CBSE Questions for Class 12 Medical Biology Human Health And Disease Quiz 14 - MCQExams.com

Which one of the following statements about certain given animals is correct?
  • Flat worms (platyhelminthes) are coelomates.
  • Round worms (aschelminthes) are psuedocoelomates.
  • Molluscs are acoelomates.
  • Insects are pseudocoelomates.
Alcopar is the most effective drug for
  • Plasmodium
  • Schistosomiasis
  • Taeniasis
  • Filariasis
Cyclosporin A, an immunosuppressive drug is produced by
  • Aspergillus niger
  • Monascus purpureus
  • Penicillium notatum
  • Trichoderma polysporum
Where can the female genital pore in Ascaris be found?
  • In the middle part of body
  • About $$1/3^{rd}$$ from anterior end
  • About $$1/3^{rd}$$ from posterior end
  • At the posterior terminal end
Children suffering from the infection of Ascaris exhibit stunted growth, because 
  • They don't eat well.
  • A substance produced by Ascaris combines with trypsin in the host, causing interference with protein utilization.
  • All the proteins of the host are used up by Ascaris.
  • Acute hormonal disturbance are caused by toxins of Ascaris
The roundworm, Ascaris, can be called as specialized and not degenerate (with reference to parasitism) because 
  • It is dioecious.
  • Respiratory organs absent.
  • It has an uncoiled alimentary canal.
  • Cuticle over the body wall is resistant to the host's digestive juices.
The musculature in the body wall of Ascaris comprises of
  • Circular muscles only
  • Longitudinal muscles only
  • Outer longitudinal and inner circular muscles
  • Outer circular and inner longitudinal muscles
The body organization in nematode is: 
  • Cellular grade
  • Cell-tissue grade
  • Tissue grade
  • Organ system grade
Ascaris lumbricoides produces some toxins in the body of the host which disturbs
  • Basal metabolic rate
  • Fat metabolism
  • Protein metabolism
  • Carbohydrate metabolism
In Ascaris, median rachis is present in 
  • Urethra
  • Oviduct
  • Ovary
  • Uterus
Infective stage of Ascaris remain viable for
  • Six months
  • Six years
  • Six days
  • Six hours
The thin layer of epidermis having scattered nuclei and no partition walls below the cuticle of Ascaris is known as
  • Multinucleated epidermis
  • Aseptate
  • Coenocytic epidermis
  • Syncytial epidermis
How many epidermial cords are found in Ascaris?
  • Two
  • Four
  • Six
  • Eight
Subsequent to fertilization an egg of Ascaris undergoes to profound changes, which involve 
  • Migration of glycogenic globules to the surface and formation of lipid layer, below the shell
  • Formation of thick and chitinous shell
  • Receiving a coat of albuminous material via the secretions elaborated by uterine cells
  • All of the above
Copulation in Ascaris takes place in
  • Small intestine of host
  • Rectum of host
  • Stomach of host
  • Outside the body of host
Juvenile Ascaris becomes adult 
  • After 4th moult
  • As it reaches lungs
  • After 3rd moult in blood capillaries of lungs
  • After 4-6 days of free living existence
The larva of Ascaris circulate in the body through the following course
  • Alimentary canal, heart, liver, lungs, trachea, mouth, alimentary canal
  • Alimentary canal, liver, heart, lungs, trachea, pharynx, alimentary canal
  • Alimentary canal, heart, lungs, trachea, intestine
  • None of the above
During growth Ascaris undergoes moulting in the body of host for 
  • Two times
  • Six times
  • Five times
  • Four times
Second maturation division of ova in Ascaris occurs 
  • As the ova migrate from the proliferation to maturation zone.
  • After fertilization.
  • After deposition of sperms in vagina.
  • None of the above.
The number of eggs produced daily by mature female Ascaris are 
  • 10,000
  • 20,000
  • 100,000
  • 200,000
Infection of Ascaris can be diagnosed by 
  • Examining stool for Ascaris eggs
  • Making blood test
  • Urine test
  • Estimating total proteins
The name given to the condition of testis in Ascaris is
  • Monorchid
  • Diarchic
  • Triorchic
  • Tetrarchic
In Ascaris, the lumen of pharynx is 
  • Circular
  • Square
  • Triradiate
  • Oval
This is the life cycle of Ascaris. Fill in the gaps between A to G mentioning the events at that stage.

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  • A. First moult occurs,
    B. Develops into rhabditiform (second larval stage)
    C. Larva hatches out in intestine
    D. Through the pulmonary artery reaches the lungs
    E. Travels through hepatic portal system
    F. Fourth stage juvenile larva travels from alveoli, bronchioles and finally to the trachea
    G. Fourth (final) moult occurs in intestine
  • A. First moult occurs
    B. Travels through hepatic portal system
    C. Larva hatches out in intestine
    D. Develops into rhabditiform (second larval stage)
    E. Through the pulmonary artery reaches the lungs
    F. Fourth stage juvenile larva travels from alveoli, bronchioles and finally to the trachea
    G Fourth (final) moult occurs in intestine
  • A. First moult occurs
    B. Develops into rhabditiform (second larval stage)
    C. Travels through hepatic portal system,
    D. Larva hatches out in intestine
    E. Through the pulmonary artery reaches the lungs
    F. Fourth stage juvenile larva travels from alveoli
    bronchioles, bronchus and finally to the trachea
    G. Fourth (final) moult occurs in intestine
  • A. First moult occurs
    B. Develops into rhabditiform (second larval stage)
    C. Larva hatches out in intestine
    D. Travels through hepatic portal system
    E. Through the pulmonary artery reaches the lungs
    F. Fourth stage juvenile larva travels from alveoli, bronchioles and finally to the trachea
    G. Fourth (final) moult occurs in intestine
The disease root-knot of brinjal is caused by
  • Fusarium udum
  • Phytophthora infestans
  • Meloidogyne incognita
  • Pseudomonas rubrilineans
  • Xanthomonas citri
Eyeworm is 
  • Trichinella
  • Loa loa
  • Wuchereria
  • Ancylostoma
Strongyliform larva can be treated in life cycle of 
  • Ascaris
  • Dracunculus
  • Ancylostoma
  • Wuchereria
The larva that shows nocturnal periodicity is :
  • Rhabditiform larva.
  • Micorfilaria.
  • Muller's larva.
  • None of the above.
Which one of the following nematode that causes blisters on the limbs and its secondary host is cyclops?
  • Schistosoma
  • Opisthorchis
  • Dracunculus
  • Trichuris
Ascaris is characterised by 
  • Absence of true coelom but presence of metamerism
  • Presence of neither true coelom nor metamerism
  • Presence of true coelom but absence of metamerism
  • Presence of true coelom and metamerism
Pick up the incorrect match of causative agent/vector and disease related to it:
  • Anopheles - Malaria
  • Leishmania - Chagas disease
  • Glossina - Sleeping sickness
  • Wuchereria - Filariasis
Nematode parasite in human lymph glands is 
  • Ascaris lumbricoides
  • Enterobius vermicularis
  • Wuchereria bancrofti
  • None of the above
How many number of muscle cells are there in each longitudinal strip of the body wall of Ascaris?
  • 100
  • 150
  • 200
  • 300
Match list I with list II and choose the correct option.
     List I
      List II
A. Whipworm
I. Dracunculus
B. Pinworm
II. Ancylostoma
C. Guineaworm
III. Enterobius
D. Hookworm
IV. Trichuris
  • A- IV, B- III, C- I, D- II
  • A- III, B- IV, C- I, D- II
  • A- III, B- II, C- I, D- IV
  • A- IV, B- I, C- II, D- III
Exposure to ................ is one of the reasons for Prostate cancer.
  • Hydrocarbons
  • Cadmium oxide
  • Methane gas
  • Strontium compound
Priapulus, a member of Priapulida is 
  • Monoecious
  • Dioecious
  • Bisexual
  • All of the above
Purgative to expel Ascaris is 
  • Oil of Chenopodium
  • Tetrachlorethylene
  • Hexylresorcinol
  • All of the above
Diatome is mainly food of 
  • Rotifers
  • Acanthocephalans
  • Kinorhyncha
  • Loricifera
Rotifers produce 
  • Diploid amictic eggs
  • Haploid mictic eggs
  • Both A and B
  • None of the above
The excretory organs of Gastrotricha are
  • Protonephridia
  • Solenocytes
  • Renette cell
  • Both A and B
In heavy smokers, the alveoli of the lungs are enlarged and damaged reducing the surface area for the exchange of respiratory gases. This condition is called:
  • Asthma
  • Silicosis
  • Emphysema
  • Anosmia
At present, animal cell culture technology is extensively used for the production of 
  • Chylomicrons
  • Antibiotics
  • Vaccines
  • Edible proteins
The term 'Oncogene' is associated with
  • Genetic engineering
  • Tissue culture
  • Gene library
  • Cancer
Ascaris  is:
  • Radially symmetrical
  • Bilaterally symmetrical
  • Asymmetrical
  • None of the above
Filaria worm is
  • Trichuris
  • Wuchereria bancrofti
  • Ascaris lumbricoides
  • Ancylostoma
The most common confirmatory test used to diagnose AIDS is
  • ELISA
  • Western blot
  • PCR
  • None of the above
Which of the following, endoparasite of man is viviparous?
  • Ascaris
  • Wuchereria
  • Dracunculus
  • Both B and C
Which of the following is mismatched?
  • Trichuris - whipworm
  • Loa loa - eyeworm
  • Ancylostoma - pinworm
  • Ascaris - roundworm
Which of the following nematodes parasite were first discovered?
  • Amcylostoma duodenale
  • Enterobius vermicularis
  • Ascaris lumbricoides
  • Dracunculus medinensis
Which of the following shows the sexual dimorphism?
  • Hydra and Ascaris
  • Hydra and Oryctolagus
  • Ascaris and Pheretima
  • Ascaris and Oryctolagus
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