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Quiz 10
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Q.1
IV that causes AIDS, first starts destroying: …[AIPMT 2015]
0%
a) Thrombocytes
0%
b) B – Lymphocytes
0%
c) Leucocytes
0%
d) Helper T – Lymphocytes
Explanation
HIV enters into helper T-lymphocytes (TH), replicates and produce progeny viruses. The progeny viruses released in the blood attack other helper T-lymphocytes Answer:(d)
Q.2
e type of immunity obtained from mother by a neonate is known as:
0%
a) Artificially acquired natural immunity
0%
b) Naturally acquired active immunity
0%
c) Naturally acquired passive immunity
0%
d) Both B and C
Explanation
Answer:(c)
Q.3
Drug addict shows symptoms of depressed brain activity, feeling of calmness, relaxation, drowsiness. Possibly the addiction is of ... [ AIIMS 2005]
0%
a) Valium
0%
b) Amphetamine
0%
c) Morphine/pethidine
0%
d) Marijuana/hashish
Explanation
Valium generic name is Diazepam is used to treat anxiety, alcohol withdrawal, and seizures. It is also used to relieve muscle spasms and to provide sedation before medical procedures. This medication works by calming the brain and nerves. Amphetamines are stimulant drugs, which means they speed up the messages travelling between the brain and the body. Morphine is the standard opium-based analgesic ( pain reliever). Marijuana/hashish causes distorted perception (sights, sounds, time, touch); difficulty in thinking and problem solving; loss of coordination; and increased heart rate, anxiety, and panic attacks. Answer : (a)
Q.4
Zoonotic disease transmitted to humans is … [ kerala 2001]
0%
a) Measles
0%
b) Diphtheria
0%
c) Measles
0%
d) Rabies
Explanation
Rabies is a zoonotic disease (a disease that is transmitted from animals to humans), caused by the rabies virus Answer : (d)
Q.5
Which is produced by primary immune response? … [ WB 2009]
0%
a) IgA
0%
b) IgE
0%
c) IgM
0%
d) IgG
Explanation
Following the first exposure to a foreign antigen, a lag phase occurs in which no antibody is produced, but activated B cells are differentiating into plasma cells. The first antibody produced is manily IgM Answer : (c)
Q.6
Which one acts as physiological barrier to entry of microorganisms in human body ..
0%
a) Monocytes
0%
b) Skin
0%
c) Epithelium of urogenital tract
0%
d) Tears
Explanation
Physiological barrier barriers include intact skin, vigorous mucociliary clearance mechanisms, low stomach pH and bacteriolytic lysozyme in tears, saliva and other secretions. Answer : (d)
Q.7
Tranquilizer is drug used for … [ Manipal 2002]
0%
a) Inducing sleep
0%
b) Relieving pain
0%
c) Giving soothing effect
0%
d) Giving stimulating effect
Explanation
Tranquilizer, drug that is used to reduce anxiety, fear, tension, agitation, and related states of mental disturbance (or giving stimulating effect) Answer : (c)
Q.8
Vaccination provides … [ AFMC 2002]
0%
a) Active immunity
0%
b) Passive immunity
0%
c) Natural immunity
0%
d) Both A and B
Explanation
Vaccines provide active immunity to disease. A newborn baby acquires passive immunity from its mother through the placenta. Natural immunity occurs through contact with a disease causing agent Answer : (a)
Q.9
Some protection is provided against carcinogens by … [ AFMC 2000]
0%
a) Penicillic acid
0%
b) Aflatoxin
0%
c) Streptomycin
0%
d) Tocopherol/vit.E
Explanation
Due to their strong antioxidant properties, tocopherols have been suggested to reduce the risk of cancer . Lower vitamin E nutritional status is associated with an increased risk of certain cancers Answer : (d)
Q.10
Monoclonal antibodies are produced from hybrid cells called hybridoma. The cells used to form hybridoma cells are … [ AIIMS 2007]
0%
a) T-lymphocytes and myeloma cells
0%
b) B-lymphocytes and carcinoma cells
0%
c) B-lymphocytes and myeloma cells
0%
d) Lymphoma cells and bone marrow cells
Explanation
Hybridoma technology is a method for producing large numbers of identical antibodies. The hybrid cell has the capacity of antibody production derived from B cells At the same time it can divide continuously by the quality derived from Myeloma cells By combining the desired qualities of both the cells, the technology ensures large scale Antibody production of single specificity Answer : (c)
Q.11
Which is not an autoimmune disease …[ JKCMEE 2010]
0%
a) Grava’s disease
0%
b) Pernicious anaemia
0%
c) Rheumatoid arthritis
0%
d) Insomnia
Explanation
Common causes of chronic insomnia is Stress or trauma. Rheumatoid arthritis, Inflammatory bowel disease, Multiple sclerosis, Type 1 diabetes mellitus, Guillain, Psoriasis, Graves' disease, Hashimoto's thyroiditis, Myasthenia gravis, Vasculitis Answer : (d)
Q.12
The sever and fatal malaria is caused by Plasmodium species … [ RPMT 1996]
0%
a) P. vivax
0%
b)P.ovale
0%
c) P.malariae
0%
d) P.falciparum
Explanation
Plasmodium falciparum is the type of malaria that most often causes severe and life-threatening malaria Answer : (d)
Q.13
What product of immune system attaches to bacteria making them prone to be eliminated by white blood cells ..[ JKCET 2012]
0%
a) Antigen
0%
b) Haemoglobin
0%
c) Antibody
0%
d) MHC I molecule
Explanation
Antibodies contribute to immunity in three ways: preventing pathogens from entering or damaging cells by binding to them (neutralization); stimulating removal of pathogens by macrophages and other cells by coating the pathogen (opsonization); and triggering destruction of pathogens by stimulating other immune responses Answer : (c)
Q.14
Lysis of foreign cells is mediated through … [ AIIIMS 2002]
0%
a) IgM only
0%
b) IgA only
0%
c) IgM and IgG
0%
d) IgD and IgE
Explanation
Cells exhibiting the foreign antigen are tagged with antibodies ( IgG or IgM) and they are then recognised by natural killer (NK) cells and macrophages which in turn kill these tagged cells or Lysis of foreign cells. Answer : (c)
Q.15
Typhoid is … .. disease [ MHTCET 2011]
0%
a) Viral
0%
b) Fungal
0%
c) Bacterial
0%
d) Protozoan
Explanation
Typhoid fever is an acute illness associated with fever caused by the Salmonella enterica serotype Typhi bacteria. Answer : (c)
Q.16
Diphtheria is connected with … [ AFMC 1994]
0%
a) Lungs
0%
b)Throat
0%
c) Blood
0%
d) Liver
Explanation
Diphtheria signs and symptoms usually begin two to five days after a person becomes infected and may include: A thick, gray membrane covering throat and tonsils. Answer : (b)
Q.17
Cirrhosis of liver …
0%
a) Shrinkage and fibrosis of liver
0%
b) Swelling of liver
0%
c) Cancer of liver
0%
d) Accumulation of bile in liver due to obstruction
Explanation
When the whole liver is scarred, it shrinks and gets hard, this is called cirrhosis Answer : (a)
Q.18
Hypersensitivity to an allergen is due to
0%
a) Increase in temperature
0%
b) Food habits
0%
c) Age
0%
d) Aberrant functioning of immune system
Explanation
An immune response to an antigen may result not only in protective immunity but also a detectable reaction to challenge with that antigen, called sensitivity, and therefore hypersensitivity is a reflection of excessive or aberrant immune responses. Answer : (d)
Q.19
Which of the following is released initially as an inflammatory response?
0%
a) Interferon
0%
b) Chitin
0%
c) Cytokines
0%
d) Cytokinis
Explanation
Cytokines are cell signalling molecules that aid cell to cell communication in immune responses and stimulate the movement of cells towards sites of inflammation, infection and trauma Cytokinins (CK) are a class of plant growth substances (phytohormones) that promote cell division, or cytokinesis, in plant roots and shoots.Option 'd' is NOT correct Answer : (c)
Q.20
Sedatives and tranquilizers are also called … ..[ MHT CET 2000]
0%
a) Stimulants
0%
b) Depressants
0%
c) Hallucinogens
0%
d) Pain killers
Explanation
Tranquilizers the term is generally used as a synonym for sedative. Sedatives are central nervous system depressants Answer : (b)
Q.21
In alcoholics liver gets damaged due to …[ MPPMT 1999]
0%
a) Accumulation of fats
0%
b) Storage of glycogen
0%
c) Secretion of more bile
0%
d) Detoxification of alcohol
Explanation
Alcoholic steatohepatitis (ASH) happens when a build-up of excess fat in the liver is accompanied by liver inflammation. This is also known as alcoholic hepatitis. Answer : (a)
Q.22
A water borne disease is … [ MPPMT 1994]
0%
a) Small pox
0%
b) Tuberculosis
0%
c) Malaria
0%
d) Cholera
Explanation
A water borne disease is Cholera Answer : (d)
Q.23
Which one is correctly matched …. [ CBSE 2001]
0%
a) Cocaine – Opiate narcotic
0%
b) Bhang – Analgesic
0%
c) Reserpine – Tranquilizer
0%
d) Morphine – Hallucinogen
Explanation
Cocaine is a highly addictive and illegal stimulant that is made from the leaves of the coca plant. Option 'a' is NOT correct match Bhang is commonly used to reduce anxiety and increase libido.Option 'a' is NOT correct match Reserpine is used as a long-acting tranquilizer. Option 'c' is correct match Morphine belongs to a class of drugs known as opioid analgesics. Option 'd' is NOT correct match Answer : (c)
Q.24
AIDS spreads due to … [ MPPMT 1995]
0%
a) Homosexuality
0%
b) Immoral way of life
0%
c) Infected needles and syringes
0%
d) All the above
Explanation
HIV can spread: during sex (especially anal sex and vaginal sex) through sharing needles for injecting drugs or tattooing. by getting stuck with a needle with an infected person's blood on it, AIDS spreads due to Homosexuality, immoral way of life. Answer : (d)
Q.25
Select the correct statement about diseases and immunization … [ CBSE 2011]
0%
a) If due to some reason, B and T-lymphocytes are damaged the body will not produce antibody against a pathogen
0%
b) Injection of dead/inactivated pathogens causes passive immunity.
0%
c) Certain protozoans have been used in mass production of hepatitis-B vaccine
0%
d) Injection of snake antivenom against snake bite is an example of active immunization
Explanation
T cells are involved in cell-mediated immunity, whereas B cells are primarily responsible for humoral immunity (relating to antibodies). T cells play a major role in defence against intracellular pathogens. other immune cells, releasing cytokines, and helping B cells to produce antibodies.Option a correct match Adaptive immunity is an immunity that occurs after exposure to an antigen either from a pathogen or a vaccination.. Option 'b' is NOT correct match hepatitis-B vaccine is produced by yeast cells, into which the gene for HBsAg has been inserted. Afterward an immune system antibody to HBsAg is established in the bloodstream. The antibody is known as anti-HBs. Option 'c' is NOT correct match Injection of snake antivenom against snake bite is an example of Passive Immunity Option 'd' is NOT correct match Answer : (a)
Q.26
Which of the following is not used for treating cancer … [ BHU 2012]
0%
a) 131I
0%
b) 60Co
0%
c) Taxol
0%
d) Streptokinase
Explanation
Streptokinase is a thrombolytic medication and enzyme. As a medication it is used to break down clots in some cases of myocardial infarction, pulmonary embolism, and arterial thromboembolism. 131I, 60Co, Taxol is used for treating cancer Answer : (d)
Q.27
Papaver album provides one of the following …
0%
a) Nicotine
0%
b) Morphine
0%
c) Tannin
0%
d) Caffeine
Explanation
Papaver somniferum, commonly known as the opium poppy Opium contains a class of naturally occurring alkaloids known as opiates, that include morphine, codeine, thebaine, oripavine, papaverine and noscapine. Answer : (b)
Q.28
Naloxone/nalorphine is used as antidote intravenously for overdose of … ..[ kerala 2003]
0%
a) Heroin
0%
b) Alcohol
0%
c) Librium
0%
d) Morphine
Explanation
nalorphine was used as an antidote for severe respiratory depression and other body function disorders caused by acute poisoning in case of an overdose of morphine, promedol, fentanyl or other narcotic analgesics, or with increased sensitivity to them. Answer : (d)
Q.29
A disease which causes maximum deaths in children is … [ BHU 2012]
0%
a) Diphtheria
0%
b) Measles
0%
c) pneumonia
0%
d) Whooping cough
Explanation
Two causes accounted for 50% of all deaths at ages 1-59 months: pneumonia and diarrhoeal diseases. Answer : (c)
Q.30
Genes involved in cancer are … [ MPPMT 1993]
0%
a) Cancer genes
0%
b) Oncogenes
0%
c) Tumour genes
0%
d) Regulator genes
Explanation
An oncogene is a gene that has the potential to cause cancer. Answer : (b)
Q.31
With reference to Cannabis which is correct for 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 …[ Guj CET 2010]
0%
a) X and Y are wrong, Z is independent of X and Y
0%
b) X is wrong, Y is correct and Z is correct reason for Y
0%
c) X is correct, Y is wrong and Z is correct reason for X
0%
d) Both X and Yare correct, Z is correct reason for Y
Explanation
Cannabis flowers are not brightly colored, large, or enticingly fragrant. So statemnt x is not correct. Pollen grains are small, light, dry, dusty and sometimes winged (or saccate)so that they are easily blown away to long distances. Y is correct and Z is correct reason for Y Answer : (b)
Q.32
LSD is got from … [ AFMC 2000]
0%
a) Fungus
0%
b) Lichen
0%
c) Alga
0%
d) Bacterium
Explanation
LSD is one of the most potent, mood-changing chemicals. It is manufactured from lysergic acid, which is found in the ergot fungus that grows on rye and other grains. Answer : (a)
Q.33
When children play bare-footed in pools of dirty water and flood water, they may suffer from … [ AIIMS 2006]
0%
a) Leptospirosis and bilharzias
0%
b) Malaria, amoebic dysentery and leptospirosis
0%
c) Bilharzia, infective hepatitis and diarrhea
0%
d) Guinea worm infection, elephantiasis and amoebic dysentery
Explanation
Humans can get leptospirosis through direct contact with urine from infected animals or through water, soil or food contaminated with their urine. Bilharzia infection starts when a person comes into direct contact with fresh water where certain types of water snail carry the worm. So option 'a' is correct. Amoebiasis infection is most common in tropical areas with untreated water. It spreads through drinking or eating uncooked food, such as fruit, that may have been washed in contaminated local water. So option b is not correct diarrhea happens because of a virus that gets into your gut. So option c is not correct Guinea worm infecton is by drinking water from ponds and other stagnant water containing tiny "water fleas" that carry the Guinea worm larvae. So option 'd' s not correct Water-borne diseases linked to flooding such as Malaria, Cholera, Shigellosis, Hepatitis A, Dengue fever, Leptospirosis, Typhoid Fever Answer : (a)
Q.34
Entamoeba histolytica is transmitted through .. [ CPMT 1996]
0%
a) Insect bite
0%
b) Bird dropping
0%
c) Sweat
0%
d) Food or water contaminated with cysts
Explanation
Entamoeba histolytica is transmitted primarily through the fecal-oral route. Infective cysts can be found in fecally contaminated food and water supplies and contaminated hands of food handlers. Sexual transmission is possible, especially in the setting of oral-anal practices (anilingus). Answer : (d)
Q.35
Assertion:: Mast cells in human body release excess amount of inflammatory chemicals which cause allergic reactions. Reason: Allergens in the environment reaching human body stimulate mast cells in certain individuals … [ AIIMS 2008]
0%
a) If both the assertion and reason are true and reason explains the assertion.
0%
b) If both the assertion and reason are true but reason does not explain the assertion
0%
c) If assertion is true but reason is false
0%
d) If assertion is false but reason is true.
Explanation
In an allergic reaction—the immune system's hypersensitivity reaction to usually harmless foreign substances (called antigens in this context) that enter the body—mast cells release histamine in inordinate amounts. Answer : (a)
Q.36
Interferon act against viral infection by … [ BHU 2004]
0%
a) Protecting other cells against virus
0%
b) Functioning as macrophages
0%
c) Providing antibodies
0%
d) Directly destroying genetic material of virus
Explanation
Interferon is secreted by cells in response to stimulation by a virus or other foreign substance, but it does not directly inhibit the virus's multiplication. Rather, it stimulates the infected cells and those nearby to produce proteins that prevent the virus from replicating within them. Answer : (a)
Q.37
Which stage of Wuchereria bancrofti infective to man ..[ WB 2011]
0%
a) First stage larva
0%
b)Third stage larva
0%
c) Second stage larva
0%
d) Mature worm
Explanation
Microfilariae are ingested by mosquitos and exsheath following the blood meal, penetrate the mosquito gut wall and migrate to the mosquito's thoracic muscle where they grow and undergo two molts to infective third-stage larvae (L3) in 10–14 days. Answer : (b)
Q.38
Opium, opiates and heroin are got from .. .. [ Manipal 2002]
0%
a) Papaver
0%
b) Cannabis
0%
c) Thea
0%
d) Theobroma
Explanation
Opium and the drugs obtained from it are called opiates. Heroin is an opioid drug made from morphine, a natural substance taken from the seed pod of the various opium poppy plants Answer : (a)
Q.39
At which stage of HIV infection does one usually show symptoms of AIDS? …[AIPMT 2014]
0%
a) When HIV damages large number of helper T- Lymphocytes
0%
b) When the viral DNA is produced by reverse transcriptase.
0%
c) Within 15 days of sexual contact with an infected person.
0%
d) When the infected retro virus enters host cells.
Explanation
HIV enters into helper T-lymphocytes (TH), replicates and produce progeny viruses. The progeny viruses released in the blood attack other helper T-lymphocytes. This is repeated leading to a progressive decrease in the number of helper Tlymphocytes in the body of the infected person. During this period, the person suffers from bouts of fever, diarrhoea and weight loss. Answer:(a)
Q.40
hich is the particular type of drug that is obtained from the plant whose one flowering branch is shown below? [AIPMT 2014]
0%
a) Stimulant
0%
b) Pain – killer
0%
c) Hallucinogen
0%
d) Depressant
Explanation
The plant shown in the picture is Datura which produce natural hallucinogens. This kind of drug induce behavioural abnormalities by changing thoughts, feelings perceptions without any actual sensory stimulus. Answer:(c)
Q.41
Match each disease with its correct type of vaccine : …[AIPMT 2015]
(a) tuberculosis
(i) harmless virus
(b) Whooping cough
(ii) inactivated toxin
(c) diphtheria
(iii) killed bacteria
(d) polio
(iv) harmless bacteria
0%
a) a → (i) ; b → (ii); c → (iv); d → (iii)
0%
b) a → (ii) ; b → (i); c → (iii); d → (iv)
0%
c) a → (iii) ; b → (ii); c → (iv); d → (i)
0%
d) a → (iv) ; b → (iii); c → (ii); d → (i)
Explanation
Answer:(d)
Q.42
Infection of Ascaris usually occurs by …[NEET 2013]
0%
a) Drinking water containing eggs of Ascaris
0%
b) Eating imperfectly cooked port
0%
c) Tsetse fly
0%
d) Mosquito bite
Explanation
Ascaris, an intestinal parasite causes ascariasis. Symptoms of these disease include internal bleeding, muscular pain, fever, anaemia and blockage of the intestinal passage. The eggs of the parasite are excreted along with the faeces of infected persons which contaminate soil, water, plants, etc. A healthy person acquires this infection through contaminated water vegetables, fruits, etc. Answer:(a)
Q.43
The cell-mediated immunity inside the human body is carried out by …[NEET 2013]
0%
a) T-lymphocytes
0%
b) B-lymphocytes
0%
c) Thrombocytes
0%
d) Erythrocytes
Explanation
cell-mediated immune response or cell-mediated immunity (CMI) is mediated by the T-lymphocytes Answer:(a)
Q.44
Which kind of therapy was given in 1990 to a four year old girl with adenosine deaminase (ADA) deficiency ? …[NEET 2016]
0%
a) Immunotherapy
0%
b) Radiation therapy
0%
c) Gene therapy
0%
d) Chemotherapy
Explanation
The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. Answer:(c)
Q.45
Which of the following is correct regarding AIDS causative agent HIV ? …[NEET 2016]
0%
a) HIV is unenveloped retrovirus.
0%
b) HIV does not escape but attacks the acquired immune response.
0%
c) HIV is enveloped virus containing one molecule of single-stranded RNA and one molecule of reverse transcriptase.
0%
d) HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase.
Explanation
Answer:(d)
Q.46
Which of the following sets of diseases is caused by bacteria? …[NEET 2016]
0%
a) Tetanus and mumps
0%
b) Herpes and influenza
0%
c) Cholera and tetanus
0%
d) Typhoid and smallpox
Explanation
Tetanus is an infection caused by a bacterium called Clostridium tetani. The mumps are caused by a virus called the paramyxovirus. Genital herpes is a common sexually transmitted infection caused by the herpes simplex virus Influenza is a virus A bacterium called Vibrio cholerae causes cholera infection. Typhoid fever is caused by a type of bacteria called Salmonella typhi. Smallpox is caused by infection with the variola virus. Answer:(c)
Q.47
Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections? ….[NEET- 2017]
0%
a) Autoimmune response
0%
b) Cell-mediated immune response
0%
c) Hormonal immune response
0%
d) Physiological immune response
Explanation
Non-acceptance or rejection of graft or transplanted tissues/organs is due to cell mediated immune response. Answer:(b)
Q.48
Grafted kidney may be rejected in a patient due to[ ReAIPMT 2015]
0%
a) Innate immune response
0%
b) Humoral immune response
0%
c) Cell-mediated immune response
0%
d) Passive immune response
Explanation
Cell-mediated immunity is an immune response that does not involve antibodies but rather involves the activation of macrophages and NK-cells, the production of antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen . The cell-mediated immune system plays a role in the rejection of organ transplants or graft tissue graft rejection involves antigen presenting cells in the graft that present antigens to the host’s helper and cytotoxic T lymphocyte cells. In the indirect pathway, the host’s antigen presenting cell recognize the graft as non-self and present graft-derived antigens to helper T cells. The innate immune response consists of physical, chemical and cellular defenses against pathogens. The main purpose of the innate immune response is to immediately prevent the spread and movement of foreign pathogens throughout the body. Humoral immunity or humoural immunity is the aspect of immunity that is mediated by macromolecules found in extracellular fluids such as secreted antibodies, complement proteins, and certain antimicrobial peptides. Passive immunity can occur naturally, when maternal antibodies are transferred to the fetus through the placenta . Answer:(c)
Q.49
Which of the following immunoglobulins does constitute the largest percentage in human milk? [ ReAIPMT 2015]
0%
a) IgG
0%
b) IgD
0%
c) IgM
0%
d) IgA
Explanation
Antibodies, which are also called immunoglobulins, take five basic forms, denoted as IgG, IgA, IgM, IgD and IgE. All have been found in human milk, but by far the most abundant type is IgA, specifically the form known as secretory IgA, which is found in great amounts throughout the gut and respiratory system of adults Answer:(d)
Q.50
In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels? [NEET 2018]
0%
a) Elephantiasis
0%
b) Ascariasis
0%
c) Ringworm disease
0%
d) Amoebiasis
Explanation
Lymphatic filariasis, commonly known as elephantiasis. Lymphatic filariasis is caused by three different species of worms known as Brugia malayi, Brugia timori and Wuchereria bancrofti. These worms cause damage and inflammation to the lymphatic system. The larval form of the worms is introduced into the human body through the bite of infected mosquitoes. Answer : (a)
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