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CBSE Questions for Class 12 Medical Biology Human Health And Disease Quiz 11 - MCQExams.com
CBSE
Class 12 Medical Biology
Human Health And Disease
Quiz 11
Roundworm infection produces
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0%
Vague symptoms of nausea, abdominal pain and vomiting
0%
Clear symptoms of abdominal pain and abdominal obstruction
0%
Anaemia and weakness even in light infection
0%
Pneumonia and peritonitis in all cases
Addiction to tabacco is caused by
Report Question
0%
Cocaine
0%
Nicotine
0%
Caffeine
0%
Histamine
Explanation
Tobacco is obtained from dried and cured leaves of young branches of two different species of tobacco plant
Nicotiana rustica
and
Nicotiana tobaccum
. Tobacco contains nicotine which is a addictive chemical. It increases the secretion of dopamine, a neurotransmitter. It also causes an increased rush of adrenaline in body. Tobacco is used in the form of cigars, cigarettes, beedi, gutka, hookah etc. It is highly addictive and long term usage can harm the brain.
So, the correct answer is 'Nicotine'.
HIV has a protein coat and a genetic material which is
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ss DNA
0%
ds DNA
0%
ss RNA
0%
ds RNA
Explanation
AIDS (acquired immunodeficiency syndrome) is caused by the HIV virus.
HIV (Human immunodeficiency virus)belongs to the special class of viruses called retrovirus.with in this class HIV is placed in a subgroup called lentivirus.
HIV consists of a viral envelope.with in the viral envelope 2 identical copies of single-stranded RNA are a present and reverse transcriptase enzyme. Hence HIV has a protein coat and a genetic material which is ss RNA.
So, the correct answer is 'ss RNA'.
AIDS virus spreads in the body through
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0%
Suppressor T-cells
0%
Carrier T-cells
0%
Helper T-cells
0%
Killer T-cells
Explanation
AIDS (acquired immunodeficiency syndrome) is caused by the HIV virus.
T-helper cells play an important role in adaptive immunity. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.
HIV destroys (CD4+ cells) T-helper cells. They're responsible for keeping us healthy from common diseases and infections. As HIV gradually weakens natural defences, signs and symptoms will occur. Hence AIDS is due to a reduction in the number of helper T-cells. Hence AIDS virus spreads in the body through Helper T-cells.
So, the correct answer is 'Helper T-cells'.
Which of the following are involved in body defense?
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Neutrophils
0%
Macrophages
0%
Lymphocytes
0%
All of the above
Explanation
In our body, neutrophils, macrophages and lymphocytes are involved in the second line of defence. They produce non-specific immune responses such as fever and inflammatory response.
Neutrophils are a type of WBC and they form an essential part of the innate immune system. Neutrophils are one of the first-responders of inflammatory cells to migrate towards the site of inflammation.
Macrophages are the type of WBC which engulfs and digests cellular debris, foreign substances, microbes etc..
Lymphocytes are a type of WBC. It includes natural killer cells (which function in cell-mediated, cytotoxic innate immunity), T cells (for cell-mediated, cytotoxic adaptive immunity), and B cells (for humoral, antibody-driven adaptive immunity).
So, the correct answer is 'All of the above'.
An antigen is a
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A foreign molecule
0%
A enzyme
0%
A polysaccharide
0%
A microorganism
Explanation
An antigen is a foreign substance which are specifically bound by antibodies. Antigens are targeted by antibodies. Each antibody is specifically produced by the immune system to match an antigen after cells in the immune system come into contact with it, this allows a precise identification or matching of the antigen. Antigens are usually proteins, peptides and polysaccharides.
So, the correct answer is 'A foreign molecule'.
HIV decreases natural immunity by
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0%
Attacking B-lymphocytes
0%
Destroying antibodies
0%
Attacking T-lymphocytes
0%
Destroying erythrocytes
Explanation
AIDS (acquired immunodeficiency syndrome) is caused by the HIV virus.
T-helper cells play an important role in adaptive immunity. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.
HIV destroys (CD4+ cells) T-helper cells. They're responsible for keeping you healthy from common diseases and infections. As HIV gradually weakens your natural defences, signs and symptoms will occur. Hence AIDS is due to a reduction in the number of helper T-cells. Hence HIV decreases natural immunity by attacking T-lymphocytes.
So, the correct answer is 'Attacking T- lymphocytes'.
Some protection is provided against carcinogens by
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Penicilic acid
0%
Afflatoxin
0%
Streptomycin
0%
Tocopherol / Vitamin E
Explanation
Vitamin E is a group of eight fat-soluble compounds that include four tocopherols and four tocotrienols. It is estimated that vitamin E provides protection against carcinogens but the mechanism is not clearly understood. Gamma-tocotrienol, a cofactor found in natural vitamin E preparations, may decrease prostate tumour formation.
So, the correct answer is 'Tocopherol/ Vitamin E'.
AIDS virus found in India is
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HIV-1
0%
HIV-2
0%
HIV-3
0%
HIV-4
Explanation
'AIDS (acquired immunodeficiency syndrome) is caused by the HIV virus. It breaks down the body immune system, leaving the patient vulnerable to a host of life-threatening opportunistic infections.
The first AIDS cases in the world were reported in the United States in June 1981.
In India, in the year 1986, the first known case of HIV was diagnosed by Dr Suniti Solomon and her student Dr Sellappan Nirmala amongst female sex workers in Chennai, The virus found was HIV-1.
Hence AIDS virus found in India is HIV-1.
So, the correct answer is 'HIV-1'
A molecule that produces an immune response is
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0%
Antigen
0%
Antibody
0%
Carcinogen
0%
Mutagen
Explanation
An antigen is a foreign substance which produces an immune response and is specifically bound to antibodies. Each antibody is specifically produced by the immune system to match an antigen after cells in the immune system come into contact with it, this allows a precise identification or matching of the antigen. Antigens are usually proteins, peptides and polysaccharides which elicit an immune response.
So, the correct answer is 'Antigen'.
Which of the following is an autoimmune disease:
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Rheumatoid arthritis
0%
Multiple sclerosis
0%
Type I diabetes
0%
All of the above
Explanation
An autoimmune disease is a condition arising from an abnormal immune response to normal body parts. Common symptoms include low-grade fever and feeling tired.
Rheumatoid arthritis is a long-term autoimmune disorder that primarily affects joints. It typically results in warm, swollen, and painful joints.
Multiple sclerosis is the most common autoimmune disorder affecting the central nervous system. Multiple sclerosis is a demyelinating disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged.
Type 1 diabetes is an autoimmune disease as in this condition the immune system destroys the body's own insulin-making cells present in the pancreas. This results in the dysregulation of blood-sugar level.
Symptoms include frequent urination, increased thirst, and increased hunger. It is an autoimmune disease in which pancreatic beta cells are destroyed.
So, the correct answer is 'All of the above'.
Ailment related to tobacco addiction is
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0%
Gastric and duodenal ulcer
0%
Bronchtis
0%
Emphysema
0%
All of the above
Explanation
Tobacco addiction by smoking can cause many ailments. It can trigger the secretion of gastric juices which cause gastric and duodenal ulcers, the open sores in the walls of gastrointestinal tract. Smoking also causes inflammation of alveoli of lungs due to which surface area for gaseous exchange gets reduced and this causes emphysema. Smoking also causes inflammation of mucosa of bronchi causing difficulty in breath. This condition is called bronchitis.
So, the correct answer is 'All of the above'.
A person is suffering from frequent episodes of nasal discharge ,nesal congestion , reddening of eyes and watery eyes.These are symptoms are
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0%
Bronchial carcinoma
0%
Rhinitis
0%
Bronchitis
0%
Cyanosis
Explanation
Allergic rhinitis, also known as hay fever is a type of inflammation in the nose which occurs when the immune system hypersensitizes to allergens in the air. Signs and symptoms include nasal discharge, nasal congestion, sneezing; red, itchy, and watery eyes and swelling around the eyes. Allergic rhinitis is typically triggered by environmental allergens such as pollen, pet hair, dust etc..
So, the correct answer is 'Rhinitis'.
Lymphatic filariasis is caused by
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0%
Wuchereria
0%
Ascaris
0%
Taenia
0%
Fasciola
Explanation
Lymphatic filariasis, also known as elephantiasis is a human disease caused by parasitic worms such as Wuchereria bancrofti (most common), Brugia malayi, and Brugia timori. Symptoms include severe swelling in the arms, legs, breasts, or genitals. The worms are spread by the bites of infected mosquitoes (such as female Culex).
So, the correct answer is 'Wuchereria'.
Which one provides non-specific defence against pathogens?
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T-cells
0%
Phagocytes
0%
B-cells
0%
Stem cells
Explanation
Phagocytes are cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells. They are essential for fighting infections and for subsequent immunity. Phagocytes provide the second line of defence which is considered as a non-specific defence because it destroys invaders in a generalized way without targeting specific pathogens. Phagocytes are activated when the pathogen is able to cross the first line of defence.
So, the correct answer is 'Phagocytes'.
Neutrophilis secrete chemicals for attracting neutrophilis ,monocytes ,eosinophilis ,attachment to endothelium and dilating capillaries
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0%
Cytokines
0%
Monokines
0%
Leucotrienes
0%
Lymphokines
Explanation
Neutrophils are the most abundant type of granulocytes. They form an essential part of the innate immune system. Neutrophils undergo a process called chemotaxis via amoeboid movement, which allows them to migrate toward sites of infection or inflammation. Neutrophils express and release cytokines, which in turn amplify inflammatory reactions by allowing other neutrophils, monocytes, eosinophils attachment to endothelium and dilation of capillaries is seen to increase the blood flow to the affected area.
So, the correct answer is 'Cytokines'.
Which substance forms antibody when introduced into the human body?
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Antigen
0%
Antibody
0%
Histamine
0%
Both A and B
Explanation
An antigen is a foreign substance which is specifically bound by antibodies. Antigens are targeted by antibodies. Each antibody is specifically produced by the immune system to match an antigen after cells in the immune system come into contact with it, this allows a precise identification or matching of the antigen. Antigens are usually proteins, peptides and polysaccharides.
So, the correct answer is 'Antigen'.
Which of the following is released initially as an inflammatory response?
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Interferon
0%
Chitin
0%
Cytokines
0%
Cytokinin
Explanation
Cytokines are a broad category of small proteins that are important in cell signalling. Their release has an effect on the behaviour of cells around them. Proinflammatory cytokines are produced predominantly by activated macrophages and are involved in the up-regulation of inflammatory reactions. There is abundant evidence that certain pro-inflammatory cytokines such as IL-1β, IL-6, and TNF-α are involved in the process of pathological pain.
So, the correct answer is 'Cytokines'.
Saliva and tears are examples of .......... barriers (under innate immunity).
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Chemical barriers
0%
Physical barriers
0%
Cytikine barriers
0%
Cellular barriers
Explanation
Chemical barriers protect against infection. The skin and respiratory tract secrete antimicrobial peptides such as the β-defensins. Enzymes such as lysozyme and phospholipase A2 in saliva, tears, and breast milk are antibacterial substances.
Vaginal secretions serve as a chemical barrier following menarche, when they become slightly acidic, while semen contains defensins and zinc to kill pathogens.
In the stomach, gastric acid serves as a powerful chemical defence against ingested pathogens.
An example of innate immunity is
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PMNL-neutrophilis
0%
B-lymphocytes
0%
T-lymphocytes
0%
TH-cells
Explanation
Innate immunity refers to nonspecific defence mechanisms that come into play immediately or within hours of an antigen's appearance in the body. These mechanisms include physical barriers such as skin, chemicals in the blood, and immune system cells such as neutrophils that attack foreign cells in the body. Polymorphonuclear leukocytes (PMNL - neutrophils) are the granulocytes characterized by the presence of granules in their cytoplasm. They provide innate immunity.
So, the correct answer is 'PMNL-neutrophils'.
Which of the following is an autoimmune disease
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Arthritis
0%
Erythroblastosis foetalis
0%
Diabetes Type 1
0%
Rheumatoid arthritis
0%
Asthma
Explanation
Type 1 diabetes is an autoimmune disease. The pancreas can't make insulin because the immune system attacks it and destroys the cells that produce insulin.
Rheumatoid arthritis, or RA, is an autoimmune and inflammatory disease, which means that your immune system attacks healthy cells in your body by mistake, causing inflammation (painful swelling) in the affected parts of the body.
Cancer is a
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0%
Air borne
0%
Viral disease
0%
Environmental disorder
0%
Cellular disease
Explanation
Cancer is a group of diseases involving abnormal and rapid cell growth with the potential to invade or spread to other parts of the body. Signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss and a change in bowel movements. Many cancers can be prevented by not smoking, maintaining a healthy weight, not drinking too much alcohol, eating plenty of vegetables, fruits and whole grains, vaccination against certain infectious diseases.
So, the correct answer is 'Cellular disease'.
Athlete's foot is also called
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Tinea pedis
0%
Tinea capitis
0%
Rickettsia
0%
Candida albicans
Explanation
Athlete's foot is a fungal infection that affects the upper layer of the skin of the foot, especially when it is warm, moist and irritated.
It is caused by the fungus 'Trichophyton'.
Trichophyton rubrum is the most common fungus that causes Athlete's foot.
Symptoms include Itching and burning, dry skin, scaling, Inflammation, Blisters lead to cracking of the skin.
Athlete's foot is also called as Tinea pedis, Tinea pedum, Ringworm of the foot.
So, the correct answer is 'Tinea pedis'.
After entering T-cell, HIV first forms
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m RNA
0%
ss DNA
0%
ds DNA
0%
ds RNA
Explanation
Solution:
Answer B: ss DNA(single stranded DNA)
HIV virus attaches to the T helper cells; then fuses with it, take control of DNA, replicates itself and releases move HIV in to blood.
Ringworm in humans caused by
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Fungi
0%
Nematodes
0%
Viruses
0%
Bacteria
Explanation
Correct Option: A
Explanation:
Ringworm is a common
fungal
skin illness that is not caused by the
worm
. The disease is called from the location of the infection in the body.
It creates a
scaly
,
crusted
rash on the skin, which may look as circular, red spots.
Hence, Ringworm in humans is caused by Fungi.
Use of antihistamines and steroid give a quick relief from
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0%
Nausea
0%
Headache
0%
Allergy
0%
Cough
Explanation
Antihistamines are drugs which are used to treat allergic rhinitis and other allergies. Antihistamines can give relief when a person has nasal congestion, sneezing, or hives because of pollen, dust mites, or animal allergy. Histamine is mostly responsible for allergic reactions. Antihistamines block the action of histamines.
A steroid is a biologically active organic compound. Steroids such as corticosteroids are used in the treatment of allergic reactions by reducing inflammation associated with allergies. They prevent and treat nasal stuffiness, sneezing, and itchy, runny nose due to seasonal or year-round allergies. They can also decrease inflammation and swelling from other types of allergic reactions
So, the correct answer is 'Allergy'.
Lips of
Ascaris
are
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One dorsal and two ventrolateral
0%
One dorsal and one ventral
0%
Two dorsal and one ventrolateral
0%
Two dorsal and two ventral
Explanation
The mouth of Ascaris is a triradiate aperture located at the anterior end of the body. It is guarded by three lips or labia, one dorsal and two ventroventral as shown in the representative diagram.
Which of the following is not an autoimmune disease?
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Graves disease
0%
Pernicious anaemia
0%
Rheumatoid arthritis
0%
Insomnia
Explanation
An autoimmune disease is a condition in which your immune system mistakenly attacks your body. For example, Graves disease, Pernicious anemia and Rheumatoid arthritis.
Insomnia is a sleep disorder that is characterized by difficulty falling or staying asleep.
Symptoms include difficulty falling asleep, waking up during sleep and trouble going back to sleep, waking up too early in the morning and feeling tired upon waking.
Anxiety, stress, and depression are some of the most common causes of chronic insomnia.
Hence insomnia is not an autoimmune disease.
So, the correct answer is 'Insomnia'.
Fourth moulting of
Ascaris
occurs in
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Lung
0%
Liver
0%
Intestine
0%
Soil
Explanation
Ascaris is a genus of parasitic nematode worms. The larvae undergo first moulting in the soil. Then the larvae undergo second and third moulting in the lungs. Then, fourth moulting occurs in host intestine. 2nd stage larva goes from soil to lungs. 4th stage larva goes from lungs to intestine. Sometimes the 2nd stage larva from the lungs travels to the CSF (cerebrospinal fluid) via the heart.
So, the correct answer is 'Intestine'.
Ringworm infection is caused by
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0%
Wuchereria
0%
Trichophyton
0%
Ascaris
0%
Aedes
Explanation
Trichophyton is a genus of fungi which includes the parasitic diseases that cause athlete's foot, ringworm, jock itch, and similar infections of the nail, beard, skin and scalp. Dermatophytosis, also known as ringworm is a fungal infection of the skin. Typically it results in a red, itchy, scaly, circular rash. Hair loss may occur in the area affected. Ringworm can spread from other animals or between people.
So, the correct answer is 'Trichophyton'.
Select the statement about diseases and immunisation
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If due to some reason,B-and T-lymphocytes are damaged the body will not produce antibody against a pathogen
0%
Injection of dead/inactivated pathogens causes passive immunity
0%
Certain protozoans have been used in mass production of hepatitis-B vaccine
0%
Injection of snake antivenom against snake bite is an example of active immunisation
Explanation
B cells, also known as B lymphocytes are a type of white blood cell. A BCR (B-cell receptor) binds an antigen. Then the antigen is taken up into the B cell through receptor-mediated endocytosis, degraded, and presented to T cells as peptide pieces in complex with MHC-II molecules on the cell membrane. If B and T- lymphocytes are damaged, the body will not be able to produce antibody against pathogen because antibodies are produced from B-lymphocyte.
So, the correct answer is 'If due to some reason, B-and T-lymphocytes are damaged the body will not produce an antibody against a pathogen'.
Ringworms are caused by
(I)
Wuchereria
(II)
Microsporum
(III)
Haemophilus
(IV)
Epidermophyton
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0%
I and II
0%
II and III
0%
III and IV
0%
I and IV
0%
II and IV
Explanation
Ringworm is a contagious fungal infection caused by mould-like parasites that live on the cells in the outer layer of your skin. It can be spread from Human to human. Ringworm often spreads by direct, skin to skin contact with an infected person. It is caused by Haemophilus and Epidermophyton. Hence, Ringworms are caused by Haemophilus and Epidermophyton.] So, the correct answer is 'III and IV'.
The drug used in ascariasis is
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0%
Sheesham oil
0%
Oil of Chenopodium
0%
Chloroquine
0%
Tarcamphor
Explanation
Ascariasis is a disease caused by the parasitic roundworm Ascaris lumbricoides. Symptoms include shortness of breath, fever, abdominal swelling, abdominal pain, and diarrhoea. Oil of chenopodium is used in the treatment of Ascariasis. Oil of chenopodium is extracted from the seeds of Chenopodium ambrosioides. Chenopodium is a genus of numerous species of perennial or annual herbaceous flowering plants known as the goosefoots, which occur almost anywhere in the world.
So, the correct answer is 'Oil of Chenopodium'.
Study the following traits of a disorder and identify the disorder.
(a) Inflammation of the mucous membrane of the nasal passage
(b) Watery secretions by mucous glands
(c) Continuous sneezing
(d) Eye watering
(e) Rise in body temperature
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0%
Rhinitis
0%
Bronchial carcinoma
0%
Emphysema
0%
Bronchial asthma
Explanation
Allergic rhinitis, also known as hay fever, is a type of inflammation in the nose which occurs when the immune system hypersensitizes to allergens in the air. Signs and symptoms include a runny or stuffy nose, sneezing, red, itchy, and watery eyes, and swelling around the eyes. inflammation of mucous membrane of the nose, fever.
So, the correct answer is 'Rhinitis'.
Body cells infected by viruses are destroyed mostly by
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0%
IgA
0%
Phagocytes
0%
Natural antibodies
0%
Natural Killer cells
Explanation
Immunity to viral infection is caused by a variety of specific and nonspecific mechanisms.
The activation of different immune functions and the duration and magnitude of the immune response depending on how the virus interacts with host cells.
Cytotoxic T lymphocytes, natural killer (NK) cells and antiviral macrophages can recognize and kill virus-infected cells.
Hence, Body cells infected by viruses are destroyed mostly by Natural Killer cells.
So, the correct answer is 'Natural Killer cells'.
Which one is correct statement with reference to Ascaris
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Monogenetic ,dimorphic ,pseudocoelomate and colozioc parasite
0%
Monogenetic ,dimorphic ,coelomate and histozioc parasite
0%
Digenetic ,dimorphic ,pseudocoelomate and histozioc parasite
0%
Digenetic ,dimorphic ,coelomate and histozioc parasite
Explanation
Ascaris is a Monogenic parasite as it completes their life cycle in only one individual host i.e in humans.
Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs. And Ascaris is dimorphic.
The pseudocoelom is a fluid-filled body cavity lying inside the external body wall of the nematode(Ascaris) that bathes the internal organs, including the alimentary system and the reproductive system.
The coelozoic parasite lives within the cavities of the host's body. They are called enterozoioc if they live in the alimentary canal. e.g. Ascaris lumbricoides in the large intestine.
Hence, Monogenetic, dimorphic, pseudocoelomate and colonic parasite is a correct statement with reference to Ascaris.
So, the correct answer is 'Monogenetic, dimorphic, pseudocoelomate and colonic parasite'.
Natural killer lymphocytes are an example for
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Physiological barrier
0%
Cellular barrier
0%
Cytokine barrier
0%
Physical barrier
Explanation
Leukocytes (white blood cells) act like independent, single-celled organisms i.e cellular barriers and are the second arm of the innate immune system.
The innate leukocytes include the phagocytes (macrophages neutrophils and dendritic cells), innate lymphoid cells, mast cells, eosinophils, basophils, and natural killer cells.
Hence, Natural killer lymphocytes are an example of Cellular barrier.
So, the correct answer is 'Cellular barrier'.
Rhabditiform larva of
Ascaris
undergoes second and third moultings in_________
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0%
Liver
0%
Heart
0%
Alveoli of lungs
0%
Small intestine
Explanation
This
larva
does not have the power of infection. It becomes moulted into
second
stage
larvae
which infect the host through consumption of contaminated food and water. In the alveoli of lungs, it
undergoes
the
2nd moulting
to produce the
3rd
stage
larva
.
Internal bleeding ,muscular pain, blockage of intestinal passage and anaemia are symptoms of infection by ___________
Report Question
0%
Wuchereria
0%
Trichophyton
0%
Ascaris
0%
Plasmodium
Explanation
Ascaris
is a genus of parasitic nematode worms known as the "small intestinal roundworms", which is a type of parasitic worm.
Symptoms include: Abdominal discomfort. Abdominal cramping. Abdominal swelling (especially in children) Internal bleeding muscular pain, blockage of intestinal passage Coughing and/or wheezing Fever and anaemia.
Hence, Internal bleeding, muscular pain, blockage of intestinal passage and anaemia are symptoms of infection by
Ascaris.
So, the correct answer is '
Ascaris'.
The cytokine barrier among these is
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0%
Polymorphonuclear neutrophil
0%
Monocyte
0%
NK cells
0%
Interferon
0%
Macrophage
Explanation
Cytokine inhibits viral replication.
They form an innate immune system by forming physical barriers.
Virus-infected cells secrete proteins called interferons which protect non-infected cells from a further viral infection is a cytokine barrier. Hence, The cytokine barrier among these is interferon.
Sp, the correct answer is 'interferon'.
Which of the following is not a component of nonspecific defense?
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0%
Mucous membrane
0%
Phagocutosis
0%
Lusozome
0%
Killer T-cells
Explanation
The second line of defence involves non-specific cellular and molecular responses of the innate immune system because these defences do not differentiate between different types of the pathogen and respond the same way upon every infection. Mucous membrane, phagocytes and lysozyme are all involved in a non-specific defence mechanism, whereas, killer T-cells or cytotoxic T-cells provide the third line of defence.
So, the correct answer is 'Killer T-cells'.
The illegal use of medicinal product is called as
Report Question
0%
Alcohol abuse
0%
Drug abuse
0%
Medicine abuse
0%
None of the above
Explanation
Drug abuse is the non-permissive consumption of certain substances or medicinal products that may lead to physical and psychological dependence.
Commonly abused drugs include marijuana, cocaine, heroin, alcohol, prescription drugs, etc.
The commonly used illegal drug is Marijuana.
Signs of drug abuse are bloodshot eyes, pupils larger or smaller than usual, change is sleep patterns, unusual smells on breath, impaired coordination, etc.
Hence The illegal use of the medicinal product is called Drug abuse.
So, the correct answer is 'Drug abuse'.
Animals of which phylum are pseudocoelomate?
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0%
Porifera
0%
Platyhelminthes
0%
Aschelminthes
0%
Mollusca
Which of the following can cause cancer?
Report Question
0%
Brown sugar
0%
Opium
0%
Cocaine
0%
Cannabis
Explanation
Cocaine is also known as coke. It is a strong stimulant mostly used as a recreational drug.
It is commonly snorted, inhaled as smoke, or dissolved and injected into a vein.
Mental effects may include loss of contact with reality, an intense feeling of happiness, or agitation.
Physical symptoms may include a fast heart rate, sweating, and large pupils. High doses can result in very high blood pressure or body temperature.
Its usage increases the risk of stroke, myocardial infarction, lung problems in those who smoke it, blood infections, cancer and sudden cardiac death.
Hence, Cocaine can cause cancer.
So, the correct answer is 'Cocaine'.
which of the following is correct regarding AIDS causative HIV
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HIV does not escape but attacks the acquire immunity response
0%
HIV is enveloped virus containing one molecule of single RNA and one molecule of reverse transcriptase
0%
HIV is enveloped virus that contains two identical molecules of single stranded RNA and two molecules of reverse trancriptase
0%
HIV is uneneveloped retrovirus
Explanation
Vaccines typically work by triggering the immune system to produce antibodies that help to beat infections.
But most antibodies can't secure and neutralize HIV.
The proteins on the surface of the virus mutate rapidly and change shape continuously.
Hence, HIV does not escape but attacks the acquire immunity response is correct regarding AIDS causative HIV.
So, the correct answer is 'HIV does not escape but attacks the acquire immunity response'.
Which one of the following belongs to retrovirus group?
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0%
Dengue virus
0%
Hepetitis virus
0%
Influenza virus
0%
HIV
Explanation
A retrovirus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that it invades, thus changing the genome of that cell.
Such viruses are either single-stranded RNA (e.g. HIV) or double-stranded DNA (e.g. Hepatitis B virus) viruses.
In most viruses, DNA is transcribed into RNA, and then RNA is translated into protein.
However, retroviruses function differently, as their RNA is reverse-transcribed into DNA, which is integrated into the host cell's genome (when it becomes a provirus), and then undergoes the usual transcription and translational processes to express the genes carried by the virus. Hence, HIV belongs to the retrovirus group.
So, the correct answer is 'HIV'.
The first alkaloid to be isolated and crystallized was.
Report Question
0%
Nicotine
0%
Quinine
0%
Morphine
0%
Colchicines
Drug affects
Report Question
0%
Nervous System
0%
Locomotory system
0%
Excretory system
0%
None of the above
Explanation
The drug is a medicine or other substance which has a physiological effect when ingested or otherwise introduced into the body.
After prolonged preadaptation or after stimulation with I.P. amphetamine the several measures of locomotor activity in rats was seen which includes the distance covered, movement time, speed of progression, and sinuosity showed significant changes in extreme situations.
Hence, the drug affects Locomotory system.
So, the correct answer is 'Locomotory system'.
In higher vertebrates the immune system can distinguish self cells from nonself ones.If this property is lost due to genetic abnormality and it attacks self cells , it leads to
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0%
Active immunity
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Allergic response
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Graft rejection
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Auto immune disease
Explanation
An autoimmune disease is a condition arising from an abnormal immune response to normal body tissue. In an autoimmune disease, the immune system fails to recognize self-cells and produces antibodies against self-cells. Common symptoms include low-grade fever and feeling tired. Autoimmune disease is due to genetic abnormality or other environmental factors.
So, the correct answer is 'Autoimmune disease'.
Consider the following plants.
a. Cannabis
b. Leucaena leucocephala
c. Morux albci
d. Cocos nucifera
Among these the one(s) which can be called multipurpose plant(s) would include.
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$$4$$ alone
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$$1, 2$$ and $$3$$
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$$1, 2$$ and $$4$$
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$$1, 2, 3$$ and $$4$$
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Practice Class 12 Medical Biology Quiz Questions and Answers
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