MCQ Questions Chapter 8 Human Health and Diseases Class 12 Biology

Please refer to MCQ Questions Chapter 8 Human Health and Diseases Class 12 Biology with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 12 Biology issued for the current academic year. We have provided MCQ Questions for Class 12 Biology for all chapters on our website. Students should learn the objective based questions for Chapter 8 Human Health and Diseases in Class 12 Biology provided below to get more marks in exams.

Chapter 8 Human Health and Diseases MCQ Questions

Please refer to the following Chapter 8 Human Health and Diseases MCQ Questions Class 12 Biology with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 8 Human Health and Diseases Class 12 Biology

Question- Which of the following is not a carcinogen?
(a) X rays and UV rays
(b) Oncogenic virus
(c) Protooncogene
(d) All of these are carcinogen

Question. State the incorrect statement
(a) Cancer detection is based on biopsy and histopathological studies of the tissue
(b) Blood and bone marrow tests for increased cell counts in the case of leukemias
(c) Computed tomography uses gamma rays to generate a three dimensional image of the internals of an object
(d) MRI uses strong magnetic fields and non- ionizing radiation to accurately detect pathological changes in the living tissue

Question. CO₂ is transported as :
(a) dissolved in blood plasma
(b) as bicarbonate
(c) in carbaminohaemoglobin
(d) All of the above

Question. Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is:
(a) Inefficient system of ventilation with little of residual air 
(b) Inefficient system of ventilation with high percentage of residual air
(c) An efficient system of ventilation with no residual air
(d) An efficient system of ventilation with little residual air

Question. Carbon dioxide amount in atmosphere is : 
(a) 3%
(b) 0.3%
(c) 0.04%
(d) 40%

Question. Gaseous exchange between blood and alveolar air across respiratory membrane occurs by : 
(a) Osmosis
(b) Diffusion
(c) active transport
(d) Phagocytosis

Question. Haem of the haemoglobin molecule is called its : 
(a) apoenzyme
(b) prosthetic group
(c) inorganic factor
(d) co-enzyme

Question. Which is the correct sequence of the air passage in man? 
(a) Nasal cavity → pharynx → trachea →larynx → bronchi → bronchioles → alveoli
(b) Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles → alveoli
(c) Nasal cavity → larynx → pharynx → trachea → bronchi → bronchioles → alveoli
(d) Nasal cavity → larynx → bronchi → pharynx → trachea → bronchioles → alveoli

Question. The movement of chloride ions into erythrocytes from the plasma to maintain osmotic balance during transport of gases is known as 
(a) Chlorination
(b) Hamburger phenomenon
(c) Bicarbonates shift
(d) Carbon dioxide transport

Question. The area of inner suface of bronchiole is 
(a) 1 m²
(b) 10 m²
(c) 100 m²
(d) 1000 m²

Question. Disease aggravated by pollution is
(a) haemophilia
(b) rheumatism
(c) scurvy
(d) bronchitis

Question. When a sea diver goes very deep he has to breathe on compressed air at high preseure. After sometime, he loses his strength of work and fell drowsy. This is because of 
(a) Compressed air
(b) More caron dioxide diffusing into tissues
(c) More nitrogen diffusing in blood and body fats
(d) nervous system does not work properly

Question. Floating ribs of thoracic cage are 
(a) 1^st to 7^th pair
(b) 8^th to 9^th pair
(c) 8^th to 10^th pair
(d) 11^th to 12^th pair

Question. When some food particle enters the windpipe instead of oesophagus it is expelled by the process of :
(a) Sneezing
(b) Coughing
(c) Yawning
(d) Hiccuping 

Question- Cancer patients are given what subtances which activate the immune system?
(a) Lymphokine
(b) Alpha-interferon
(c) Lymphocytes
(d) None of these

Question- Chemical name of heroin or smack is
(a) Triacetyl morphine
(b) Diacetyl morphine
(c) Dimethyl morphine
(d) Dihydroxy morphine

Question- Morphine is obtained from which plant
(a) Pisum sativum
(b) Magnifera indica
(c) Termanialia arjuna
(d) Papaver somniferum

Question- Cannabinoid receptors are present in
(a) Lungs
(b) GIT
(c) Brain
(d) None of these

Question- Which of the following is not made by cannabis plant?
(a) Opioid
(b) Ganja
(c) Charas
(d) Hashish

Question- Cannabinoids affect which organ system of the body
(a) Respiratory system
(b) Excretory system
(c) Cardiovascular system
(d) None of these

Question- Cocaine is obtained from which plant?
(a) Papaver somniferum
(b) Cannabis sativa
(c) Erythroxylum coca
(d) Atropa belladona

Question- Lysergic acid diethyl amide drugs are used to treat
(a) Cardiovascular disease
(b) Renal diseases
(c) Respiratory diseases
(d) Mental illness

Question- Nicotine stimulates which gland of the body
(a) Pituitary gland
(b) Thyroid gland
(c) Adrenal gland
(d) Prostate gland

Question- Cirrhosis is a disease of
(a) Lungs
(b) Liver
(c) Brain
(d) Heart

Question– Which of the following constitutes mucosa associated lymphoid tissue?
(a) Spleen
(b) Lining of respiratory, digestive and urogenital tract
(c) Lymph nodes
(d) None of these

Question– Syndrome means
(a) Disease
(b) Fever
(c) Group of symptoms
(d) None of these

Question– AIDS is caused by
(a) Haploid immuno deficiency virus
(b) Human immuno deficiency virus
(c) Host immune deficiency virus
(d) None of these

Question– HIV does not spread through
(a) Children born to an HIV infected mother
(b) By sharing infected needle
(c) Touching infected person
(d) None of these

Question– HIV genetic material gets incorporated in host genome after the process of
(a) Transcription
(b) Replication
(c) Both (a) and (b)
(d) Reverse transcription

Question– AIDS infection is characterized, by
(a) Depletion of T lymphocytes
(b) Increase of T lymphocytes
(c) Depletion of B lymphocytes
(d) Increase of B lymphocytes

Question– A widely used diagnostic test for AIDS is
(a) TLC
(b) SG PT /SGOT
(c) Widal test
(d) ELISA

Question– State the correct statement
A. Cancer is one of the most dreaded disease of human beings and is a major cause of death all over globe
B. In our body, cell growth and differentiation is highly controlled and regulated
C. In cancer cells, there is breakdown of these regulatory mechanism
D. Cancer cells show a property called contact inhibition
Options :
(a) A, B, D are true
(b) All are true
(c) B, C, D are true
(d) A, B, C are true

Question– Which tumors remain localized and do not spread to the other parts?
(a) Malignant tumor
(b) Benign tumor
(c) Both (a) and (b)
(d) None of these

Question- Carcinogen are
(a) Physical agents
(b) Chemical agents
(c) Biological agents
(d) All of them

Question- A cell-coded protein that is formed in response to infection with most animal viruses is called
(a) interferon
(b) antigen
(c) histone
(d) antibody

Question- The letter T in T-lymphocyte refers to :
(a) thymus
(b) thyroid
(c) thalamus
(d) tonsil

Question- Passive immunity is defined as immunity
(a) inherited from the parents.
(b) achieved through vaccination.
(c) acquired through first exposure to the disease.
(d) achieved through the sera of other animals enriched in antibodies.

Question- Short -lived immunity acquired from mother to foetus across placenta or through mother’s milk to the infant, is categorized as
(a) active immunity
(b) passive immunity
(c) cellular immunity
(d) innate non-specific immunity

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.

Question- Resistance in body against diseases is given by
(a) vaccinations
(b) histamine
(c) immunoglobulins
(d) antigens

Question- Which of the following results in fever when released in body during disease ?
(a) Pyrogens
(b) Antibodies
(c) Interferons
(d) Interleukins

Question- When a quick immune response is required due to infection of a deadly microbe, the patient is injected with
(a) protein of pathogen
(b) inactivated or weakened pathogen
(c) preformed antibodies
(d) vaccine

Question- B-lymphocytes are associated with
(a) humoral immunity
(b) production of heparin
(c) cell mediated immunity
(d) internal cleansing

Question- Which of the following is trapped in the lymph nodes and responsible for the activation of lymphocytes present there and cause the immune response?
(a) Antigen
(b) Antibody
(c) Pathogen
(d) Lymph fluid

Question- Hepatitis B and AIDS are
(a) caused by Retro-viruses.
(b) transmitted through sexual contact.
(c) congenital diseases.
(d) transmitted through infected blood.

Question- The cell in the human body invaded by the human immunodeficiency virus (HIV) is
(a) B – cell
(b) macrophage
(c) erythrocyte
(d) T- helper cell

Question- Lymphocytes that inhibit the development and proliferation of T and B cell are
(a) supressor B cells
(b) suppressor! cells
(c) macrophages
(d) neutrophils

Question- Caffeine can be obtained from
(a) Thea sinensis
(b) Coffea arabica
(c) Theobroma cacao
(d) all of these

Question- An allergic reaction is initiated by antibodies of the
(a) igGgroup
(b) iglvl group
(c) igA group
(d) igE group

Question- A person is drug addict because of
(a) irritable behaviour, uncoordinated actions and emotional detachment
(b) habit of taking drug
(c) irresistible urge to take the drug and increase the dose
(d) none of the above

Question- Which one of the following depresses brain activity and produces feelings of calmness and relaxation?
(a) morphine
(b) V um
(c) amphetamines
(d) hashish

Question- Which of the following immunoglobulins(lgs) is present in milk?
(a) lgA
(b) lgG
(c) lgM
(d) lgE

Question- Which one of the following acts as a physiological barrier to the entry of microorganisms in human body?
(a) Skin
(b) Epithelium of Urogenial tract
(c) Tears
(d) Monocytes

Question- Which of the following is a hallucinogen?
(a) bhang
(b) charas
(c) marijuana
(d) all of these

Question- The letter T in T-lymphocyte refers to
(a) thalamus
(b) tonsil
(c) thymus
(d) thyroid

Question- Human immunodeficiency virus (HIV) is comprised of (a protein coat and genetic material, which is
(a) single stranded DMA
(b) single stranded RNA
(c) double stranded RNA
(d) double stranded DNA

Question- One of the inflammatory reactions induced by histamines is
(a) vasoconstriction of blood vessels
(b) vasodilation of peripheral blood vessels
(c) increased vascular permeability
(d) accelerated blood clotting

Question- Hangover is due to accumulation of
(a) ethanol in liver
(b) ethanolin\lufies
(c) acetaldehyde in body
(d) formation of formaldehyde from aeetaldehycle

Question- Which one of the following statements is correct with regard to the principle of safe blood transfusion?
(a) the donor’s red blood corpuscles should not contain antibodies against the recipient’s serum
(b) the recipient’s serum should not contain antigens against the donor’s antibodies
(c) the recipient’s serum should not contain the antibodies against the red blood corpuscles of the donor
(d) the recipient’s red blood corpuscles should not contain antibodies against the donor’s antigen

Question- Damage to thymus in a child may lead to
(a) a reduction in haemoglobin content of blood
(b) a reduction in stem cell production
(c) loss of antibody mediated immunity
(d) loss of cell mediated immunity

Question- Colostrum provides the infant with
(a) auto immunity
(b) passive immunity
(c) active immunity
(d) innate immunity

Question- Lysozyme kills by destroying
(a) cell walls
(b) mitochondria enzymes
(c) lipid bilayers
(d) the machinery for DMA replication

Question- The humoral immune system defends mostly against bacteria and viruses in the
(a) body fluids
(b) digestive tract
(c) internal organs
(d) regions beneath the skin

Question- The effect of opiates is
(a) numbing of pain causing drowsiness, lethargy and feeling of well being
(b) reduction of anxiety and tension
(c) lowering of blood pressure and breathing rate
(d) all of the above

Question- The treatment of snake-bite by antivenin is an example of
(a) artificially acquired active immunity
(b) artificially acquired passive immunity
(c) naturally acquired passive immunity
(d) specific natural immunity

Question- A person likely to develop tetanus is immunised by administering
(a) preformed antibodies
(b) wide spectrum antibiotics
(c) weakened germs
(d) dead germs

Question- The term ‘active immunity’ means
(a) increasing rate of heart beat
(b) increasing quantity of blood
(c) resistance developed after disease
(d) resistance developed before disease

Question- Alcohol is
(a) hallucinogen
(b) tranquilliser
(c) stimulant
(d) depressant

Question- The immunoglobulin present in mother’s milk is
(a) lgD
(b) lgE
(c) lgM
(d) lgA

Question- Ganja and LSD are classified in
(a) stimulants
(b) narcotics
(c) depressents
(d) hallucinogens

Question- White blood cell that are non-specific killers of microbes are
(a) B cells
(b) phagocytes
(c) killerT cells
(d) helper!cells

Question- Peyer’s patches produce
(a) mucous
(b) lymphocytes
(c) trypsin
(d) enterokinase

Question- The regions of an antibody that make it distinct from all other kinds of antibodies are its
(a) variable (V) regions
(b) constant (C) regions
(c) mutated (M) regions
(d) bifurcated (B) regions

Question- The formation of antibodies within our body is called
(a) passive immunity
(b) active immunity
(c) innate immunity
(d) acquired immunity

Question- Persons with severe combined immunodeficiency has no
(a) interferons
(b) macrophages
(c) or B cells
(d) functioning lymph nodes

Question- Which of the following is observed as No Tobacco Day?
(a) 1st May
(b) 31st May
(c) 1st August
(d) 31st August

Question- Which one of the following provides non-specific pathogen defense for the body?
(a) T-cells 
(b) B-cells
(c) phagocytes
(d) stem cells

Question- The common means of transmission of AIDS is
(a) sexual intercourse
(b) blood.transfusion
(c) placental transfer
(d) all of these

Question- The term immunity refers to
(a) the combined actions of all white blood cells
(b) events that occur within the lymphatic system
(c) general defenses against all microorganisms
(d) specific defenses against microbes encountered during an earlier exposure

Question- Which of the following are most abundant types of antibody?
(a) lgA
(b) lgG
(c) JgE
(d) lgM

Question- Heroin is –
(a) morphine
(b) diacetylmorphine
(c) stimulant
(d) hallucinogen

Question- Smoking is harmful as it produces polycyclic aromatic hydrocarbons that cause
(a) reduction in oxygen transport
(b) increase in blood pressure
(c) cancer
(d) retardation of foetus

Question- A person may die after getting a bee sting in his body due to
(a) toxicity
(b) coagulation of blood
(c) anaphylactic shock
(d) toxicity and coagulation of blood

Question- Tobacco addiction causes-
(a) gastric and duodenal ulcers
(b) anthrax
(c) skin eruptions
(d) none of these

Question- Monoclonal antibodies are produced from which type of cells ?
(a) hybridoma
(b) multinucleate
(c) prokaryote
(d) uninucleate

Question- Alcoholic beverages contain
(a) methyl alcohol
(b) ethyl alcohol
(c) propyl alcohol
(d) a mixture of all the above

Question- T-cells have a life of
(a) 4-5 days
(b) 4-5 weeks
(c) 4-5 months
(d) 4-5 years

Question- Tobacco is obtained from
(a) Diospyros melanoxylon
(b) Nicotiana tabacum
(c) Nicotiana rustica
(d) both (b) and (c)

Question- Cancer cells are more eaily damaged by radiation then normal cells because they are-
(a) Starved to nutrition
(b) Undergo rapid division
(c) Different in structure
(d) Non-dividing

Question- Withdrawal of tobacco produces
(a) restlessness, depression and anxiety
(b) increased appetite but disturbed bowels
(c) insomnia and impaired concentration
(d) all of the above

Question- Alteration of which genes lead to cancer ?
(a) Cell proliferation gene (proto oncogeses)
(b) Tumour suppressor gene
(c) Mutant alder
(d) Any of these

Question- Which of the following diseases is due to an allergic reaction?
(a) goitre
(b) skin cancer
(c) hay fever
(d) enteric fever

Question- Where will you look for the sporozoites of the malarial parasite?
(a) S vary glands of freshly moulted female Anopheles mosquito
(b) S va of infected female Anopheles mosquito
(c) Red blood corpuscles of humans suffering from malaria
(d) Spleen of infected humans

Question- Kupffer cells are present in
(a) pancreas
(b) throid gland
(c) liver
(d) small intestine

Question- Hela cells used in cell biology are-
(a) Cancerous cell gram in laboratory
(b) Cerical cancer cell derivatives
(c) Both of these
(d) None of these

Question- Hybridomas are result of the fusion of
(a) normal antibody producing cell with myeloma
(b) abnormal antibody producing cell with myeloma
(c) male reproductive cell with myeloma
(d) female reproductive cell with myeloma

Question- Which of these is not a cell of the macrophage system?
(a) Kupffer cell
(b) osteoclasts
(c) Langerhans cells
(d) astrocyte

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