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Quiz 6
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Q.1
Morphine extracted from opium is .. .. [ BHU 2008]
0%
a) Latex
0%
b) Alkaloid
0%
c) Resin
0%
d) Tannin
Explanation
Morphine is one of the natural plant alkaloids found in opium Answer : (b)
Q.2
Polio is caused by a …[ DPMT 2010]
0%
a) Virus with a single stand RNA
0%
b) Virus with a single stand DNA
0%
c) Virus with a double stand DNA
0%
d) Bacteriophages
Explanation
Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus. Polio, or poliomyelitis is nonenveloped virus with a single-stranded RNA genome of positive polarity. Answer : (a)
Q.3
Filarial worm is transmitted by … [ Chd. CET 2012]
0%
a) Kissing Bug
0%
b) Sand fly
0%
c) Tsetse Fly
0%
d) Mosquito
Explanation
Filarial worm is transmitted by mosquito. When a mosquito bites a person who has lymphatic filariasis, microscopic worms circulating in the person's blood enter and infect the mosquito. When the infected mosquito bites another person, the microscopic worms pass from the mosquito through the skin, and travel to the lymph vessels. Answer : (d)
Q.4
AIDS was first reported in … [ CBSE 1996]
0%
a) Russia
0%
b) France
0%
c) U.S.A.
0%
d) Germany
Explanation
First AIDS cases reported in the United States in June 1981 Answer : (c)
Q.5
2005 Nobel Prize was awarded to Marshall and Warren for their discovery of … [ KCET 2011]
0%
a) Human papilloma virus causing cervical cancer
0%
b) Bacterium Helicobacter pylori causing peptic ulcer
0%
c) Prion, a new biological principle of infection
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d) Human immunodeficiency virus
Explanation
The Nobel Prize in Physiology or Medicine 2005 was awarded jointly to Barry J. Marshall and J. Robin Warren "for their discovery of the bacterium Helicobacter pylori and its role in gastritis and peptic ulcer disease." Answer : (b)
Q.6
The term humor in humoral immunity implies …[ Chd. CET 2012]
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a) Hormones
0%
b) Bone marrow
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c) Plasma and lymph
0%
d) Cerebrospinal fluid
Explanation
Humoral is relating to the body fluids, especially with regard to immune responses involving antibodies in body fluids as distinct from cells. Answer : (c)
Q.7
Rare cancer which is marker of AIDS is …. [ AMU 2012]
0%
a) Leukemia
0%
b) Kaposi’s carcinoma
0%
c) Retinoblastoma
0%
d) Squamous cell carcinoma
Explanation
Acquired immunodeficiency syndrome (AIDS) were characterized by the presence of rare Kaposi's sarcoma (KS) skin lesions. Answer : (b)
Q.8
Gamma- globulins are synthesized in … [ CPMT 1999]
0%
a) lymph and lymph nodes
0%
b) Liver
0%
c) Bone marrow
0%
d) Kidney
Explanation
gamma-globulin is formed in the germinal centers of lymphatic nodules and in the cytoplasm of mature and immature plasma cells of two types-those with and those without Russell bodies Answer : (a)
Q.9
Assertion : Sporozoite of malaria parasite enter human body by biting of new born female Anopheles whose mother was carrier Reason Male and female gametocytes of malaria parasite develop in human intestine …..[ AIIMS 2011]
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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
Malaria parasites are formed in the human host through the developmental switch from asexual replication in erythrocytes. Reason is false Answer : (d)
Q.10
Burkitt’s lymphoma is caused by … [ MHT CET 2010]
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a) HIV
0%
b)Reovirus
0%
c) E-B virus
0%
d) None of the above
Explanation
Epstein–Barr virus can play in both the formation and maintenance of Burkitt lymphoma. Answer : (c)
Q.11
Analgesic drugs … ,, [ CBSE 1990]
0%
a) Form tissues
0%
b) Relieve pain
0%
c) Relieve fatigue
0%
d) Cause pain
Explanation
Analgesics are a class of medications designed specifically to relieve pain. Answer : (b)
Q.12
Adaptive/acquired immunity is found in ..[ MHTCET 2008]
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a) Vertebrates
0%
b) Invertebrates
0%
c) Plants
0%
d) All the above
Explanation
Adaptive immunity is also referred to as acquired immunity or specific immunity and is only found in vertebrates. Answer : (a)
Q.13
Neurasthenia refers to .. ..[ kerala 2008]
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a) Undue concern about health
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b) Traumatic experience like rape
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c) Disorder of sensory perception
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d) Mental inability to concentrate on or enjoy things
Explanation
Neurasthenia associated with depression or emotional stress, and is sometimes considered similar to or identical with chronic fatigue syndrome Answer : (d)
Q.14
Which is correct : 1) Common Cold – Droplet transmission 2) Typhoid – Contaminated food 3) AIDS – Shaking hand 4) Ringworm – Using infected towels [AIIMS 2011]
0%
a) 1 and 2
0%
b) 1 and 3
0%
c) 1,2 and 4
0%
d) 3 and 4
Explanation
AIDS don't spread Shaking hand Answer : (c)
Q.15
“Lock jaw” is another name of … [BHU 2005]
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a) Malaria
0%
b) Kala-azar
0%
c) Tetanus
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d) Diphtheria
Explanation
Another name for tetanus is “lockjaw”. It often causes a person's neck and jaw muscles to lock, making it hard to open the mouth or swallow. Answer : (c)
Q.16
Interferon suppresses the pathogenic activity of … [ CPMT 1996]
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a) Bacteria
0%
b) Viruses
0%
c) Protozoans
0%
d) Helminthes
Explanation
Interferon belong to the large class of proteins known as cytokines, molecules used for communication between cells to trigger the protective defenses of the immune system that help eradicate pathogens. Answer : (b)
Q.17
LSD, morphine and Bhang are respectively obtained from … ..[ BHU 2002]
0%
a) Claviceps, Papaver and Cannabis
0%
b) Claviceps, Cannabis and Rauwolfia
0%
c) Cannabis, Claviceps and Fusarium
0%
d) Claviceps, Rauwolfia and Papaver
Explanation
LSD, potent synthetic hallucinogenic drug that can be derived from the ergot alkaloids of the fungus Claviceps purpurea. morphine drug is still obtained from opium or extracted from poppy straw Charas, ganja and bhang are obtained from different varieties of the same plant called 'cannabis sativa' Answer : (a)
Q.18
What are true about angiosarcoma? … a) Malignant tumour cells divide erratically b) Malignant tumour formed from epithelial cells c) Malignant tumour originate from mesoderm d) Malignant tumour form in spleen and lymph nodes
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a) a, b
0%
b) b, d
0%
c) a, c
0%
d) a, d
Explanation
Angiosarcoma is cancer that forms in the lining of blood vessels and lymph vessels. It often affects the skin and may appear as a bruise-like lesion that grows over time. Angiosarcoma is a rare type of cancer that forms in the lining of the blood vessels and lymph vessels. Staement 'd' is true The mutation tells the cell to grow quickly, making more abnormal cells. Statement "a" is true. Angiosarcoma is an uncommon malignant tumor of endothelial cells Stataement b and c are false Answer : (d)
Q.19
Plague is caused by … [ Manipal 1999]
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a) Xanthomonas
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b) Pasteurella pestis
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c) Varicella virus
0%
d) Pseudomonas
Explanation
Pasteurella pestis (now called Yersinia pestis) is a short gram-negative rod that causes plague. Answer : (b)
Q.20
Which one is not property of cancer cells ..[ CBSE 2012]
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a) They show contact inhibition
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b) Divide in uncontrolled manner
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c) Compete with normal cells for vital nutrients
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d) Do not remain confined to area of formation
Explanation
Contact inhibition is a process of arresting cell growth when cells come in contact with each other. As a result, normal cells stop proliferating when they form a monolayer in a culture dish. Contact inhibition is a powerful anticancer mechanism that is lost in cancer cells Answer : (a)
Q.21
Cancer cells are characterized by … [ MPPMT 2004]
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a) Uncontrolled growth
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b) Spreading to the other body parts
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c) Invasion of local tissue
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d) All the above
Explanation
The traits of cancell cells ar (1) Cancer cells stimulate their own growth (self-sufficiency in growth signals); (2) They resist inhibitory signals that might otherwise stop their growth (insensitivity to anti-growth signals); (3) They resist their programmed cell death (evading apoptosis); (4) They can multiply indefinitely (limitless replicative potential)(5) They stimulate the growth of blood vessels to supply nutrients to tumors (sustained angiogenesis); (6) They invade local tissue and spread to distant sites (tissue invasion and metastasis). Answer : (d)
Q.22
People at high risk of getting HIV infection are … [ MPPMT 2011]
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a) Individuals with multiple sexual partners
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b) Drug addicts who take drugs intravenously
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c) Individuals who require repeated blood transfusion
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d) All of the above
Explanation
Answer : (d)
Q.23
T.B. is cured by … [ Bih PMT 1995]
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a) Griseofulvin
0%
b) Ubiquinone
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c) Streptomycin
0%
d) Eucitol
Explanation
Streptomycin is the most effective antibacterial agent known for tuberculosis. In vitro it has a marked bacteriostatic action on the tubercle bacillus, and in vivo it tends to exert a deterrent effect on the disease in both animals and man Answer : (c)
Q.24
A person likely to develop tetanus is immunized by giving … [ CBSE 2009]
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a) Weakened germs
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b) Pre-formed antibodies
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c) Dead germs
0%
d) Wide spectrum antibodies
Explanation
Preformed antibodies, which are derived from the blood serum of previously infected people or animals, are often administered in an antiserum to another person in order to provide immediate, passive immunization against fast-acting toxins or microbes, such as those in snakebites or tetanus infections. Vaccines contain the same germs that cause disease. (For example, measles vaccine contains measles virus, and Hib vaccine contains Hib bacteria.) But they have been either killed or weakened to the point that they don’t make you sick. Some vaccines contain only a part of the disease germ. Dead vaccines are pathogens that are basically inactivated or killed before they go into battle. The slayings occur in a variety of ways, including heat, radiation or chemicals. Unlike the staying power of live attenuated vaccines, reinforcement may be required for these dead vaccines via booster shots. Examples Viral: polio vaccine (Salk vaccine) and influenza vaccine. Bacterial: typhoid vaccine, cholera vaccine, plague vaccine, and pertussis vaccine. Answer : (b)
Q.25
Element required to maintain structure of immunoglobulin is … [ GUJ CET 2008]
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a) S
0%
b) Ca
0%
c) P
0%
d) Fe
Explanation
Answer : (c)
Q.26
ack water fever is caused by:
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a) Plasmodium falciparum
0%
b) Plasmodium malariae
0%
c) Plasmodium vivax
0%
d) Plasmodium ovale
Explanation
Answer:(a)
Q.27
Brown sugar is … ..[ RPMT 2005]
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a) Theophylline
0%
b) Lorazepam
0%
c) Methedrine
0%
d) Diacetylmorphine hydrochloride
Explanation
Diamorphine hydrochloride is an acetylated morphine derivative and is more potent opioid analgesic than morphine. Street/Commercial Names are Big H, Black Tar, Brown sugar, Dope, Junk, Skunk, Chiva, Hell Dust, Horse, Negra, Smack, Thunder, Muc, Skag. Answer : (d)
Q.28
Bacterium concerned with pertussis is … [ BHU 2008]
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a) Bacillus
0%
b) Diplococcus
0%
c) Bordetella pertussis
0%
d) Mycobacterium
Explanation
Pertussis, a respiratory illness commonly known as whooping cough, is a very contagious disease caused by a type of bacteria called Bordetella pertussis Answer : (c)
Q.29
Hypotensive tranquillizer drug reserpine is obtained from roots of … ..[ RPMT 2005]
0%
a) Ferula asafetida
0%
b) Rauwolfia serpentine
0%
c) Papaver somniferum
0%
d) Curcuma longa
Explanation
Reserpine, drug derived from the roots of certain species of the tropical plant Rauwolfia. The powdered whole root of the Indian shrub Rauwolfia serpentina (भारतीय सर्पगंधा)historically had been used to treat snakebites, insomnia, hypertension (high blood pressure), and insanity. Answer : (b)
Q.30
Cigarette smoking causes … [ Guj CET 2011]
0%
a) Lung cancer
0%
b) Baldness
0%
c) Colour blindness
0%
d) None of these
Explanation
Smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD), which includes emphysema and chronic bronchitis. Men who smoke are 23 times more likely to get lung cancer and women who smoke are 13 times more likely. Nonsmokers are also at risk of developing lung cancer. A nonsmoker exposed to secondhand smoke has a 20-30% higher risk of developing lung cancer Answer : (a)
Q.31
Allergens are noninfectious. They induce disorders through secretion … [ DPMT 2003]
0%
a) IgM
0%
b) IgE
0%
c) Histamines
0%
d) Both B and C
Explanation
If you have an allergy, your immune system overreacts to an allergen by producing antibodies called Immunoglobulin E (IgE). The IgE antibodies bind to mast cells. The allergen cross-links them. This triggers the mast cells to release powerful chemicals like histamines. Histamines cause the allergic symptoms like itching and runny nose. Answer : (d)
Q.32
It helps in differentiation of cells of immunity to digestive tract against antigens? … [ Guj CET 2008]
0%
a) IgG
0%
b) IgE
0%
c) IgA
0%
d) IgD
Explanation
Immunoglobulin A (IgA): It's found in the linings of the respiratory tract and digestive system, as well as in saliva (spit), tears, and breast milk. Immunoglobulin G (IgG): This is the most common antibody. It's in blood and other body fluids, and protects against bacterial and viral infections. IgG can take time to form after an infection or immunization. Immunoglobulin E (IgE): Normally found in small amounts in the blood. There may be higher amounts when the body overreacts to allergens or is fighting an infection from a parasite. Immunoglobulin D (IgD): This is the least understood antibody, with only small amounts in the blood. Answer : (c)
Q.33
Immunological destruction of body tissue product due to antibodies reacting with same as antigen is called …[ MHTCET 2010]
0%
a) Anaphylaxis
0%
b) Autoimmune disease
0%
c) Prophylaxis
0%
d) Immuno-deficiency disease
Explanation
An autoimmune disease is a condition in which your immune system mistakenly attacks your body. Anaphylaxis is a severe allergic reaction to venom, food, or medication. Anaphylaxis causes a series of symptoms, including a rash, low pulse, and shock, which is known as anaphylactic shock. Preventive healthcare, or prophylaxis, consists of measures taken for disease prevention. An immune deficiency disease occurs when the immune system is not working properly. Answer : (b)
Q.34
Fermentation for industrial production of ethanol is carried out by …. [ CBSE 2000]
0%
a) Saccharomyces
0%
b) Lactobacillus
0%
c) Streptomyces
0%
d) Acetobacter
Explanation
Current industrial ethanol fermentation is mainly carried out with the yeast Saccharomyces cerevisiae because of its hardiness (low pH and high ethanol tolerance), although the bacterium Zymomonas mobilis has a higher specific ethanol productivity and yield from glucose and sucrose. Answer : (a)
Q.35
Enzyme responsible for replication of HIV in macrophages is … [ CET Chd. 2009]
0%
a) RNA polymerase
0%
b) DNA ligase
0%
c) DNA polymerase
0%
d) Reverse transcriptase
Explanation
Once HIV goes inside a T helper cells cell, HIV releases and uses reverse transcriptase (an HIV enzyme) to convert its genetic material—HIV RNA—into HIV DNA. Answer : (d)
Q.36
Widal test is used for the diagnosis of … [ CBSE 2010]
0%
a) Typhoid
0%
b) Plague
0%
c) Pneumonia
0%
d) Diphtheria
Explanation
The Widal test is one method that may be used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Answer : (a)
Q.37
Toxin produced by tetanus affects … [ AIIMS 1992]
0%
a) Voluntary muscles
0%
b) Involuntary muscles
0%
c) Both voluntary and involuntary
0%
d) Jaw bones
Explanation
Once inside inhibitory nerve terminals, tetanus toxin cleaves VAMP , thereby inhibiting the release of GABA and glycine. The result is a partial, functional denervation of the lower motor neurons, which leads to their hyperactivity and to increased muscle activity in the form of rigidity and spasms of the voluntary muscles Answer : (a)
Q.38
Antibodies are complex … [ CBSE 2006]
0%
a) Lipoproteins
0%
b) Steroids
0%
c) Prostaglandins
0%
d) Glycoproteins
Explanation
Glycoproteins are proteins which contain oligosaccharide chains (glycans) covalently attached to amino acid side-chains. The carbohydrate is attached to the protein in a cotranslational or posttranslational modification. Lipoproteins are complex particles that have a central hydrophobic core of non-polar lipids, primarily cholesterol esters and triglycerides. Steroid, any of a class of natural or synthetic organic compounds characterized by a molecular structure of 17 carbon atoms arranged in four rings. The prostaglandins are made up of unsaturated fatty acids that contain a cyclopentane (5-carbon) ring and are derived from the 20-carbon, straight-chain, polyunsaturated fatty acid precursor arachidonic acid. Answer : (d)
Q.39
Which of the following diseases has been eradicated? …[ CBSE 1997]
0%
a) Plague
0%
b) Poliomyelitis
0%
c) Small pox
0%
d) Kala-azar
Explanation
Smallpox was officially declared eradicated in 1980 and is the first disease to have been fought on a global scale. Answer : (c)
Q.40
HIV decreases natural immunity by …. [ BHU 2008]
0%
a) Attacking B-lymphocytes
0%
b) Destroying antibodies
0%
c) Attacking T-lymphocytes
0%
d) Destroying erythrocytes
Explanation
HIV decreases natural immunity by Attacking T-lymphocytes Human Immunodeficiency Virus (HIV) specifically attacks Helper T cells. Without an adequate supply of Helper T cells, the immune system cannot signal B cells to produce antibodies or Cytotoxic T cells to kill infected cells. Answer : (c)
Q.41
Every time when the dosage of drug has to be increased to achieve the same kick that initially occurred in response to a smaller dose, the condition is known as … ..[ KCET 2010]
0%
a) Addiction
0%
b) Drug tolerance simply means that a person's reaction to a drug decreases as they continue to use it. A person with a drug tolerance has to take larger doses in order to achieve the same effect as they did earlier in their drug use. Drug tolerance is not addiction.
0%
c) Withdrawal symptom
0%
d) Rebound effect
Explanation
Drug tolerance simply means that a person's reaction to a drug decreases as they continue to use it. A person with a drug tolerance has to take larger doses in order to achieve the same effect as they did earlier in their drug use. Drug tolerance is not addiction. Answer : (b)
Q.42
Which of the following is a bacterial disease? .. [ HPPMT 2005]
0%
a) Anthrax
0%
b) Rinderpest
0%
c) Tick fever
0%
d) Coccidiosis
Explanation
Anthrax is a serious infectious disease caused by gram-positive, rod-shaped bacteria known as Bacillus anthracis. Rinderpest, also known as cattle plague, is a contagious viral disease affecting cloven- hoofed animals mainly cattle and buffalo. Rinderpest is caused by a virus of the family Paramyxoviridae, genus Morbillivirus. Colorado tick fever is caused by the Colorado tick fever virus. Coccidiosis is a parasitic disease of the intestinal tract of animals caused by coccidian protozoa. Answer : (a)
Q.43
A noninfectious unnatural and unusual reaction to a substance or condition is … [ AIIMS 1993]
0%
a) immunity
0%
b) Allergy
0%
c) Infection
0%
d) Toxin
Explanation
Allergy is a damaging immune response by the body to a substance, especially a particular food, pollen, fur, or dust, to which it has become hypersensitive. Answer : (b)
Q.44
Select the viral disease … [ JKCMEE 2000]
0%
a) Diabetes
0%
b) tetanus
0%
c) Leprosy
0%
d) Poliomyelitis
Explanation
Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus. The virus spreads from person to person and can infect a person's spinal cord, causing paralysis Answer : (d)
Q.45
Antigen binding site in an antibody is found between … [ AIIMS 2008]
0%
a) Two light chains
0%
b) Two heavy chains
0%
c) One heavy and one light chain
0%
d) Both B and C depending upon nature of antigens
Explanation
Answer : (c)
Q.46
What is the function of lymphocytes … [ RPMT 2006]
0%
a) Destruction of poisonous substance
0%
b) Description of bacteria
0%
c) Destruction of RBC
0%
d) None of the above
Explanation
Answer : (b)
Q.47
Relative Biological Effectiveness (RBE) usually refers to damage caused by … [ AIIMS 2007]
0%
a) Radiation
0%
b) Low temperature
0%
c) High temperature
0%
d) Pollution
Explanation
Relative biological effectiveness (RBE) is defined as the ratio of a dose of standard radiation to the dose of test radiation to produce the same biological effects. DX is a reference absorbed dose of radiation of a standard type X DR is the absorbed dose of radiation of type R that causes the same amount of biological damage Answer : (a)
Q.48
Organ transplant rejection is prevented by … [ Odisha 2003]
0%
a) Antibodies
0%
b) New T-cells
0%
c) Immunostimulatory drugs
0%
d) Immunosuppressant drug
Explanation
After an organ transplant, patients need to take immunosuppressant (anti-rejection) drugs. These drugs help prevent your immune system from attacking ("rejecting") the donor organ. Immunosuppressant drugs are used to treat autoimmune diseases. With an autoimmune disease, the immune system attacks the body's own tissue. Because immunosuppressant drugs weaken the immune system, they suppress this reaction. This helps reduce the impact of the autoimmune disease on the body. Answer : (d)
Q.49
Bronchogenic carcinoma is the cancer of …
0%
a) Breast
0%
b) Intestine
0%
c) Lungs
0%
d) Liver
Explanation
Bronchogenic carcinoma is the cancer of Lungs Bronchogenic carcinoma is a malignant neoplasm of the lung arising from the epithelium of the bronchus or bronchiole. Pathology. Bronchogenic carcinomas begin as a small focus of atypical epithelial cells within the bronchial mucosa. Answer : (c)
Q.50
Choose the wrong statement regarding AIDS … [ kerala 2009]
0%
a) It is an immunodeficiency disease
0%
b) It is caused by retrovirus HIV
0%
c) HIV selectively infects and kills B-lymphocytes
0%
d) Genome RNA replicates via DNA intermediate
Explanation
HIV infects a type of white blood cell in the body's immune system called a T-helper cell (also called a CD4 cell). These vital cells keep us healthy by fighting off infections and diseases. HIV cannot reproduce on its own. Instead, the virus attaches itself to a T-helper cell and fuses with it (joins together). Answer : (c)
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