Protista | Self evaluation Test

1. Which group of organisms are devoid of cell wall in their vegetative stage but develop a wall in reproductive phase

(a)   Fungi                                      (b)   Blue–green algae

(c)   Slime mould                         (d)   Archaebacteria

2. Cell wall are well preserved as fossils in one of the following

[BHU 1984]

(a)   Dinophyceae                        (b)   Bacillariophyceae

(c)   Cyanophyceae                     (d)   Euglenophyceae

3. The chief advantage of encystment to an Amoeba is

[CBSE PMT 2003]

(a)   The chance to get rid of accumulated waste products

(b)   The ability to survive during adverse physical conditions

(c)   The ability to live for some time without ingesting food

(d)   Protection from parasites and predators

4. In which of the following animal dimorphic nucleus is found

[CBSE PMT 2002]

(a)   Amoeba proteus                   (b)   Plasmodium vivax               

             (c)   Paramecium caudatum     (d)   Trypanosoma gambiense

5. Amoeba is called immortal and it is scattered all over the world due to                                                           [CPMT 1999]

(a)   Conjugation                          (b)   Regeneration

             (c)   Binary fission                       (d)   Sexual reproduction

6. Which is the correct order of evolution [CPMT 1998]

(a)   Leucosolenia – Hydra – Amoeba – Ascaris

(b)   Ascaris – Amoeba – Leucosolenia – Hydra

(c)   Amoeba – Leucosolenia – Hydra – Ascaris

(d)   None of these

7. Select the matching pair [MP PMT 1986]

(a)   Giardia – diarrhoea            (b)   Plasmodium – pyorrhoea

             (c)   Leishmania – dysentery     (d)   Trypanosoma – kala-azar

8. In Trypanosoma gambiense [MP PMT 1986]

(a)   Reproduction is by multiple fission

(b)   There are two nuclei, a micronucleus and a macronucleus

(c)   There are two locomotory organelles, a flagellum and an undulating membrane

             (d)   Tse-tse fly has no role to play in life cycle.

9. Trypanosoma finally invades [AFMC 1987]

(a)   Brain                                       (b)   Liver

             (c)   Blood                                      (d)   Cerebrospinal fluid

10. Contracile vacuoles of Paramecium are analogous to

                                                                                                 [CPMT 1983, 84]

(a)   Sweat glands of mammals

(b)   Uriniferous tubules

(c)   Gastrovascular cavity of Hydra

             (d)   Typhlosole of Earthworm

11. If Amoeba is kept in distilled water, its contractile vacuole

                                                                           [BHU 1982, 85; NCERT 1983]

(a)   Works slowly                       (b)   Works faster

             (c)   Remains unaffected           (d)   Disappears

12. In patient suffering from malaria, the cells having Schuffern’s granules are                                                           [CPMT 1990]

(a)   Gametocytes                        (b)   Signet ring trophozoites

             (c)   Infected erythrocytes        (d)   Infected liver cells

13. Which is true about Trypanosoma

[CBSE PMT 1990; Orissa JEE 2005]

(a)   Polymorphic                        (b)   Monogenetic

(c)   Facultative parasite           (d)   Non-pathogenic

14. The infective stage of malarial parasite Plasmodium that enters human body is

[AFMC 1985; Bihar PMT 1990; CBSE PMT 1989;

CPMT 1986, 88, 89, 98; MP PMT 1993;

Manipal 1995; Bihar PMT 1996; BHU 1996]

(a)   Merozoite                             (b)   Sporozoite

             (c)   Trophozoite                         (d)   Minuta form

15. Common trait between Amoeba and leucocyte is

                     [CPMT 1991]

(a)   Encystment                          (b)   Pseudopodia

             (c)   Sporulation                          (d)   Contractile vacuole

16. Sporozoites of malarial parasite enter [Bihar PMT 1991]

(a)   Erythrocytes of humans

(b)   Liver cells of humans

(c)   Stomach of Mosquito

             (d)   Salivary gland of Mosquito

17. Amoeba takes food through [RPMT 1995]

(a)   Phagocytosis                        (b)   Pinocytosis

             (c)   Endocytosis                          (d)   All the above

18. Which is absent in amoeba [RPMT 1996]

(a)   Golgi apparatus                   (b)   Lysosome

             (c)   Centriole                               (d)   Plasmalemma

19. Amoeba sticks to substratum by means of [RPMT 1996]

(a)   Rough surface                      (b)   Plasmalemma

             (c)   Protein                                   (d)   None of the above

20. In Plasmodium, diploid stage is [APMEE 1996]

(a)   Oocyst                                    (b)   Gamont

             (c)   Schizont                                 (d)   Sporozoite

21. A person suffering from malaria runs fever when

                                                                                 [CPMT 1998, AFMC 2001]

(a)   Exoerythrocytic cycle is completed

(b)   Signet ring stage is formed

(c)   RBCs rupture and haemozoin granules are released

(d)   All the above

22. Just a Xanopsylla is to Yersinia pestis, so is [AIIMS 2003]

(a)   Glossina palpalis to Wuchereria banerofti

(b)   Calex to Plasmodium falciparum

(c)   Homo sapiens to Taenia solium

             (d)   Phlebotomus to Leishmania denovani

23. Hyaline cap in Amoeba is formed [RPMT 1999]

             (a)   Around food vacuole

             (b)   Around contractile vacuole

             (c)   Around nucleus

             (d)   In front of pseudopodium

24. Binary fission in Amoeba involves [RPMT 1999]

             (a)   Amitosis                                (b)   Mitosis

             (c)   Meiosis                                  (d)   None of these

25. Which animal exhibits sexual dimorphism [RPMT 1999]

(a)   Lobosa                                   (b)   Ciliata

(c)   Sporozoans                          (d)   Radiolarians

1	c	2	b	3	b	4	c	5	c
6	c	7	a	8	d	9	d	10	b
11	b	12	c	13	a	14	b	15	b
16	b	17	d	18	c	19	b	20	a
21	c	22	d	23	d	24	b	25	a

1. (c) They are surrounded by the plasma membrane only (somatic parts are without cell walls). However, the spores have the cellulose cell walls.
2. (b)Amoeba forms a cyst and reproduces by multiple fission, during adverse environmental condition.
3. (c) Paramecium caudatum shows nuclear dimorphism. There are two type of nuclei – a large bean shaped polyploid vegetative nucleus called macronucleus and a small rounded diploid reproductive nucleus known as micronucleus.
4. (c) Amoeba reproducing by binary fission, the parent becomes wholly marged in the offspring. Thus, there exists a continuity of life, so that amoeba is potentially immortal and it is scattered all over the world.
5. (a) Giardia intestinalis is the parasite of Diarrhoea.
6. 9. (d) Trypanosoma is usually found in the blood of vertebrates, finally invading cerebrospinal fluid.
7. (b) Paramecium contains two contractile vacuoles. These are concerned with osmoregulation, i.e., removal of excess of water. Thus contractile vacuole of Paramecium is analogous (similar in function) to uriniferous tubules.
8. (b) If Amoeba is kept in distilled water, its contractile vacuole works faster due to increased rate of endosmosis.
9. (a) Trypanosoma is polymorphic and has four forms : Leishmania, Leptomonad, Crithidial and Trypanosomal stages.
10. (b) Stage of Plasmodium infective to man is, or the stage of Plasmodium injected by mosquito into human blood is sporozoite.
11. (b) Within half an hour or so after inoculation into human blood, all sporozoites disappear from the blood and penetrate the parenchyma cells of liver by the lytic action of their secretary organelles.
12. (c) The structures presents in Amoeba are pseudopodia, plasmalemma, nucleus, contractile vacuole, Food vaccuole, water globules, endoplasmic retieulum, ribosomes, golgi bodies, mitochondria, lysosomes and microtubules.
13. (b) Plasmalemma possesses numerous fine, ridge-like extension on its outer surface. Due to presence of its these have adhesive properties and serve to bind the animal cule to the substratum.
14. (a) The motile diploid zygote formed by fertilization (anisogamy) of macrogamete by a microgamete is called ookinete. Ookinete penetrates the stomach wall and forms encysted zygote called oocyst or sporont.
15. (c) Malaria fever occurs when schizonts in RBCs burst and set free their contained merozoites and malarial pigment (haemozoin) in the blood plasma.
16. (d) Pseudopodium at its forward end gets its firm consistency by hyaline cap which is made of ectoplasm.

	***

 

(117)