Practice MCQs for NEET Biology Human Health and Disease
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Multiple Choice Questions
(a) Human liver
(b) Gut of female Anopheles
(c) Salivary glands of Anopheles
(d) Human RBCs
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Answer: (b) Gut of female Anopheles
Explanation:
1. Gamete formation starts in human RBC's but rest process continues in Anopheles (female) from mouth gametes enters into stomach and reproduce sexually to produce zygote.
(a) Rejection of a kidney graft is the function of B lymphocytes
(b) Preformed antibodies need to be injected to treat the bite by a viper snake
(c) The antibodies against small pox pathogen are produced by T lymphocytes
(d) Antibodies are protein molecules, each of which has four light chains
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Answer: (b) Preformed antibodies need to be injected to treat the bite by a viper snake
Explanation:
1. Preformed antibodies need to be injected to treat the bite by a viper snake. (2) The antibodies against small pox pathogen are produced by B-lymphocytes. (3) Antibodies are protein molecules, each of which has 2 heavy chain and 2 light chains. (4) Rejection of a kidney graft is the function of T-lymphocytes.
(a) WIDAL
(b) ELISA
(c) MRI
(d) Ultrasound
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Answer: (b) ELISA
Explanation:
1. Enzyme linked immuno sorbent assay– Test that uses antibodies and colour change to identify HIV (antigen).
2. WIDAL– Typhoid MRI– Magnetic Resonance Imaging– Cancer.
3. Ultrasound– Used in medical imaging (visual representation of interior of body).
(a) Caused by a Gram-negative bacterium
(b) Not an infectious disease
(c) Caused by a virus
(d) Caused by a Gram-positive bacterium
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Answer: (c) Caused by a virus
Explanation:
1. Antibiotics are taken against bacterial infections not against viral infections.
2. Common cold is an infectious disease.
(a) Viruses
(b) Bacteria
(c) Fungi
(d) Nematodes
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Answer: (c) Fungi
Explanation:
1. Microsporum, Trichophyton, Epidermophyton are fungi causing ring worm.
(a) Barbiturates cause relaxation and temporary euphoria
(b) Hashish causes after thought perceptions and hallucinations
(c) Opium stimulates nervous system and causes hallucinations
(d) Morphine leads to delusions and disturbed emotions
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Answer: (b) Hashish causes after thought perceptions and hallucinations
Explanation:
1. The corrected statments are: (1) Barbiturates depresses brain activity and produce feeling of calmness, relaxation. (3) Opium suppresses brain function and produce temporary euphoria. (4) Morphine relieve pain and called analgesic.
(a) Rabies, mumps
(b) Cholera, tuberculosis
(c) Typhoid, tetanus
(d) AIDS, syphilis
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Answer: (a) Rabies, mumps
Explanation:
1. Rabies– Rhabdo virus, Mumps– Paramyxo virus Cholera, Tuberculosis, Typhoid, tetanus, syphilis are caused by bacteria.
2. AIDS caused by HIV virus.
(a) Villi
(b) Peyer's patches
(c) Rugae
(d) Choroid plexus
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Answer: (b) Peyer's patches
Explanation:
1. Villi– small, finger- like projections that protrude from thee epithelial lining of intestinal wall.
2. Rugae– large folds in the mucous membrane.
3. Choroid plexus– is a plexus in the ventricles of the brain where cerebrospinal fluid is produced.
(a) Forming RBC
(b) Destroying bacteria
(c) Forming WBC
(d) Forming antibodies
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Answer: (a) Forming RBC
Explanation:
1. RBCs are formed in bone marrow.
2. Lymph glands serve to trap micro-organisms or other antigens which are present in lymph and tissues fluid.
3. These antigens activate lymphocytes which destroy these antigens.
(a) IgA
(b) IgG
(c) IgM
(d) IgD
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Answer: (a) IgA
Explanation:
1. It is the main immunoglobulin found in mucous secretions, tears, saliva, sweat, colostrum and secretions from urinogenital tract, gastro genital tract, prostate and respiratory epithelium, which are all physical and physiological barriers of innate immunity.
(a) Na+ prevents water loss from body
(b) NaCl function as regulatory material
(c) NaCl produces energy
(d) NaCl is antibacterial
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Answer: (a) Na+ prevents water loss from body
Explanation:
1. This is so because na+ is solute and it retains solvent in the body thus preventing loss of water from the body.
(a) Mycoplasma
(b) Bacteria
(c) Viruses
(d) Fungi
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Answer: (c) Viruses
Explanation:
1. Interferons stimulate synthesis of anti-viral proteins.
2. So they are used to control viral diseases but they do not kill the virus.
(a) Decreased efficiency of the immune system
(b) Insensitivity of the individual following prolonged exposure to antibiotics
(c) Development of mutant strains resistant to antibiotics
(d) Activation of antibiotics by bacterial enzymes
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Answer: (c) Development of mutant strains resistant to antibiotics
Explanation:
1. Antibiotics could not solve all the problems of bacteria medicated disease because due to continuous exposure to antibiotics bacteria develops resistance against these antibiotics by undergoing mutations.
(a) Malignant tumours of the connective tissue
(b) Malignant tumours of the skin or mucous membrane
(c) Malignant tumours of the bone
(d) Benign tumours of the connective tissue
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Answer: (b) Malignant tumours of the skin or mucous membrane
Explanation:
1. Carcinoma refers to malignant tumours of epithelial tissue derived from ectoderm.
(a) Double stranded RNA
(b) Double stranded DNA
(c) Single stranded DNA
(d) Single stranded RNA
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Answer: (d) Single stranded RNA
Explanation:
1. Two single stranded molecules of RNA are found in HIV.
(a) The antigen binding site of the antibody molecule is called ‘paratope’
(b) Toxoids provide with passive immunity
(c) ‘ATS’ anti-tetanus serum provides us with artificially induced passive immunity
(d) The first gene therapy was done for SCID in which the gene for the enzyme adenosine deaminase was introduced
Show Answer & Explanation
Answer: (b) Toxoids provide with passive immunity
Explanation:
1. Toxoids (inactive toxins) provide active immunity.
(a) Pituitary gland
(b) Spleen
(c) Thymus gland
(d) Parathyroid gland
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Answer: (c) Thymus gland
Explanation:
1. Thymus provides an inductive environment for development of T-cells.
2. Thymus begins atrophy (partial or complete wasting away of a part of the body) with age which slows down the power of defence against the invasion of germs.
(a) NACO
(b) DOTS
(c) RCH
(d) WHO
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Answer: (a) NACO
Explanation:
1. (1) NACO : National AIDS control Organisation (2) DOTS : Tuberculosis– Directly observed Treatment Short-course. (3) RCH : Reproductive and child health care programme– main aim to reduce infant, child and maternal mortality rates. (4) WHO : World Health Organization– Concerned with public health.
(a) There are three main types - cytotoxic T-cells, helper T-cells and suppressor T-cells
(b) These originate in secondary lymphoid tissues
(c) They scavenge damaged cells and cellular debris
(d) These are produced in thyroid
Show Answer & Explanation
Answer: (a) There are three main types - cytotoxic T-cells, helper T-cells and suppressor T-cells
Explanation:
1. This is true about T-cells in mammals.
2. The corrected statements are: (2) These originate in primary lymphoid tissues (bone marrow) (3) Phagocytic cells like monocytes scavenge damaged cells and cellular debris. (4) These get mature in thymus.
(a) Elephantiasis and dengue
(b) Yellow fever and sleeping sickness
(c) Encephalitis and sleeping sickness
(d) Yellow fever and dengue
Show Answer & Explanation
Answer: (d) Yellow fever and dengue
Explanation:
1. Yellow fever and dengue are caused by virus and transmitted by Aedes mosquito.
2. Elephantiasis : Helminthic disease, transmitted by Culex mosquito.
3. Sleeping sickness : Protozoan disease, transmitted by tse-tse fly.
Reason (R): Allergic response may cause vasoconstriction and death.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
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Answer: (d) Both Assertion and Reason are false.
Explanation:
1. Asthma patients can be exposed to dust but they should avoid exposure to dust as it can act as an allergen.
2. Allergic response may cause vasodilation and death.
Reason (R): IgM from mother’s milk protects the baby from the respiratory infection usually affecting in young age.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation
Answer: (c) Assertion is true but the Reason is false.
Explanation:
1. Colostrum is very efficient means of transferring immunity to new born because it has abundant antibodies (IgA) to protect the infant.
2. IgA from mother's milk protects the baby from the respiratory infection usually affecting in young age.
Reason (R): The disease germs remain concentrated in it.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
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Answer: (a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
Explanation:
1. The bacteria of typhoid remain in gall bladder.
Reason (R): Anti-tetanus injection provides active immunity by providing preformed antibodies for tetanus.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation
Answer: (c) Assertion is true but the Reason is false.
Explanation:
1. A person who has received a cut accident and is bleeding needs to be given anti-tetanus treatment because antigen causing tetanus may have entered the body against which preformed antibodies have to be injected to avoid the effect of antigen.
2. Anti-tetanus injection provides passive immunity by providing preformed antibodies for tetanus.
Reason (R): Both these drugs suppress brain function.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation
Answer: (d) Both Assertion and Reason are false.
Explanation:
1. LSD and marijuana are hallucinogens.
2. Both these drugs do not suppress brain function instead they alter thoughts, feelings and perceptions.
Human Health and Disease Objective Questions & Solutions for NEET Biology
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FAQs
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