classification.
The authoritative manual used for classification and identification of bacteria is:
- A. Hutchinson’s Manual of Fungi
- B. Bergey’s Manual of Determinative Bacteriology
- C. Gray’s Manual of Algae
- D. Dawson’s Manual of Protozoa
Answer: B. Bergey’s Manual of Determinative Bacteriology
Bergey’s Manual is the standard reference for bacterial classification and identification. It is widely used in microbiology.
Bergey’s Manual is the standard reference for bacterial classification and identification. It is widely used in microbiology.
A bacterium is identified by its shape, Gram reaction, colony appearance, and biochemical tests. This approach belongs to:
- A. Molecular taxonomy
- B. Phenotypic taxonomy
- C. Artificial classification only
- D. Phylogenetic reconstruction only
Answer: B. Phenotypic taxonomy
Classification based on observable and testable features is called phenotypic taxonomy. It uses morphological and biochemical characters.
Classification based on observable and testable features is called phenotypic taxonomy. It uses morphological and biochemical characters.
A microbiologist wants to classify two bacterial isolates that differ in colony morphology but share nearly identical 16S rRNA sequences. Which conclusion is most appropriate?
- A. They are definitely different genera
- B. They may be closely related despite phenotypic differences
- C. They cannot be compared taxonomically
- D. Colony morphology is always more important than sequence data
Answer: B. They may be closely related despite phenotypic differences
Similar 16S rRNA sequences indicate close evolutionary relatedness. Phenotypic differences may occur due to environmental or physiological variation.
Similar 16S rRNA sequences indicate close evolutionary relatedness. Phenotypic differences may occur due to environmental or physiological variation.
A student says, 'Bergey’s Manual classifies bacteria only on the basis of shape and staining reaction.' Which of the following is the best correction?
- A. The statement is correct
- B. Bergey’s Manual also includes physiological and genetic characteristics
- C. Bergey’s Manual is used only for fungi
- D. Bergey’s Manual is not related to taxonomy
Answer: B. Bergey’s Manual also includes physiological and genetic characteristics
Bergey’s classification is not limited to morphology alone. It uses multiple characteristics, including physiological and genetic data, for better identification.
Bergey’s classification is not limited to morphology alone. It uses multiple characteristics, including physiological and genetic data, for better identification.