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 / 30Bacteria reproduce by which method? Binary fission Mitosis Conjugation Budding 2 / 30Which staining technique is used to classify bacteria as Gram-positive or Gram-negative? Ziehl-Neelsen stain Gram stain India ink stain Acid-fast stain 3 / 30The cell wall of Gram-positive bacteria is rich in: Mycolic acid Peptidoglycan Lipopolysaccharide Phospholipids 4 / 30Which bacteria is known for causing tuberculosis? Mycobacterium tuberculosis Mycoplasma pneumoniae Bacillus subtilis Streptococcus pneumoniae 5 / 30Bacterial transformation involves: Uptake of naked DNA Viral DNA transfer Cell lysis Bacterial sex via pili 6 / 30Which of the following is a key virulence factor of Neisseria meningitidis? M protein Endotoxin Exotoxin A Capsule 7 / 30The term “normal flora” refers to: All microbes Antibiotic-resistant bacteria Harmful microbes Microbes that normally reside in the body without causing disease 8 / 30Which of the following is a Gram-positive bacterium? Staphylococcus aureus Pseudomonas aeruginosa Salmonella typhi Escherichia coli 9 / 30Gram-negative bacteria have: Teichoic acids No cell wall Thick peptidoglycan layer Outer membrane with lipopolysaccharides 10 / 30The Quellung reaction is used to detect: Capsules Flagella Endospores Pili 11 / 30Which of the following is an indicator organism for water quality testing? Salmonella typhi Vibrio cholerae Escherichia coli Shigella dysenteriae 12 / 30Which method is used to detect bacterial endotoxin contamination in pharmaceuticals? PCR Western blot ELISA Limulus Amebocyte Lysate (LAL) test 13 / 30Which bacterial genus lacks a cell wall? Corynebacterium Mycoplasma Mycobacterium Bacillus 14 / 30Which structure is responsible for bacterial motility? Capsule Pili Flagella Ribosome 15 / 30Bacterial capsules are primarily composed of: Lipids Polysaccharides Proteins Nucleic acids 16 / 30Which of the following bacteria is acid-fast? Proteus mirabilis Mycobacterium leprae Bacillus anthracis Klebsiella pneumoniae 17 / 30The bacterial ribosome is of which type? 70S 60S 50S 80S 18 / 30Which type of bacterial plasmid can confer antibiotic resistance? Cryptic plasmid F plasmid Col plasmid R plasmid 19 / 30The Lancefield classification is used for: Enterobacteriaceae Streptococci Clostridia Staphylococci 20 / 30Which antibiotic inhibits bacterial cell wall synthesis? Ciprofloxacin Tetracycline Penicillin Erythromycin 21 / 30Which bacterial enzyme helps in escaping neutrophil traps (NETs)? DNase Coagulase Catalase Beta-lactamase 22 / 30Beta-hemolysis on blood agar is shown by: Viridans streptococci Streptococcus pneumoniae Streptococcus pyogenes Enterococcus faecalis 23 / 30The main target of aminoglycosides in bacteria is: DNA gyrase Cell wall 30S ribosomal subunit 50S ribosomal subunit 24 / 30Which of the following is an obligate intracellular bacterium? Chlamydia trachomatis Staphylococcus aureus Mycobacterium leprae Escherichia coli 25 / 30Toxins that stimulate massive cytokine release are known as: Superantigens Neurotoxins Enterotoxins Endotoxins 26 / 30Which bacteria show swarming motility on culture media? Salmonella typhi Pseudomonas aeruginosa Vibrio cholerae Proteus mirabilis 27 / 30Which of the following bacteria produces diphtheria toxin? Clostridium difficile Bordetella pertussis Listeria monocytogenes Corynebacterium diphtheriae 28 / 30Which of the following is a facultative anaerobe? Clostridium tetani Bacteroides fragilis Mycobacterium tuberculosis Escherichia coli 29 / 30Which bacteria can form spores? Neisseria gonorrhoeae Escherichia coli Staphylococcus epidermidis Clostridium botulinum 30 / 30Which bacteria is shaped like a spiral? Spirochete Bacillus Vibrio Streptococcus Your score isThe average score is 61% 0% Restart quiz
