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Microbiology - MB5

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60 questions
Jun 10, 2025

Question 1

What prevents phagocytic activity?

Réponse

The capsule prevents phagocytic activity.

Question 2

What is the capsule made up of?

Réponse

The capsule is made up of polysaccharides (sugar).

Question 3

What reaction indicates the presence of an antigen?

Réponse

The positive quelling reaction indicates the presence of an antigen.

Question 4

What allows bacteria to survive in unfavorable environments?

Réponse

Spores allow bacteria to survive in unfavorable environments.

Question 5

What structure provides motility to bacteria?

Réponse

Flagella provide motility to bacteria.

Question 6

What advantage do flagella give bacteria?

Réponse

Flagella give bacteria a survival advantage in host-parasite interaction.

Question 7

What type of microscope can detect flagella?

Réponse

Phase contrast microscope can detect flagella.

Question 8

Name another type of microscope that can detect flagella.

Réponse

Electron microscope can detect flagella.

Question 9

What is a third type of microscope that can detect flagella?

Réponse

Darkfield microscope can detect flagella.

Question 10

What is a monotrichous flagellum?

Réponse

A monotrichous flagellum is a single flagellum.

Question 11

What is an amphitrichous flagellum?

Réponse

An amphitrichous flagellum is a single flagellum at both ends.

Question 12

What characterizes a lophotrichous flagellum?

Réponse

A lophotrichous flagellum has a group of flagella at one or both sides.

Question 13

What is a peritrichous flagellum?

Réponse

A peritrichous flagellum has a group of flagella all over the cell wall.

Question 14

What is the function of pili?

Réponse

Pili are hair-like structures for attachment onto tissue surfaces.

Question 15

What may pili serve as?

Réponse

Pili may serve as receptor sites for bacterial viruses.

Question 16

What is considered the ultimate parasite in the body?

Réponse

Virus is considered the ultimate parasite in the body.

Question 17

What is the role of the capsule in bacteria?

Réponse

The capsule prevents phagocytic activity.

Question 18

What is the composition of the capsule?

Réponse

The capsule is made of polysaccharides.

Question 19

What does a positive quelling reaction signify?

Réponse

It signifies the presence of an antigen.

Question 20

How do spores help bacteria?

Réponse

Spores help bacteria survive in unfavorable environments.

Question 21

What is the function of flagella?

Réponse

Flagella provide motility to bacteria.

Question 22

What is the significance of motility in bacteria?

Réponse

Motility gives bacteria a survival advantage in host-parasite interactions.

Question 23

Which microscope uses phase contrast?

Réponse

Phase contrast microscope uses phase contrast.

Question 24

What type of microscope uses electron beams?

Réponse

Electron microscope uses electron beams.

Question 25

What type of microscope uses darkfield illumination?

Réponse

Darkfield microscope uses darkfield illumination.

Question 26

What is a characteristic of a monotrichous flagellum?

Réponse

A monotrichous flagellum has one single flagellum.

Question 27

What does amphitrichous mean?

Réponse

Amphitrichous means having a single flagellum at both ends.

Question 28

What does lophotrichous refer to?

Réponse

Lophotrichous refers to a group of flagella at one or both sides.

Question 29

What does peritrichous mean?

Réponse

Peritrichous means having flagella all over the cell wall.

Question 30

What is the purpose of pili in bacteria?

Réponse

Pili help in attachment to tissue surfaces.

Question 31

What do pili serve as for viruses?

Réponse

Pili serve as receptor sites for viruses.

Question 32

What is the ultimate parasite mentioned?

Réponse

The ultimate parasite mentioned is a virus.

Question 33

What is the structural role of the capsule?

Réponse

The capsule provides structural protection against phagocytosis.

Question 34

What type of reaction is the positive quelling reaction?

Réponse

It is an immunological reaction indicating antigen presence.

Question 35

What do spores allow bacteria to do?

Réponse

Spores allow bacteria to endure harsh conditions.

Question 36

What is the significance of flagella in bacteria?

Réponse

Flagella are significant for movement and survival.

Question 37

What is a common feature of flagella?

Réponse

Flagella can extend from one end or both ends.

Question 38

What microscope can be used to observe flagella?

Réponse

Phase contrast microscope can be used to observe flagella.

Question 39

What is the function of a darkfield microscope?

Réponse

A darkfield microscope enhances contrast in unstained samples.

Question 40

What is the role of a flagellum in bacteria?

Réponse

A flagellum aids in bacterial motility.

Question 41

What does a group of flagella at one side indicate?

Réponse

It indicates a lophotrichous arrangement.

Question 42

What is the role of pili in viral infections?

Réponse

Pili act as receptors for viruses.

Question 43

What does the term 'capsule' refer to?

Réponse

The capsule refers to a protective layer around bacteria.

Question 44

What are polysaccharides?

Réponse

Polysaccharides are sugars that make up the capsule.

Question 45

What does the positive quelling reaction test for?

Réponse

It tests for the presence of specific antigens.

Question 46

What is the survival mechanism of spores?

Réponse

Spores allow bacteria to withstand adverse conditions.

Question 47

What is the significance of motility in host interactions?

Réponse

Motility is crucial for bacteria to interact with hosts.

Question 48

What is the structure of a flagellum?

Réponse

A flagellum is a hair-like structure.

Question 49

What is the function of a microscope in studying bacteria?

Réponse

A microscope helps visualize bacterial structures.

Question 50

What does a peritrichous arrangement imply?

Réponse

It implies flagella are distributed all over the cell.

Question 51

What is the role of the capsule in bacterial defense?

Réponse

The capsule protects bacteria from immune responses.

Question 52

What do pili facilitate in bacterial cells?

Réponse

Pili facilitate adherence to surfaces.

Question 53

What is the primary function of flagella?

Réponse

The primary function of flagella is movement.

Question 54

What type of flagellar arrangement has multiple flagella on one side?

Réponse

Lophotrichous arrangement has multiple flagella on one side.

Question 55

What is a key feature of amphitrichous flagella?

Réponse

Amphitrichous flagella have one flagellum at each end.

Question 56

What is the significance of the capsule's composition?

Réponse

The composition affects its protective capabilities.

Question 57

What is the role of the flagella in bacteria's survival?

Réponse

Flagella enhance survival by enabling movement.

Question 58

What is the structure of pili?

Réponse

Pili are hair-like structures.

Question 59

What is the relationship between viruses and pili?

Réponse

Viruses may use pili as entry points into bacterial cells.

Question 60

What is the overall function of the capsule?

Réponse

The overall function of the capsule is to protect bacteria.

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