CBSE Class 12 Biology Human Health and Disease MCQs Set 08

Question: Antigen binding site in an antibody is found between
a) two light chains
b) two heavy chains
c) one heavy and one light chain
d) either between two light chains or between one heavy and one light chain depending upon the nature of antigen
Answer: c

Question: An example of innate immunity is
a) PMNL – neutrophils
b) T-lymphocytes
c) B-lymphocytes
d) TH cells
Answer: a

Question: Which one of the following is the correct statement regarding the particular psychotropic drug specified?
a) morphine leads to delusions and disturbed emotions
b) barbiturates cause relaxation and temporary euphoria
c) has his alters thought, feelings, perceptions and hallucinations
d) opium stimulates nervous system and causes hallucinations
Answer: c

Question: Sedatives differ from tranquillizers in
a) sedatives induce sleep while tranquillizers do not do so
b) sedatives depress brain activity while tranquillizers activate brain functioning
c) sedatives are strong tranquillizers
d) sedatives cause addiction while tranquillizers do not produce such an effect
Answer: a

Question: AIDS disease was first reported in
a) Russia
b) USA
c) Germany
d) France
Answer: b

Question: Antigen binding site in an antibody is found between
a) two light chains
b) two heavy chains
c) one heavy and one light chain
d) either between two light chains or between one heavy and one light chain depending upon the nature of antigen
Answer: c

Question: In malaria, which of the following is released in blood to cause severe chill
a) hematin
b) haemozoin
c) haemoof-bin
d) haemolysin
Answer: b

Question: Which of the following organs is not involved in the generation of immune response?
a) brain
b) lymph nodes
c) spleen
d) thymus
Answer: a

Question: The major histocompatibility complex is a
a) series of complement-enhanced reactions to antigens
b) group of antigens, coded by a family of genes, on the surface of body cells
c) form of autoimmunity
d) the major cause of cancer
Answer: b

Question: Sporogony of malarial parasite occurs in
a) stomach wall of mosquito
b) salivary glands of mosquito
c) RBCs of man
d) liver of man
Answer: a

Question: If a person shows production of interferons in his body, the chances are that he has got an infection of
a) typhoid
b) influenza
c) tetanus
d) malaria
Answer: b

Question: Which cells of immune system causes pore formation at the surface of the plasma membrane?
a) helper cell
b) killer T-cell
c) suppressor T-cell
d) B-cell
Answer: b

Question: The major phagocytic cells are
a) lymphocytes
b) mast cells
c) plasma cells
d) macrophages
Answer: d

Question: Heroin is also known by the name
a) coke
b) crack
c) smack
d) hemp
Answer: c

Question: The tobacco products cause
a) aneurysm
b) polyarteritis nodosa
c) thromboangiitis obliterans
d) Wernicke’s syndrome
Answer: c

Question: An immune disease in which the body destroys the ill-functioning thyroid gland itself is
a) Simmond’s disease
b) myxoedema
c) Hashimoto’s disease
d) cretinism
Answer: c

Question: Perspiration, saliva and tears contain an enzyme, lysozyme, that kills
a) virus-infected cells
b) protozoa
c) bacteria
d) viruses
Answer: c

Question: Which one of the following statements is correct?
a) benign tumours show the property of metastasis
b) heroin accelerates body functions
c) malignant tumours may exhibit metastasis
d) patients who have undergone surgery are given cannabinoids to relieve pain
Answer: d

Question: Recognition and digestion by phagocytosis due to coated surface of antibodies is
a) opsonisation
b) immunization
c) T-cell immunization
d) B-cell immunization
Answer: a

Question: The virus that causes acquired immune deficiency syndrome (AIDS) parasitizes and reduces
a) B cells
b) cytotoxic T cells
c) helper T cells
d) All
Answer: c

Question: Which of the following combinations causes damage to gastric mucosa?
a) alcohol & vum
b) alcohol & barbiturate
c) alcohol & aspirin
d) alcohol & hashish
Answer: c

Question: Use of anti-histamines and steroids give a quick relief from
a) nausea
b) cough
c) headache
d) allergy
Answer: d

Question: A ‘drunk person’ has earliest effect on which part of the brain?
a) cerebrum
b) cerebellum
c) pons
d) medulla oblongata
Answer: a

Question: Allergic condition caused by pollen grains of certain flowers causing inflammation of the nose is called
a) laryngitis
b) rhinitis
c) pharyngitis
d) bronchitis
Answer: b

Question: An organism which has been used as a weapon in biological war causes which of the following disease?
a) malaria
b) common cold
c) influenza
d) anthrax
Answer: d

Question: An autoimmune disease is
a) myasthenia gravis
b) haemophilia
c) AIDS
d) None of the options
Answer: a

Question: Charas or hashish is obtained from
a) Leaves of Cannabis
b) Resinous secretion of flowering tops of female Cannabis
c) Dried leaves of female Cannabis
d) Resinous secretion from bark of male plants of Cannabis
Answer: b

Question: Fatty liver syndrome is due to
a) cigarette smoke
b) alcoholic drinks
c) opiate narcotics
d) psychedelic drugs
Answer: b

Question: Which one of the following options gives the correct matching of a disease with its causative organism and mode of infection?
a) Elephantiasis – Wuchereria bancrofti – With infected water and food
b) Malaria – Plasmodium vivax – Bite of male Anopheles mosquito
c) Typhoid – Salmonella typhi – With inspired air
d) Pneumonia – Streptococcus pneumoniae – Droplet infection
Answer: d

Question: Triple antigen vaccine is not used for
a) diphtheria
b) pertussis
c) typhoid
d) tetanus
Answer: c

Question: A certain patient is suspected to be suffering from Acquired Immuno Deficiency Syndrome. Which diagnostic technique will you recommend for its detection?
a) WIDAL
b) ELISA
c) MRI
d) Ultrasound
Answer: b

Question: Hypotensive tranquillizer drug reserpine is obtained from roots of
a) Ferule asafoetida
b) Rawolfia serpentina
c) Papaver somniferum
d) Curcuma longa
Answer: b

Question: Which of these following is not a bacterial disease of human?
a) Typhoid
b) Diptheria
c) Pneumonia
d) Dysentery
Answer: d

Question: Blood circulation was discovered by
a) Robert cook
b) William Harvey
c) T.H Morgan
d) None of these
Answer: b

Question: State the incorrect statement
a) Maintenance of hygienic food and water resources are necessary for achieving good health
b) When functioning of one or more organs or system of the body is adversely affected we are not healthy
c) Diseases which are easily transmitted from person to other are non – infectious disease
d) AIDS is an infectious disease
Answer: c

Question: Typhoid symptoms does not include
a) Sustained high fever
b) Stools with excess mucous and blood clots
c) Weakness
d) Headache
Answer: b

Question: Amoebiasis is caused by
a) Bacteria
b) Virus
c) Protozoa
d) Helminthes
Answer: c

Question: Yoga is good for
a) Physical health
b) Mental health
c) Both (a) and (b)
d) None of these
Answer: c

Question: Which of the following is a/are disease causing organism/s?
a) Bacteria
b) Fungi
c) Helminths
d) all of these
Answer: d

Question: Malarial parasite requires which of the following host to complete its life cycle
a) Human
b) Mosquito
c) House fly
d) Both (a) and (b)
Answer: d

Question: The pathogenic form of malarial parasite enters the human body through
a) Male anopheles mosquito bite
b) Contaminated food and water
c) Droplet discharged by the infected person while sneezing
d) None of these
Answer: d

Question: During malarial infection the cause of chills and high fever recurring every 3-4 days is due to
a) Liver infection by sporozoites
b) RBC infected by plasmodium
c) Haemozoin released by rupture of RBC during infection
d) None of these
Answer: c

Question: Typhoid is caused by
a) Streptococcus typhi
b) Salmonella typhi
c) Plasmodium
d) None of these
Answer: b

Question: Deficiencies with which a child is born and defects which the child inherits from parents from birth are known as?
a) Genetic disorders
b) Mental disorder
c) Speed disorder
d) None of these
Answer: a

Question: State the incorrect one
a) Health simply means absence of disease or physical fitness
b) Health is state of complete mental and social well being
c) Unhealthy people are less efficient at work
d) Health increases longevity of people
Answer: a

Question: Which of the following pathogen is responsible for pneumonia?
a) Plasmodium
b) Streptococcus pneumonia
c) Hemophilus influenzae
d) Both (b) and (c)
Answer: d

Question: In common cold which of the following body part is not affected
a) Nose
b) Lungs
c) Respiratory tract
d) All a,b,c is infected
Answer: b

Question: Which of the following is the symptom for pneumonia?
a) Sustained high fever
b) Problems in respiration
c) Mucus and blood in stools
d) Both (a) and (b)
Answer: d

Question: The pathogen for malaria
a) Plasmodium –bacteria
b) Plasmodium – virus
c) Plasmodium – Protozoan
d) None of these
Answer: c

Question: In liver the malarial parasite reproduces
a) Asexually producing gametocytes
b) Does not reproduce in liver
c) Asexually reproduces
d) None of these
Answer: c

Question: Which of the following factors do not affect the Hardy–Weinberg Principle?
a) Gene flow
b) Use and disuse of organs
c) Genetic drift
d) Natural selection
Answer: b

Question: Use of Cannabis products results in
(a) alteration in perception, thoughts and feelings
(b) depressed brain activity and feeling of calmness
(c) suppressed brain function and relief in pain
(d) stimulation of nervous system, increased alertness and activity.
a) heroin
b) alcohol
c) librium
d) morphine
Answer: d