Chapter Exam

Chapter 8: Microbial Taxonomy — Online MCQ Test

Q: The authoritative manual used for classification and identification of bacteria is:

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.

Q: A bacterium is identified by its shape, Gram reaction, colony appearance, and biochemical tests. This approach belongs to:

Answer: B. Phenotypic taxonomy — Classification based on observable and testable features is called phenotypic taxonomy. It uses morphological and biochemical characters.

MICROBIOLOGY · CLASS 11th · Tamil Nadu State Board

Practice Chapter 8: Microbial Taxonomy with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th MICROBIOLOGY. 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.

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Chapter 8: Microbial Taxonomy — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th MICROBIOLOGY — Chapter 8: Microbial Taxonomy, with answers and explanations. These are sample questions; the exam has its own separate question set.

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 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.

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.

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.

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.

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Chapter 9: Environmental Microbiology