CBSE Questions for Class 12 Medical Biology Human Health And Disease Quiz 3 - MCQExams.com

Everytime, when the dosage of a drug has to be increased to achieve the same 'kick' that initially occurred in response to a smaller dose, this condition is known as ...
  • Rebound effect
  • Tolerance
  • Withdrawal symptoms
  • Addiction
Filaria germ is a kind of
  • Bacteria
  • Helminthes
  • Mosquito
  • Protozoa
Infection caused by the Culex mosquito bite is
  • Filariasis
  • Dengue fever
  • Yellow fever
  • Pneumonia
Infection of Ascaris usually occurs by
  • Imperfectly cooked pork
  • Tsetse fly
  • Mosquito bite
  • Contaminated water and vegetables
Which of the following is a helminth disease?
  • Diphtheria
  • Filariasis
  • Polio
  • None of the above
Chenopodium oil is used in
  • Tuberculosis
  • Typhoid
  • Ascariasis
  • Small pox
Filarial larva can be collected from man's 
  • Smears of intestinal contents
  • Peripheral blood
  • Smears of spleen
  • Biopsy of liver
The genes responsible for cancer are 
  • Cancer genes
  • Carcino genes
  • Carcinomas
  • Oncogenes
The study of worms which cause parasitic infestations in man is 
  • Helminthology
  • Herpetology
  • Ichthyology
  • Malacology
Which one spreads filaria?
  • Housefly
  • Bed bug
  • Mosquito
  • Flea
Wuchereria bancrofti is transmitted by
  • Sandfly
  • Tsetse fly
  • Anopheles mosquito
  • Culex
Filariasis is also called elephantiasis because
  • Body parts swell
  • It is caused by elephant
  • It is caused by Ascaris
  • It is caused by Entamoeba
Cancer is
  • Uncontrolled growth of tissues
  • Non-malignant tumor
  • Controlled division of tissues
  • None of the above
Which of the following pairs is correct?
  • Housefly - Yellow fever
  • Bed bug - Kala azar
  • Sandfly - Amoebic dysentry
  • Culex - Filariasis
Filariasis is caused by
  • Dead adult filariae
  • Microfilariae
  • Biting of filarial worm
  • Presence of bacteria in filarial wall
Filaria is transmitted by
  • Male anopheles
  • Male culex
  • Female anopheles
  • Female culex
Elephantiasis in man is caused by ____________.
  • Ancylostoma duodenale
  • Ascaris lumbricoides
  • Dracunculus medinensis
  • Wuchereria bancrofti
Which one of the following does not follow the central dogma of molecular biology
  • HIV
  • Pea
  • Mucor
  • Chlamydomonas
Oncogenes were discovered by
  • S.B. Prussiner
  • F.P. Rous
  • A. Fleming
  • J.M. Bishop and H.E. Varmus
.............. is/are the characteristics of cancer cells.
  • Uncontrolled growth
  • Invasion of local tissue
  • Spreading to other body parts
  • All of the above
Bhang, Ganja, and Hashish (Charas) are obtained from
  • Rauwolfia
  • Calotropis
  • Cannabis sativa
  • Withania
Drugs which induce dreamy state of consciousness is ______________.
  • Sedative
  • Stimulant
  • Depressant
  • Hallucinogen
Which is not cancer?
  • Leukaemia
  • Glaucoma
  • Carcinoma
  • Sarcoma
The vector of 'break bone fever' is
  • Culex
  • Aedes
  • Anopheles
  • None of these
Benzodiazepine is an
  • Antidepressant
  • Antipsychotic
  • Antianxiety drug
  • None of the above
Use of antihistamines and steroids give a quick relief from
  • Allergy
  • Nausea
  • Cough
  • Headache
Marijuana is extracted from
  • Dried leaves and flowers of hemp plant
  • Ergot fungus
  • Cocoa plant
  • None of the above

Assertion :Nicotine is an alkaloid found in tobacco.

Reason :It has several uses.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Which of the following is an opiate narcotic?
  • Barbiturates
  • Morphine
  • Amphetamines
  • LSD
Ingestion of marijuana leads to illusions and alters the thoughts, feelings and perceptions of a person. Marijuana is a
  • Narcotic
  • Stimulant
  • Hallucinogen
  • Sedative
Which of the following, stimulates the heart?
  • Mescaline
  • Epinephrine
  • LSD
  • Hashish

Assertion: Charas is a psychoactive drug.

Reason: Charas contains THC of 25 to 60%.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Hallucinogens
  • Are nerve depressants
  • Are nerve stimulants
  • Alter thoughts, feelings and perceptions
  • Are pain relievers

Assertion : Myasthenia gravis is an autoimmune disease.

Reason : Immune system rejects the transplant muscles.
  • Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion.
  • Both the Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
  • The Assertion is true but the Reason is false.
  • Both the Assertion and Reason is false.
  • The Assertion is false but Reason is true.
Which of following is a hallucinogen?
  • Lysergic acid diethylamide
  • Psilocybin
  • Mescaline
  • All of the above
Classify the following organism based on the absence/presence of true coelom.
Ascaris
  • Pseudocoelomate
  • Coelomate
  • Acoelomate
  • Both A and B
.......... is defined as physical, mental and social well-being and comfort.
  • Health
  • Disease
  • Fit
  • All of the above
............. are known to have pseudocoelom.
  • Nematodes
  • Mammals
  • Aves
  • None of these
Classify the following organism based on the absence/presence of true coelom.
Wuchereria
  • Pseudocoelomate
  • Acoelomate
  • Coelomate
  • All of the above
Which of the following can make you ill, if you come in contact with an infected person?
  • High blood pressure
  • Genetic abnormalities
  • Sneezing
  • Blood cancer
Which of the following is not an aquatic animal?
  • Hydra
  • Jelly fish
  • Coral
  • Roundworm
Which of the following is not a nematode?
  • Tapeworm
  • Hookworm
  • Liverfluke
  • Both A and C
A pseudocoel is found in:
  • Ascaris (roundworm)
  • Taenia (tapeworm)
  • Fasciola (liver fluke)
  • Pheretima (earthworm)
Being healthy means
  • Free of infection by pathogen
  • Tension free mental status
  • Living in polluted environment
  • Both A and B
The Human Immunodeficiency Virus (HIV) can cause the disease AIDS. The HIV infects lymphocytes, the T-cells, that help in the production of antibodies. The following graph shows how the concentrations of HIV, T-cells, and antibodies against HIV develop in time in an untreated AIDS patient.
In the above graph, the lines marked (i), (ii) and (iii), respectively, represent



79446.jpg
  • HIV, T-cells and antibodies.
  • T-cells, HIV and antibodies.
  • T-cells, antibodies and HIV.
  • Antibodies, T-cells and HIV.
Health is ___________.
  • Weight of body according to height
  • Absence of disease or infirmity
  • State of complete physical, mental and social well being
  • None of these
Ascaris belongs to the phylum _____________.
  • Porifera
  • Nematoda
  • Annelida
  • Arthropoda
Disease caused by Ascaris 
  • Is called as ascariasis
  • Results in extensive haemorrhage
  • Is indicated by high temperature, anaemia, leucocytosis and eosinophilia
  • All of the above
Aspergillosis is caused by a
  • Virus
  • Bacteria
  • Fungi
  • Mycoplasma
Ascaris lumbricoides infects in 
  • Human blood
  • Intestine of man
  • Lungs only
  • All of the above
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Practice Class 12 Medical Biology Quiz Questions and Answers