CBSE Questions for Class 12 Medical Biology Human Health And Disease Quiz 10 - MCQExams.com

In humans, elephantiasis is caused by.
  • Ascaris lumbricoides
  • Dracunculus medinensis
  • Wuchereria bancrofti
  • Ancylostoma duodenale
Ascaris has three lips which are positioned as
  • One median dorsal and two ventrolateral
  • All dorsal
  • Two lateral and one ventral
  • Two dorso-lateral and one median ventral
Which one is used in treatment of ascariasis?
  • Chenopodium oil
  • Paludrin
  • Terranmycin
  • None of the above
Filaria is transmitted through$$/$$secondary host of Wuchereria is?
  • Anopheles
  • Culex
  • Tse-tse-fly
  • Sandfly
Ascaris lumbricoides is
  • Hermaphrodite
  • Sexually dimorphic
  • Polymorphic
  • Sexually undifferentiated
Which of the following penetrates through skin and enters the intestine?
  • Ascaris
  • Tapeworm
  • Hookworm
  • Entamoeba
Microfilaria occurs in peripheral blood of human beings during.
  • Morning
  • Evening
  • Night
  • Day time
Wuchereria bancrofti belongs to phylum
  • Nemathelminthes
  • Platyhelminthes
  • Nematoda
  • Coelenterata
Abnormalities in host associated with Wuchereria, Plasmodium, and Fasciola 
(a) Parasitic castration
(b) Hyperplasia
(c) Febrile paroxysm
(d) Peritonitis
(e) Lymphangitis
The correct match respectively is
  • e, c, b
  • e, c, d
  • b, d, e
  • c, d, b
Filariasis is due to infection of.
  • Nematode worm$$/$$Helminth
  • Leech
  • Bed Bug
  • Flea
Ascaris infection is common in.
  • Men
  • Women
  • Children
  • Both A and B
Elephantiasis is caused by a member of.
  • Aschelminthes
  • Platyhelminthes
  • Annelida
  • Arthropoda
In India, filariasis is transmitted by.
  • Culex fatigens
  • Anopheles culicifacies
  • Musca domestica
  • Aedes aegypti
Which of the following phylum consists of psuedocoelom?
  • Echinoderms
  • Molluscs
  • Aschelminthes$$/$$Nematodes
  • Annelids
Filariasis is also called elephantiasis as.
  • It is caused by Ascaris
  • It is caused by Elephant
  • It is caused by Entamoeba
  • Body parts swell
Identify the phylum from the statements given below: 
(i) Their body has circular cross section.
(ii) They may be free-living, aquatic or terrestrial.
(iii) They are parasitic in plants and animals.
(iv) They are bilaterally symmetrical, triploblastic and pseudocoelomate.
  • Cnidaria
  • Aschelminthes
  • Annelida
  • Arthropoda
  • Platyhelminthes
A free-living roundworm which can cause serious autoinfection in human beings is_______________.
  • Rhabditis
  • Spongyloides
  • Loa
  • Necator
Which of the following is the infective stage of Ancylostoma$$/$$Hookworm?
  • Rhabditiform larva
  • Filariform larva
  • Microfilaria
  • Muller's larva
A parasitic disease which is not transmitted through the bite of an insect is?
  • Filariasis
  • Leishmaniasis
  • Malaria
  • Ascariasis
$$Ascaris$$ is characterised by:
  • Presence of true coelom but absence of segmentation
  • Presence of neither true coelom nor segmentation
  • Presence of true coelom but segmentation
  • Absence of true coelom but presence of segmentation
Which is not correctly matched?
  • Ascaris- Flame cell
  • Star fish- Radial symmetry
  • Prawn- Haemocoel
  • Sycon- Canal system
Which of the following is also known as hookworm?
  • Ancylostoma
  • Enterobius
  • Rhabditis
  • Ascaris
Protonephridia possesses______________.
  • Straight tube
  • Flame cell
  • Solenocyte
  • Ostiole
After liberation of juveniles, the female Dracunculus_______________.
  • Moves back into body cavity
  • Copulates again
  • Both A and B
  • Dies
Macrophages are
  • Short lived
  • With life span longer than most leucocytes
  • Lymphocytes
  • A type of neutrophils
The anterior V-spot in Wuchereria represents
  • Nerve ring
  • Cervical papilla
  • Excretory system
  • Reproductive system
Which one of the following is devoid of macrophages?
  • Lymph nodes
  • Connective tissue
  • Lungs
  • None of the above
Which of the following annelid is dioecious?
  • Pheretima
  • Eisenia
  • Nereis
  • Lumbricus
Which of the following gland of Ancylostoma duodenale secrete an anticoagulant?
  • Pharyngeal gland
  • Salivary gland
  • Cephalic gland
  • Hepatic gland
In Trichinella, juveniles are liberated in the following organ of host
  • Liver
  • Colon
  • Lungs
  • Intestine
Match and find the correct answer.
        $$I$$            $$II$$
$$(a)$$Stomochord$$(i)$$Hirudinaria
$$(b)$$Botryoidal tissue$$(ii)$$Dentalium
$$(c)$$Captacula$$(iii)$$Balanglossus
$$(d)$$Rhabdites$$(iv)$$Dugesia
$$(v)$$Pinctada
  • $$a - iii, b - ii, c - v, d - i$$
  • $$a - i, b - ii, c - iv, d - iii$$
  • $$a - iii, b - i, c - ii, d - iv$$
  • $$a - i, b - iii, c - ii, d - v$$
Third stage larva of Wuchereria bancrofti carried by Culex mosquito is called
  • Cysticercus
  • Merozoite
  • Microfilariae
  • Trophozoite
Ascaris is a worm with
  • Segmented body
  • Unsegmented body
  • Flat body
  • All of the above
Adults of Wuchereria bancrofti attacks
  • Excretory system
  • Nervous system
  • Blood circulation
  • Lymph vessels
Syncytial epidermis is found in 
  • Earthworm
  • Ascaris
  • Hydra
  • Starfish
Which disease is spread by activation of oncogenes?
  • Cholera
  • TB
  • Cancer
  • Viral flu
HIV virus contains 
  • RNA with protein
  • DNA with protein
  • DNA without protein
  • DNA only
Which of the following is an autoimmune disease?
  • Grave's disease
  • Typhoid
  • Hodgekin's disease
  • Asthma
Auxetic growth is characterised by
  • Increase in cell number
  • Growth without increase in cell number
  • Both increase in cell number and cell growth
  • Expansion in transverse direction
Auxetic growth occurs in
  • Human beings
  • Frog
  • Nematodes
  • Lizards
When growth taken place only by increase in volume of existing cells, it is called
  • Auxetic growth
  • Multiplicative growth
  • Accretionary growth
  • Differential growth
Marijuana is extracted from
  • Dried leaves and flowers of hemp plant
  • Ergot fungus
  • Roots of hemp plant
  • Cocoa plant
Use of Cannabis products results in
  • Alteration in perception, thoughts and feelings
  • Depressed brain activity and feeling of calmness
  • Suppressed brain function and relief in pain
  • Stimulation of nervous system, increased alertness and activity
Hashish and Ganja are obtained from
  • Erythroxylon
  • Nicotiana
  • Papaver
  • Cannabis

With reference to Cannabis which is correct X,Y and Z?
Statement X: Flowers are attractive and produce scent.
Statement Y: Pollen grains are small, dry and light.
Statement Z: Cannabis is wind pollinated plant.

  • X and Y are wrong, Z is independent of X and Y
  • X is wrong, Y is correct and Z is correct reason for Y
  • X is correct, Y is wrong and Z is correct reason for X
  • Both X and Y are correct, Z is correct reason for Y
Common roundworm infecting human beings is 
  • Ascaris lumbricoides
  • Enterobius vermicularis
  • Ankylostoma duodenale
  • Wuchereria bancrofti
Which one of the following does not follow central dogma of molecular biology
  • Mucor
  • Chlamydomonas
  • HIV
  • Pea
Charas of hasish is obtained from
  • Leaves of Cannabis
  • Resinuous secretion of flowering tops of female Cannabis
  • Dried leaves of female Cannabis
  • Resinuous secretion from bark of male plants of Cannabis
Tapeworm occurs inside 
  • Rectum
  • Stomach
  • Intestine
  • Liver
Tapeworm is attached to the intestinal wall by means of 
  • Strobila
  • Hooks and suckers present on scolex
  • Rostellum alone
  • Suckers alone
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