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Basic Medical Microbiology Questions, Quizzes of Medical Microbiology

De La Salle University (DLSU)Medical Microbiology

This is a multiple-choice type of questions from the following topics: - Microbial Taxonomy - Bacterial Genetics, Metabolism, and Structure - Host-Microorganism interactions The answers and rationale can be find in the last page of the document

Typology: Quizzes

2016/2017

Available from 12/05/2024

agtstudies 🇵🇭

2 documents

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1. Which taxonomic tool analyzes microbial fatty acid profiles for classification?

• A) Polyphasic taxonomy

• B) MALDI-TOF MS

• C) Chemotaxonomic methods

• D) Nucleic acid hybridization

2. The threshold for genome-to-genome distance (GGD) to confirm species-level similarity is:

• A) 80%

• B) 60%

• C) 70%

• D) 90%

3. Which phenotypic trait is least reliable for bacterial classification?

• A) Staining characteristics

• B) Colony morphology

• C) Nutritional requirements

• D) Antibiotic resistance

4. What is the key difference between the Archaea and Bacteria domains?

• A) Presence of peptidoglycan

• B) DNA composition

• C) Cell membrane lipid composition

• D) Ribosome structure

5. In binomial nomenclature, which is correctly formatted?

• A) Staphylococcus aureus

• B) staphylococcus aureus

• C) Staphylococcus Aureus

• D) Staphylococcus aureus

6. Which genetic process involves the uptake of naked DNA by bacteria?

• A) Transduction

• B) Conjugation

• C) Transformation

• D) Mutation

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Which taxonomic tool analyzes microbial fatty acid profiles for classification?
- A) Polyphasic taxonomy
- B) MALDI-TOF MS
- C) Chemotaxonomic methods
- D) Nucleic acid hybridization
The threshold for genome-to-genome distance (GGD) to confirm species-level similarity is:
- A) 80%
- B) 60%
- C) 70%
- D) 90%
Which phenotypic trait is least reliable for bacterial classification?
- A) Staining characteristics
- B) Colony morphology
- C) Nutritional requirements
- D) Antibiotic resistance
What is the key difference between the Archaea and Bacteria domains?
- A) Presence of peptidoglycan
- B) DNA composition
- C) Cell membrane lipid composition
- D) Ribosome structure
In binomial nomenclature, which is correctly formatted?
- A) Staphylococcus aureus
- B) staphylococcus aureus
- C) Staphylococcus Aureus
- D) Staphylococcus aureus
Which genetic process involves the uptake of naked DNA by bacteria?
- A) Transduction
- B) Conjugation
- C) Transformation
- D) Mutation

What enzyme is central to DNA replication in bacteria?
- A) RNA polymerase
- B) DNA polymerase
- C) Helicase
- D) Topoisomerase
Which process results in antibiotic resistance via gene cassette acquisition?
- A) Plasmid transfer
- B) Transduction
- C) Transposon-mediated insertion
- D) Horizontal gene transfer
A mutation that results in a stop codon is called:
- A) Silent mutation
- B) Missense mutation
- C) Frameshift mutation
- D) Nonsense mutation
What is the role of RecA in bacterial recombination?
- A) Facilitating DNA repair and homologous recombination
- B) Synthesizing DNA
- C) Breaking hydrogen bonds in double-stranded DNA
- D) Inhibiting transcription factors
Which molecule acts as the final electron acceptor in aerobic respiration?
- A) Nitrogen
- B) Oxygen
- C) Sulfate
- D) Carbon dioxide
What pathway produces both NADPH and ribose- 5 - phosphate?
- A) Glycolysis
- B) TCA cycle
- C) Pentose phosphate pathway
- D) Fermentation

Which bacterial toxin inhibits protein synthesis by targeting EF-2?
- A) Shiga toxin
- B) Diphtheria toxin
- C) Cholera toxin
- D) Botulinum toxin
What is the first step in establishing infection by a pathogen?
- A) Invasion
- B) Dissemination
- C) Colonization
- D) Adhesion
Which component of the Gram-negative bacterial wall acts as an endotoxin?
- A) Lipoteichoic acid
- B) Peptidoglycan
- C) Lipopolysaccharide (LPS)
- D) Capsule

Basic Medical Microbiology Questions, Quizzes of Medical Microbiology

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