Bacteriology Quiz: Test Your Knowledge Bacteriology QuizWelcome to the Bacteriology Quiz on Learn Microbiology. This quiz is designed to help you assess your understanding of bacterial structure, classification, physiology, pathogenesis, and lab diagnosis. Whether you're a beginner or an advanced learner, challenge yourself with questions covering Gram staining, antibiotic resistance, bacterial diseases, and more. Select the correct answer and track your score to boost your microbiology knowledge. NameEmail 1 / 30Which of the following is a key virulence factor of Neisseria meningitidis? M protein Endotoxin Capsule Exotoxin A 2 / 30Which bacteria can form spores? Escherichia coli Staphylococcus epidermidis Neisseria gonorrhoeae Clostridium botulinum 3 / 30Which of the following is an indicator organism for water quality testing? Vibrio cholerae Shigella dysenteriae Salmonella typhi Escherichia coli 4 / 30Bacteria reproduce by which method? Binary fission Conjugation Mitosis Budding 5 / 30Bacterial capsules are primarily composed of: Nucleic acids Lipids Proteins Polysaccharides 6 / 30Gram-negative bacteria have: No cell wall Outer membrane with lipopolysaccharides Thick peptidoglycan layer Teichoic acids 7 / 30Which of the following is a Gram-positive bacterium? Staphylococcus aureus Salmonella typhi Pseudomonas aeruginosa Escherichia coli 8 / 30The Lancefield classification is used for: Staphylococci Enterobacteriaceae Clostridia Streptococci 9 / 30Which bacterial enzyme helps in escaping neutrophil traps (NETs)? Coagulase DNase Catalase Beta-lactamase 10 / 30Bacterial transformation involves: Uptake of naked DNA Viral DNA transfer Bacterial sex via pili Cell lysis 11 / 30The term “normal flora” refers to: Antibiotic-resistant bacteria Microbes that normally reside in the body without causing disease All microbes Harmful microbes 12 / 30Which bacteria is known for causing tuberculosis? Streptococcus pneumoniae Bacillus subtilis Mycobacterium tuberculosis Mycoplasma pneumoniae 13 / 30Which bacterial genus lacks a cell wall? Corynebacterium Mycoplasma Mycobacterium Bacillus 14 / 30Which bacteria show swarming motility on culture media? Vibrio cholerae Proteus mirabilis Pseudomonas aeruginosa Salmonella typhi 15 / 30Which of the following is an obligate intracellular bacterium? Staphylococcus aureus Chlamydia trachomatis Mycobacterium leprae Escherichia coli 16 / 30The main target of aminoglycosides in bacteria is: 50S ribosomal subunit DNA gyrase 30S ribosomal subunit Cell wall 17 / 30Which method is used to detect bacterial endotoxin contamination in pharmaceuticals? Western blot ELISA PCR Limulus Amebocyte Lysate (LAL) test 18 / 30Which structure is responsible for bacterial motility? Ribosome Flagella Capsule Pili 19 / 30The Quellung reaction is used to detect: Capsules Pili Endospores Flagella 20 / 30Which bacteria is shaped like a spiral? Streptococcus Spirochete Vibrio Bacillus 21 / 30Which of the following bacteria produces diphtheria toxin? Listeria monocytogenes Clostridium difficile Corynebacterium diphtheriae Bordetella pertussis 22 / 30Which type of bacterial plasmid can confer antibiotic resistance? F plasmid Cryptic plasmid Col plasmid R plasmid 23 / 30Toxins that stimulate massive cytokine release are known as: Superantigens Neurotoxins Enterotoxins Endotoxins 24 / 30Beta-hemolysis on blood agar is shown by: Viridans streptococci Enterococcus faecalis Streptococcus pyogenes Streptococcus pneumoniae 25 / 30Which antibiotic inhibits bacterial cell wall synthesis? Erythromycin Penicillin Tetracycline Ciprofloxacin 26 / 30The bacterial ribosome is of which type? 50S 80S 70S 60S 27 / 30Which of the following bacteria is acid-fast? Mycobacterium leprae Klebsiella pneumoniae Proteus mirabilis Bacillus anthracis 28 / 30Which of the following is a facultative anaerobe? Escherichia coli Bacteroides fragilis Mycobacterium tuberculosis Clostridium tetani 29 / 30Which staining technique is used to classify bacteria as Gram-positive or Gram-negative? Gram stain Acid-fast stain Ziehl-Neelsen stain India ink stain 30 / 30The cell wall of Gram-positive bacteria is rich in: Peptidoglycan Phospholipids Lipopolysaccharide Mycolic acid Your score isThe average score is 58% 0% Restart quiz
