PHYLUM NEMATODA

PHYLUM NEMATODA

1. Ascaris is an endoparasite in the .... of man

a. Colon b. Small intestine c. Lymph vessels d. Spleen

2. Sexes in Namatodes is distinguished by certain morphological variation. This phenomenon is

termed as

a. Polymorphism b. Alternation of generation c. Genetic variation

d. Sexual dimorphism

3. Female Ascaris differs from male in having

a. Long, stout body with a straight posterior end

b. Presence of separate gonopore and anus

c. Absence of penial setae d. All the above

4. Tube within a tube type of body plan is exhibited by the

a. Turbellarians b. Trematodes c. Cestodes d. Nematodes

5. The perivisceral cavity pseudocoelom because Nematodes is called

a. It is not derived by splitting of the mesodermal layer

b. It is not formed from the Archenteron

c. It has no mesodermal lining d. All the above

6. Pseudocoelomic type of body cavity is unique of only

a. Annelids b. Platyhelminthes c. Nematodes d. Only ‘a’ and ‘b’

7. Excretory system of Nematodes differ from the Platyhelminthes in having

a. Nocilia b. No fIame cells c. No branching tubules d. All the above

8. A roundworm resemble the flatworm in having all these characters except

a. Ingestion and ejection taking place at a common opening b. Longitudinal nerve cords

c. Absence of circulatory system d. Absence of respiratory system

9. All Roundworms differ from the Flatworms in having

a. Bilateral symmetry b. Three germ layers c. Presence of mesenchyme cells

d. False coelom

10.Pick out the correct statement.

a. Platyhelminthes and Nematodes have both the longitudinal and circular muscles

b. Platyhelminthes has both circular and longitudinal muscles, whereas Nematodes have only

longitudinal muscles

c. Platyhelminthes has circular and Nematodes have longitudinal muscles

d. Platyhelminthes has longitudinal and Nematodes have both longitudinal and

circular muscles.

11.Parasitic adaptations of the Ascaris are

a. Thick cuticle resistant to digestive juice of the host

b. Respiration taking place by breaking down of glycogen in the body of the parasite

c. Absence of defined respiratory, circulatory and locomotor systems d. All the above

12. Select the one without the syncystial epidermis.

a. Ancylostoma duodenale b. Ascaris lumbricoides c. Schistosoma heamotobium

d. Wuchereria bancrofti

13. The common intestinal roundworm is called

a. Taenia solium b. Ascaris lumbricoides c. Enterobius vermicularis

d. Trichinella spiralis

14. Syncystium in the Nematodes is the epidermis consisting of a sheet of protoplasm

a. Without nuclei

b.With nuclei and without cell boundaries

c. With nuclei and without cell boundaries

d. With a single nucleus

15. The disease caused by common intestinal roundworm is

a. Ascarias is b. Ancylostomiasis c. Elephantiasis d. None of these

16. Ascaris is not usually thrown out from the intestine because of its

a. Hard cuticle b. Selender form c. Ability to attach itself to the intestinal wall

d. Own undulating waves

17. Ascaris feeds on

a. Semi-digested food in the intestine b. Mucuous membrance of the intestine

c. Sucks tissue juices and blood of the intestine d. All the above

18. Triploblastic, bilaterally, symmetrical, vermiform, unsegmented pseudocoelomate metazoan

animals are

a. Platyhelminthes b. Annelids c. Nematodes d. Arthropods

19. Roundworms differ from the Flatworms in

a. Not having a coelom b. Having a true coelom c. Having a false coelom

d. None of these

20. Excretory system comprising of two lateral tubes, joining at the anterior end to open outside

is one that is found in

a. Panaria b. Fluke c. Tapeworm d. Ascaris

21. The male of Ascaris is distinguished from a female by the following feature except

a. The male is smaller and thinner than the female

b. The posterior end is curved with a cloacal opening

c. There are two penial setae d. All the above

22. Enterobiasis spreads by

a. Air and contamination b. Mosquito bite c. Uncooked pork d. Uncooked fish

23. The intermediate host for the spread of ascariasis is

a. Fly b. Mosquitoes c. Snail d. No intermediate host

24. Reproductive system of parasitic animals are usually

a. Less complex than that of free living animals

b. More complex than that of free living animals

c. Very similar to that of other animals

d. Disintegrated to some axtent

25. The extra intestinal migration of the embryo of Ascaris follows this path.

a. From intestine - mucous membrane - blood stream - liver- heart - lungs - trachea - throat -

oesophagus - back to the intestine

b. From intestine - liver - lungs - heart - blood stream -intestine

c. Intestine - pharynx - lungs - trachea - blood vessel heart - blood stream - stomach and back

to the intestine

d. From the stomach - oesophagus - lungs - blood stream -heart - blood stream - oesophagus-

intestine

26. Tansmission of Ascariasis is by

a. Flies b. Mosquitoes c. Contamination d. None of these

27. Obstructive jaundice is caused by Ascaris when they

a. Block the intestine b. Are found in large numbers c. Block the bile duct

d. Feed on pancreatic tissue

28. The embryos that are set free from the eggs of Ascaris in the intestine of man is known is

a. Rhabditiform larvae b. Cercaria c. Trochophore d. Miracidium

29. Pueumonia is usually caused when the larva of Ascaris is in the ..... in large numbers.

a. Lungs b. Throat c. Oesophagus d. Blood vessels

30. Ancylostoma duodenale is commonly known as the

a. Tapeworm b. Hookworm c. Roundworm d. Pin worm

31.The embryo of Ascaris takes about ..... days to attain maturity.

a. 10 b. 15 c. 25 d. 30

32.The disease caused by the hookworm is

a. Ascariasis b. Ancylostormiasis c. Filariasis d. Hepatitis

33. The common symptoms of the Ascaris infection is

a. Colic pain b. Indigestion c. Protuberant stomach d. All the above

34. A juvenile Nematode parasite which enters the human host by active penetration through

the skin is

a. Ascaris b. Wuchereria c. Ancylostoma d. Microfilaria

35.The male of a hookworm can easily be distinguished from the female because of its

a. Penial setae b. Copulatory bursa c. Hook d. Curved posterior tip

36.The pathological disorders caused by Hookworm are

a. Severe anaemia and intestinal disorder

b. Lung haemorrhage and pneumonia

c. Stomach pain and oesinophilia

d. All the above

37. Ground itch is caused by

a. Roundworm b. Pin worm c. Microfilaria d. Hookworm

38. Ancylostoma duodenale is a

a. Trematode b. Cestode c. Nematode d. Annelid

39. The juveniles of hookworm reaches the intestine by following this route

a. Penetrates the skin-blood-blood vessels - heart - lungs- trachea - pharynx intestine

b. Penetrate the skin- blood - blood vessels-intestine - lungs- heart- pharynx-intestine

c. ‘a’ and ‘b’ combined d. None of these

40.The common hookworm found in the intestine of man is

a. Ascaris lumbricoides b. Ancylostoma duodenale c. Enterobius vermicularis

d. Trichinella spiralis

41. The hookworms are provided with .... to puncture the body wall.

a. Cutting plates b. Dorsal lips c. Papillae d. Spines

42.The Hoomworm infection is hazardous to children maixly because it causes

a .Colic pain and palpitation of the heart b. Oesinophilia and weakness

c. Retardation of both merital and physical growth d. Pneumonia and lethargy

43.Adult Oxyuris lives in the neighbourhood of

a. Duodenum b. Caecum and appendix c. Liver and spleen d. Stomach

44. Elephantiasis occurs in organs like

a. Heart b. Liver and Spleen c. Arms and legs d. None of these

45. Oxyuris larve just out of the egg takes ......... months develop.

a. 2 b. 3 c. 4 d. 1

46. The general pathological symptoms of Elephantiasis is

a. Chill b. Fever c. Aches d. All the above

47. ..... does not involve two different animals to complete its life cycle.

a. Ascaris b. Schistosoma c. Taenia d. Fasciola

48. Microfilariae usually appears in the

a. Lymphatic vessels b. Stomach c. Blood of large vessels d. Heart

49. Unique characteristic of male pinworm is that

a. They are less than half of the size of females

b. They were curved tailed with a single copulatory spicule

c. Male dies soon after mating d. All the above

50. Elephantiasis (Filariasis) is a common disease in

a. Sub tropical countries b. Tropical and sub epical countries

c. Polar region only d. Tropical countries only



ANSWERS

1.b 2. d 3. d 4. d 5. d 6. c 7. d 8. a 9. d 10. b

11.d 12. c 13. b 14. c 15. a 16. d 17. d 18. c 19. c 20. d

21.d 22. a 23. d 24. b 25. a 26. c 27. c 28. a 29. a 30. b

31.c 32. b 33. d 34. c 35. b 36. d 37. d 38. c 39. a 40. b

41.a 42. c 43. b 44. c 45. a 46. d 47. a 48. c 49. d 50. b