Phylum - Protozoa 1000+ MCQ with answer for UPSC IES

1. Which of the following organelles are associated with defence in Protozoans ?
A. Nematocysts
B. Statocysts
C. Trichocysts
D. Otocysts
Answer : C

2. Which of the following is a correct matching ?
A. Yellow fever mosquitoes toga virus B
B. Rabies saliva myxomavirus
C. Poliomyelitis fleas poliovirus
D. Tobacco mosaic disease aphids tobacco mosaic virus
Answer : A

3. Nuclear dimorphism is observed in
A. Entamoeba
B. Plasmodium
C. Paramecium
D. Trypanosoma
Answer : C

4. A liver biopsy of a patient suffering from amoebic hepatic abscess would demonstrate the presence of
A. trophozoites
B. cysts
C. precystic stages
D. sporozoites
Answer : D

5. Protozoa which completely lack trophj organelles are classifed under
A. sporozoa
B. rhizopoda
C. ciliophora
D. flagellata
Answer : A

6. The first generation in the asexual phase of Plasmodium in RBCs of man is known as
A. trophozoites
B. merozoites
C. metacryptomerozoi tes
D. phanerozoites
Answer : B

7. Asexual reproduction during schizogony of malarial parasite is a kind of
A. binary fission
B. budding
C. fragmentation
D. multiple fission
Answer : D

8. The micronucleus in Paramecium is concerried with
A. vegetative function of the body
B. all the functions of the body
C. reproductive function of the body
D. locomotion
Answer : B

9. RBCs are found in the food vacuoles of
A. Amoeba proteus
B. Hydra viridissima
C. Leishmania donovani
D. Entamoeba histolytica
Answer : C

10. Sleeping sickness in man is caused by Trypanosoma by the bite of the infective
A. female Tsetse fly
B. male Tsetse fly
C. both male and female Tsetse flies
D. male and female aedes mosquito
Answer : C

11. The life cycle of Plasmodium in human blood is called
A. schizogony
B. syngamy
C. exo-erythro cytic schizogony
D. sporogony
Answer : A

12. The ecological niche of Entamoeba histolytica is
A. small intestine of man
B. arge intestine of man
C. fresh water body such as ponds, rivers etc.
D. stagnaant water
Answer : B

13. Trypanosoma gambiense inhabits the human body in the
A. blood
B. Lymph
C. blood and cerebrospinal fluid
D. cerebrospinal fluid
Answer : C

14. The type of pseudopodia found in Amoeba are
A. reticulopodia
B. lobopodia
C. actinopodia
D. aropodia
Answer : B

15. The zoological name of giant amoeba is
A. Amoeba proteus
B. Arcella sp.
C. Chaos chaos
D. Ovale sp.
Answer : C

16. Benign tertian malaria is caused by
A. P. falciparum
B. P. vivax
C. P. malariae
D. P. ovale
Answer : B

17. If a fresh water Amoeba for some reason in unable to form contractile vacuole, it will
A. stop forming pseudopodia
B. stop manufacturing metabolic water
C. burst consequent to osmotic swelling
D. become static for some time
Answer : C

18. The function of neuro-motor system of Paramecium is
A. co-ordination of various external stimuli
B. co-ordination of ciliary beat
C. control of contractile vacuole
D. any of these
Answer : B

19. In an electric field, the Paramecium moves
A. towards the negative pole
B. towards the positive pole
C. around to avoid effect of current
D. forms cyst and does not move
Answer : A

20. According to Whittaker's system of classification, all the living organisms are classifed into 5 kingdoms and Viruses are placed under
A. Monera
B. Protista
C. Protoctista
D. None of these
Answer : D

21. In Plasmodium, gametocytes are formed by j the trophozoites in the RBS of man. They do not develop fully in RBC because of
A. antibodies present in blood
B. antigens present in blood
C. higher temperautre of blood
D. lower temeprature of blood
Answer : C

22. Mild tertian malaria is caused by
A. Plasmodium vivax
B. Plasmodium falciparum
C. Plasmodium ovale
D. Plasmodium malariae
Answer : A

23. The path followed by a food vacuole in Paramecium is referred to as
A. cycloid
B. cyclic vascular path
C. cyclosis
D. cyclosphere
Answer : C

2. Highly polypoid meganucleus is present in
A. flagellates
B. ciliates
C. sporozoans
D. rhizopodans
Answer : B

25. Oocyst of Plasmodium develops from
A. female gametocyte
B. fertilised microgamete
C. fertilised macrogamete
D. ookinete
Answer : C

26. Sporogony of malaria parasite occurs in
A. liver of man
B. RBC of man
C. stomach wall of mosquito
D. salivary glands of mosquito
Answer : C

27. The digestive enzymes in Paramecium are secreted in
A. food vacuoles directly
B. lysosomes and then released into food vacuole
C. endoplasm and then pass into food vacuole
D. both lysosomes and endoplasm
Answer : B

28. The trophozoite of Entamoeba histolytica reproduces by
A. binary fission
B. sporulation
C. amitosis
D. mitosis
Answer : A

29. Schuffner's granules or dots are found in
A. trophozoite
B. sporozoite
C. schizont
D. merozoite
Answer : C

30. Entamoeba gingivalis is a parasite in the
A. pharynx of man
B. unhealthy tissue around teeth of man
C. gum boil of man
D. infected salivary glands of man
Answer : B

31. In a Paramecium, the trichocysts are used for
A. fight or flight response
B. defence
C. offense
D. both (b) and (c)
Answer : B

32. The giant Amoeba is
A. Amoeba proteus
B. Choas
C. Foraminifera
D. Pelomyxa
Answer : D

33. The pseudopodia of Amoeba are meant for
A. feeding
B. offence and defence
C. locomotion
D. both (a) and (c)
Answer : D

34. The infective stage of Entamoeba histolytica is
A. sporozoite
B. minuta form
C. mature cyst
D. trophic form
Answer : C

35. The intermediate host in the life cycle of �. histolytica is
A. Housefly
B. Mosquitoes
C. Tsetse fly
D. None of these
Answer : D

36. Trophozoites of E.histolytica reproduced by
A. binary fission
B. conjugation
C. autogamy
D. budding
Answer : A

37. Plasmalemma membrane covers thebody of
A. Taenia solium
B. Paramecium
C. Amoeba proteus
D. Plasmodium
Answer : C

38. A digenic protozoan parasite is
A. Monocystis
B. Amoeba
C. Plasmodium
D. Opalina
Answer : D

39. A food vacuole develops in Paramecium at the distal end of
A. cytopharynx
B. oral grove
C. cytostome
D. oesophagus
Answer : D

40. n Amoeba, when transferred from pond water to distilled water, forms
A. contractile vacuoles at a slower rate
B. contractile vacuoles at a faster rate
C. contractile vacuoles at the same rate
D. no contractile vacuoles
Answer : B

41. The erthrocytic phase of the life cycle of Plasmodium passes in
A. the stomach of female amopheles mosquito
B. parenchymatous cells of liver of man
C. erythrocytes of man
D. erythrocytes and blood of man
Answer : B

42. In Amoeba proteus, the term proteus is after the name of
A. the discoverer
B. a disease
C. a god
D. a place
Answer : C

43. Treatment of the infection by malarial parasite in the principal host is studied under
A. chemo-therapy
B. chemo-diagnosis
C. chemo-prophy laxis
D. prophylaxis
Answer : A

44. An example of dimorphic protozoan is
A. Amoeba proteus
B. Paramecium caudatum
C. Plasmodium
D. Polystornella
Answer : D

45. Pseudopodia of Amoeba are important for
A. locomotion only
B. feeding only
C. both (a) and (b)
D. offence of defence
Answer : C

46. When the causes ot malaria was not known, it was supposed to be cuased by
A. dirty water
B. foul air
C. mosquito
D. housefly
Answer : B

47. Entamoeba differs from Amoeba in not having
A. nucleus
B. pseudopodia
C. ectoplasm
D. contractile vascule
Answer : D

48. Trypanosoma shows the phenomenon of
A. amorphism
B. dimorphism
C. trimorphism
D. polymorphism
Answer : D

49. The transmission of Entamoeba histolytica takes place by
A. female anopheles mosquito
B. air
C. kisisng
D. contaminated food and water
Answer : A

50. Characters that are more useful in classification of animals are
A. morphological features
B. homologous features
C. analogous features
D. none of these
Answer : B