65 MICROBIOLOGY QUESTIONS
For nurses & midwives
Part 1: Fundamentals & Microscopy
Who is widely known as the "Father of Microbiology" for his discovery of the microscopic world Microbiology MCQ (Multiple Choice Questions) - Sanfoundry?
A. Louis Pasteur
B. Robert Koch
C. Antoni van Leeuwenhoek
D. Joseph ListerThe term "animalcules" was coined by:
A. Robert Koch
B. Antoni van Leeuwenhoek
C. Louis Pasteur
D. Alexander FlemingWho... developed the rabies vaccine?
A. Edward Jenner
B. Paul Ehrlich
C. Louis Pasteur
D. Robert KochWhich type of microscope is most commonly used in a routine clinical laboratory?
A. Electron microscope
B. Phase-contrast microscope
C. Compound light microscope
D. Dark-field microscopeThe total magnification of a specimen viewed with a 10x ocular lens and a 40x objective lens is:
A. 50x
B. 400x
C. 100x
D. 4000xWhich dye is used in the first step of the Gram staining process?
A. Safranin
B. Methylene blue
C. Crystal violet
D. Malachite greenGram-positive bacteria appear _________ under a microscope after staining.
A. Pink
B. Purple
C. Red
D. ColorlessThe decolorizing agent in a Gram stain is usually:
A. Acetone
B. Alcohol
C. Iodine
D. WaterBacterial cell walls are primarily composed of:
A. Cellulose
B. Chitin
C. Peptidoglycan
D. Lipid bilayerWhich of the following is NOT a characteristic of prokaryotes?
A. Presence of a true nucleus
B. Circular DNA
C. Lack of membrane-bound organelles
D. 70S ribosomesWhich structure protects bacteria from phagocytosis by the host's immune system?
A. Flagella
B. Pili
C. Capsule
D. PlasmidsHair-like appendages found on the surface of many bacteria used for attachment are called:
A. Flagella
B. Cilia
C. Fimbriae
D. SporesPlasmids are:
A. Essential for bacterial growth
B. Extrachromosomal DNA
C. Found only in fungi
D. Part of the cell wallEndospores allow a bacterium to:
A. Multiply rapidly
B. Survive in harsh environmental conditions Microbiology MCQs for First Semester | PDF | Immune System - Scribd
C. Move towards nutrients
D. Produce toxinsWhich of the following organelles is known as the "powerhouse" of a eukaryotic cell?
A. Nucleus
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Part 2: Microbial Growth & Metabolism (Q16-30)
Bacteria that require oxygen to grow are called:
A. Obligate anaerobes
B. Facultative anaerobes
C. Obligate aerobes
D. MicroaerophilesOrganisms that can grow with or without oxygen are known as:
A. Obligate aerobes
B. Facultative anaerobes
C. Microaerophiles
D. CapnophilesBacteria that thrive in cold temperatures (e.g.,
to
) are called:
A. Thermophiles
B. Mesophiles
C. Psychrophiles
D. HalophilesMost human pathogens fall into which temperature preference category?
A. Psychrophiles
B. Mesophiles
C. Thermophiles
D. HyperthermophilesThe bacterial growth curve consists of how many distinct phases?
A. 2
B. 3
C. 4
D. 5In which bacterial growth curve phase do cells adapt to their new environment and do not multiply significantly?
A. Log phase
B. Lag phase
C. Stationary phase
D. Death phaseRapid cell division and exponential growth of bacteria occur in the:
A. Lag phase
B. Log (Exponential) phase
C. Stationary phase
D. Decline phaseThe phase where the rate of bacterial cell division equals the rate of cell death is the:
A. Lag phase
B. Log phase
C. Stationary phase
D. Death phaseWhich of the following is NOT a method of bacterial reproduction?
A. Binary fission
B. Budding
C. Fragmentation
D. MitosisThe transfer of genetic material between bacteria through direct physical contact is called:
A. Transformation
B. Transduction
C. Conjugation
D. MutationThe uptake of naked DNA from the surrounding environment by a bacterial cell is known as:
A. Transformation
B. Transduction
C. Conjugation
D. TranscriptionWhen a bacteriophage (virus) transfers bacterial DNA from one bacterium to another, it is called:
A. Transformation
B. Transduction
C. Conjugation
D. TranslationWhich of the following metabolic processes yields the most ATP?
A. Fermentation
B. Anaerobic respiration
C. Aerobic respiration
D. GlycolysisThe enzyme responsible for breaking down hydrogen peroxide into water and oxygen is:
A. Amylase
B. Catalase
C. Lipase
D. ProteaseOrganisms that obtain their energy from chemical compounds are called:
A. Phototrophs
B. Chemotrophs
C. Autotrophs
D. Auxotrophs
Part 3: Pathogenic Microorganisms (Q31-45)
The study of fungi is known as:
A. Virology
B. Mycology
C. Parasitology
D. BacteriologyFungal cell walls are primarily composed of:
A. Peptidoglycan
B. Cellulose
C. Chitin
D. LigninWhich of the following is an example of a unicellular fungus?
A. Mushroom
B. Yeast
C. Mold
D. PenicilliumMalaria is caused by which type of microorganism?
A. Bacteria
B. Virus
C. Protozoa Microbiology MCQs with Answers | PDF | Microorganism - Scribd
D. FungiWhich of the following is NOT a viral characteristic?
A. Contain DNA or RNA
B. Obligate intracellular parasites 1000 Microbiology MCQs with Answers Key - E. Health Network
C. Contain a plasma membrane
D. AcellularThe protein coat surrounding the genetic material of a virus is called the:
A. Capsid
B. Envelope
C. Peplomer
D. NucleoidWhich of the following diseases is caused by a virus?
A. Tuberculosis
B. Tetanus
C. Influenza
D. SyphilisRetroviruses, such as HIV, utilize which unique enzyme to convert their RNA genome into DNA?
A. DNA polymerase
B. RNA polymerase
C. Reverse transcriptase
D. LigasePrions are infectious agents composed entirely of:
A. DNA
B. RNA
C. Protein Microbiology MCQs with Answers | PDF | Microorganism - Scribd
D. CarbohydratesWhich of the following causes oral thrush?
A. Staphylococcus aureus
B. Candida albicans
C. Escherichia coli
D. Herpes simplexWhich bacteria is primarily responsible for dental caries (cavities)?
A. Streptococcus mutans
B. Helicobacter pylori
C. Salmonella typhi
D. Vibrio choleraeGastric ulcers are most commonly caused by:
A. E. coli
B. Streptococcus pneumoniae
C. Helicobacter pylori
D. Shigella dysenteriaeThe vector responsible for transmitting the plague is:
A. Mosquito
B. Flea 1000 Microbiology MCQs with Answers Key - E. Health Network
C. Tick
D. Tse-tse flyMycobacterium tuberculosis is a:
A. Gram-positive rod
B. Gram-negative rod
C. Acid-fast bacillus
D. SpirocheteWhich of the following is a symptom of cholera?
A. Constipation
B. High fever
C. Rice-watery diarrhea
D. Skin rash
Part 4: Immunology & Host Defense (Q46-65)
Which of the following is NOT part of the innate immune response?
A. Phagocytosis
B. Mucous membranes
C. Antibody production 1000 Microbiology MCQs with Answers Key - E. Health Network
D. FeverWhich white blood cell is primarily responsible for phagocytosis?
A. Erythrocyte
B. Neutrophil
C. Basophil
D. LymphocyteWhich of the following cells is a key player in the cell-mediated adaptive immune response?
A. B cells
B. T cells
C. Neutrophils
D. PlateletsHumoral immunity is primarily mediated by:
A. T cells
B. B cells
C. Macrophages
D. Natural Killer cellsAntibodies are also known as:
A. Antigens
B. Immunoglobulins
C. Cytokines
D. InterferonsWhich immunoglobulin is the first to be produced in response to an initial infection?
A. IgA
B. IgE
C. IgM
D. IgGWhich immunoglobulin is the most abundant in serum and can cross the placenta?
A. IgA
B. IgD
C. IgG
D. IgMWhich immunoglobulin is primarily found in external secretions like breast milk, saliva, and tears?
A. IgA Microbiology Test: Key Concepts and MCQs | PDF | Bacteria - Scribd
B. IgE
C. IgG
D. IgMWhich immunoglobulin is associated with allergic reactions and parasitic infections?
A. IgA
B. IgE BS Nursing 1st Semester MCQS and Microbiology Past Paper - Scribd
C. IgG
D. IgMThe process of coating a pathogen with antibodies or complement proteins to enhance phagocytosis is called:
A. Neutralization
B. Agglutination
C. Opsonization
D. PrecipitationWhich of the following cells produces antibodies?
A. Plasma cells
B. Cytotoxic T cells
C. Helper T cells
D. Dendritic cellsVaccines provide what type of immunity?
A. Natural active immunity
B. Artificial active immunity
C. Natural passive immunity
D. Artificial passive immunityReceiving antibodies via a snake antivenom injection is an example of:
A. Natural active immunity
B. Artificial active immunity
C. Natural passive immunity
D. Artificial passive immunityA newborn receiving antibodies through breast milk is experiencing:
A. Natural active immunity
B. Natural passive immunity
C. Artificial active immunity
D. Artificial passive immunity
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Answers coming soon
MICROBIOLOGY QUESTIONS
For nurses & midwives
Microbiology qns
Details / Answer
For nurses & midwives
Which of the following is a cardinal clinical feature of heart failure
Which of the following is a cardinal clinical feature of heart failure
Which of the following is a cardinal clinical feature of heart failure
Details / Answer
A. Cyanosis
B. Lower limb edema
C. Difficult in breathing on exertion
D. PND
E. None of the above