Question 1

Which flagellar arrangement describes a bacterium with a single flagellum located at one end of the cell?

Accepted Answer

Monotrichous

Question 2

A bacterium with flagella distributed all over its surface is classified as which type?

Accepted Answer

Peritrichous

Question 3

Which bacterial morphology is characterized by spherical cells arranged in clusters?

Accepted Answer

Staphylococci

Question 4

If a bacterium has flagella at both poles, what is its flagellar arrangement called?

Accepted Answer

Amphitrichous

Question 5

Which bacterial shape is best described as rod-like and often forms chains?

Accepted Answer

Streptobacilli

Question 6

A bacterium with a tuft of flagella at one end is classified as:

Accepted Answer

Lophotrichous

Question 7

Which of the following is NOT a cocci arrangement?

Accepted Answer

Streptobacilli

Question 8

What is the main advantage for bacteria with peritrichous flagella in a liquid environment?

Accepted Answer

They can change direction rapidly and move efficiently toward nutrients.

Question 9

Which bacterial morphology is most likely to be mistaken for a virus under a light microscope due to its small size and shape?

Accepted Answer

Coccobacillus

Question 10

A clinical sample shows bacteria arranged in packets of eight. Which term best describes this arrangement?

Accepted Answer

Sarcina cocci

Question 11

Which of the following equations best represents the probability $$P of $$randomly selecting a bacterium with monotrichous flagella from a population of $$N$$ bacteria, where $$n$$ are monotrichous?

Accepted Answer

$$P = \frac{n}{N}$$

Question 12

Which bacterial shape is most likely to be associated with the causative agent of cholera?

Accepted Answer

Vibrio

Question 13

A patient sample contains bacteria with a helical form and flexible cell wall. Which group does this bacterium most likely belong to?

Accepted Answer

Spirochete

Question 14

Which appendaged bacterial structure is primarily used for attachment rather than motility?

Accepted Answer

Hypha

Question 15

If a bacterium is described as 'club rod,' which morphological group does it belong to?

Accepted Answer

Others

Question 16

Which bacterial arrangement is most likely to be found in a pus sample from a skin abscess?

Accepted Answer

Staphylococci

Question 17

A bacterium with a stalk structure is most likely to:

Accepted Answer

Attach to surfaces for nutrient absorption

Question 18

Which of the following is a multi-step process for identifying a bacterium with peritrichous flagella and bacillus morphology in a clinical sample?

Accepted Answer

Gram stain, observe motility, and check for rod-shaped cells with flagella all over

Question 19

Which equation best describes the total number of flagella $$F in a $$population of $$N$$ lophotrichous bacteria, each with $$k$$ flagella?

Accepted Answer

$$F = N 	imes k$$

Question 20

Which bacterial morphology is most likely to be associated with filamentous bacteria found in soil?

Accepted Answer

Filamentous

Bacterial Morphology and Flagellar Arrangements

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