Microbial Pathogenesis MCQs with Answers

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Welcome to the Microbial Pathogenesis MCQs with Answers. In this post, we have shared Microbial Pathogenesis Online Test for different competitive exams. Find practice Microbial Pathogenesis Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Microbial Pathogenesis.

Microbial Pathogenesis Online Quiz

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Test Name: Microbial Pathogenesis MCQ Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

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Microbial Pathogenesis

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1 / 40

Which pathogen is known for producing exotoxins that interfere with host cell function?

Escherichia coli

Staphylococcus epidermidis

Clostridium botulinum

2 / 40

What is the function of endotoxins in bacterial infections?

Triggering inflammation

Inhibiting cell division

Enhancing nutrient absorption

3 / 40

Which bacterial component is recognized by Toll-like receptor 4 (TLR4) on host cells?

Peptidoglycan

Lipopolysaccharide (LPS)

Teichoic acids

4 / 40

What is the primary method of transmission for the influenza virus?

Respiratory droplets

Blood transfusion

Fecal-oral route

5 / 40

What is the significance of the lipopolysaccharide (LPS) layer in Gram-negative bacteria?

Aiding in motility

Inducing strong immune responses

Facilitating nutrient uptake

6 / 40

What is the primary cause of antibiotic resistance in bacteria?

Genetic mutations

Increased nutrient availability

Environmental changes

7 / 40

What is the role of the bacterial enzyme DNase in infections?

Inhibiting DNA replication

Degrading host DNA

Synthesizing DNA

8 / 40

Which pathogen is commonly associated with toxic shock syndrome?

Pseudomonas aeruginosa

Staphylococcus aureus

Bacillus anthracis

9 / 40

What is the function of the bacterial enzyme streptokinase?

Clotting blood

Hydrolyzing urea

Dissolving blood clots

10 / 40

Which pathogen is responsible for cholera?

Yersinia pestis

Shigella dysenteriae

Vibrio cholerae

11 / 40

Which pathogen is commonly associated with urinary tract infections (UTIs)?

Salmonella enterica

Shigella flexneri

Escherichia coli

12 / 40

Which pathogen is known for causing whooping cough?

Corynebacterium diphtheriae

Clostridium tetani

Bordetella pertussis

13 / 40

Which bacterial structure is responsible for motility?

Pili

Ribosomes

Flagella

14 / 40

What is the main function of the bacterial enzyme catalase?

Synthesizing ATP

Breaking down hydrogen peroxide

Hydrolyzing proteins

15 / 40

What is the primary target of the tetanus toxin?

Respiratory system

Digestive system

Nervous system

16 / 40

Which pathogen is responsible for tuberculosis?

Mycobacterium tuberculosis

Haemophilus influenzae

Neisseria meningitidis

17 / 40

Which bacteria is commonly associated with peptic ulcers?

Vibrio cholerae

Salmonella typhi

Helicobacter pylori

18 / 40

What is the mechanism of action for the diphtheria toxin?

Disrupting cell membrane

Inhibiting protein synthesis

Degrading DNA

19 / 40

What is the primary role of macrophages in the immune response to pathogens?

Producing antibodies

Activating B cells

Phagocytosing pathogens

20 / 40

What is the role of the enzyme coagulase in Staphylococcus aureus infections?

Clotting blood to evade immune response

Breaking down blood clots

Inhibiting blood clotting

21 / 40

Which bacterial structure is primarily responsible for adherence to host cells?

Flagella

Pili

Ribosome

22 / 40

Which structure allows certain bacteria to survive harsh environmental conditions?

Endospores

Pili

Capsules

23 / 40

What is the role of the bacterial protein A in Staphylococcus aureus infections?

Binding to the Fc region of antibodies

Inhibiting cell wall synthesis

Promoting cell lysis

24 / 40

What is the role of a capsule in bacterial pathogenicity?

Facilitating nutrient uptake

Aiding in motility

Protecting bacteria from phagocytosis

25 / 40

Which bacteria are known for causing food poisoning through pre-formed toxins?

Mycobacterium tuberculosis

Streptococcus pyogenes

Staphylococcus aureus

26 / 40

Which immune cells are the primary target of HIV infection?

Macrophages

B cells

CD4+ T cells

27 / 40

Which enzyme breaks down host connective tissue to facilitate bacterial spread?

Hyaluronidase

Urease

Catalase

28 / 40

What is the function of the bacterial enzyme urease?

Inhibiting cell wall synthesis

Degrading proteins

Hydrolyzing urea to ammonia

29 / 40

Which pathogen is commonly associated with hospital-acquired pneumonia?

Pseudomonas aeruginosa

Corynebacterium diphtheriae

Legionella pneumophila

30 / 40

What is the primary role of virulence factors in microbial pathogenesis?

Enhancing pathogenicity

Reducing immune response

Promoting mutualism

31 / 40

What is the main function of hemolysins produced by certain bacteria?

Lysing red blood cells

Inhibiting white blood cells

Degrading connective tissue

32 / 40

What is the primary mode of transmission for the malaria parasite, Plasmodium?

Direct contact

Mosquito bite

Contaminated water

33 / 40

Which type of toxin is released upon bacterial cell lysis?

Endotoxin

Exotoxin

Enterotoxin

34 / 40

Which pathogen is known for causing necrotizing fasciitis, also known as flesh-eating disease?

Streptococcus pyogenes

Listeria monocytogenes

Escherichia coli

35 / 40

What is the main function of IgA proteases produced by some bacteria?

Destroying red blood cells

Inhibiting cell wall synthesis

Degrading host antibodies

36 / 40

Which pathogen is responsible for causing Lyme disease?

Treponema pallidum

Borrelia burgdorferi

Chlamydia trachomatis

37 / 40

What is the main function of siderophores in microbial infections?

Sequestering iron from the host

Enhancing toxin production

Destroying host cells

38 / 40

Which pathogen causes syphilis?

Treponema pallidum

Haemophilus ducreyi

Neisseria gonorrhoeae

39 / 40

What is the primary method of transmission for hepatitis B virus?

Blood and bodily fluids

Contaminated water

Respiratory droplets

40 / 40

Which type of pathogen relies on living host cells for replication?

Extracellular pathogens

Obligate intracellular pathogens

Facultative intracellular pathogens

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admin4 weeks ago

0 3 1 minute read