Question 1

Which of the following best describes the traditional classification of protozoa?

Accepted Answer

Based on their method of motility

Question 2

A protozoan with multiple flagella located at the anterior end, which pulls the cell forward, would most likely be classified as which group?

Accepted Answer

Mastigophora (Flagellates)

Question 3

Which structure is responsible for the coordinated movement seen in Ciliophora?

Accepted Answer

Cilia

Question 4

A patient presents with a protozoan infection. The organism is non-motile, intracellular, and reproduces both sexually and asexually. Which group does this organism most likely belong to?

Accepted Answer

Apicomplexa

Question 5

Which of the following statements about cyst formation in protozoa is correct?

Accepted Answer

Cyst formation allows protozoa to survive harsh conditions by becoming dormant

Question 6

During the life cycle of Giardia, which event occurs after ingestion of cysts?

Accepted Answer

Excystment in the small intestine

Question 7

Which of the following best explains the function of an undulating membrane in certain flagellates?

Accepted Answer

It encloses a flagellum and pushes the cell forward

Question 8

Which process in Ciliophora allows for genetic exchange without the formation of gametes?

Accepted Answer

Conjugation

Question 9

A protozoan parasite reproduces asexually in humans and sexually in mosquitoes. Which disease is most likely caused by this organism?

Accepted Answer

Malaria

Question 10

Which of the following is a correct sequence of events in the general protozoan life cycle involving cysts?

Accepted Answer

Encystment, dormancy, excystment, trophozoite release

Question 11

Which of the following equations best represents the process of asexual reproduction by mitosis in protozoa?

Accepted Answer

$2n \rightarrow 2n + 2n$

Question 12

A protozoan is observed to move using 'false feet' formed by cytoskeletal changes. Which group does it belong to?

Accepted Answer

Amoebozoa

Question 13

Which of the following is a distinguishing feature of Apicomplexa compared to other protozoan groups?

Accepted Answer

They are non-motile and usually intracellular parasites

Question 14

Which of the following best describes the process of schizogony in Apicomplexa?

Accepted Answer

A form of asexual reproduction resulting in multiple daughter cells from one parent cell

Question 15

In the context of protozoan transmission, which of the following is a common route for Giardia infection?

Accepted Answer

Ingestion of cysts from contaminated water

Question 16

Which of the following statements about protozoan conjugation is correct?

Accepted Answer

It involves reciprocal exchange of genetic material without gamete formation

Question 17

A laboratory technician observes a protozoan with a ventral adhesive disk attached to the intestinal mucosa. Which organism is most likely being observed?

Accepted Answer

Giardia

Question 18

Which of the following best explains why protozoa are classified into multiple kingdoms in modern taxonomy?

Accepted Answer

Genetic and structural diversity among protozoa

Question 19

Which of the following is a real-world consequence of protozoan cyst formation for public health?

Accepted Answer

Cysts can survive in harsh environments, making waterborne outbreaks difficult to control

Question 20

A protozoan is observed to have both an undulating membrane and free flagella. Which of the following best describes its likely mode of movement?

Accepted Answer

Combination of pushing and pulling using both structures

Protozoa: Classification, Structure, and Life Cycles

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