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Science M.C.Q. [1 M]

Why Do we Fall Ill · Bihar Board (BSEB) STD 9 (BSEB - English Medium). 191 questions.

Questions · Page 3 of 4

M.C.Q. [1 M]

MCQ 1011 Mark
Edward Jenner developed $........:$
  • A
    Vaccination against polio
  • B
    Vaccination against tuberculosis
  • ✓
    Vaccination against smallpox
  • D
    Vaccination of malaria
Answer
Correct option: C.
Vaccination against smallpox
Edward Jenner was an English doctor, who found that vaccination with cowpox can protect individuals from smallpox.
He is well known for his contribution to the immunization and eradication of smallpox.
Jenner's work is widely regarded as the foundation of immunology and known as the father of immunology.
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MCQ 1021 Mark
Peptic ulcers are caused by:
  • ✓
    Bacterium, Helicobacter pylori
  • B
    Virus
  • C
    Protozoan, Plasmodium vivax
  • D
    The deficiency of hormone
Answer
Correct option: A.
Bacterium, Helicobacter pylori
Helicobacter pylori $-$ is the bacterium that causes peptic ulcers.
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MCQ 1031 Mark
The organisms which carry the infectious agents from a sick person to another potential host are known as:
  • A
    Fomites
  • B
    Causative agents
  • ✓
    Vectors
  • D
    Vehicles
Answer
Correct option: C.
Vectors
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MCQ 1041 Mark
Which one is an acute disease:
  • A
    Diabetes.
  • B
    Tuberculosis.
  • C
    Hypertension.
  • ✓
    Typhoid.
Answer
Correct option: D.
Typhoid.
Typhoid fever is an acute illness associated with fever caused by the Salmonella typhi bacteria. It can also be caused by Salmonella paratyphi, a related bacterium that usually causes a less severe illness. The bacteria are deposited in water or food by a human carrier and are then spread to other people in the area.
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MCQ 1051 Mark
Which one of the following is not a viral disease?
  • A
    Dengue.
  • B
    $\text{AIDS}.$
  • ✓
    Typhoid.
  • D
    Influenza.
Answer
Correct option: C.
Typhoid.
Typhoid is a bacterial disease.
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MCQ 1061 Mark
Diseases are classified as $.......$ or $.......$ depending on their duration:
  • ✓
    Acute, chronic
  • B
    Infectious, non$-$infectious
  • C
    genetic, non$-$genetic
  • D
    All of the above
Answer
Correct option: A.
Acute, chronic
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MCQ 1071 Mark
Relief from the infectious disease will be obtained if:
  • A
    The person is healthy
  • ✓
    Course of the medicine is completed
  • C
    Medicine is taken only once
  • D
    None of the above
Answer
Correct option: B.
Course of the medicine is completed
When the patients get diagnosed with infection, the doctor will treat it with antibiotics. And the relief will only be achieved when you complete the course.
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MCQ 1081 Mark
$AIDS$ cannot be transmitted by
  • A
    Sexual contact.
  • ✓
    Hugs.
  • C
    Breast feeding.
  • D
    Blood transfusion.
Answer
Correct option: B.
Hugs.

Exchange of body fluids is necessary for transmission of $AIDS.$ Exchange of body fluids is not possible through hugs.
Hence, $AIDS$ cannot be transmitted by hugging.

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MCQ 1091 Mark
What is health?
  • A
    State of mental well being of the body.
  • B
    State of microbial well being of the body.
  • C
    State of physical well being of the body.
  • ✓
    Both $A$ and $C.$
Answer
Correct option: D.
Both $A$ and $C.$

According to $WHO,$ “health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.”
Health may be improved by promoting healthy behaviours like regular physical activity and getting enough sleep, as well as limiting or avoiding unhealthy activities like smoking or excessive stress.
Hence, health is a state of mental and physical well-being of the body.

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MCQ 1101 Mark
which one of the following reasons distinguishes a healthy person and a disease$-$free person?
  • ✓
    Proper functioning of body activities.
  • B
    Personal sanitation and hygiene.
  • C
    Health education and awareness.
  • D
    Social connectivity and mental stability.
Answer
Correct option: A.
Proper functioning of body activities.
 
  • Healthy is a state of physical, social and mental well being while disease free is a state of absence of body comfort.
  • A healthy person can be disease free but a disease free person cannot be a healthy person.
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MCQ 1111 Mark
Which disease is not transmitted by mosquitoes?
  • A
    Dengue.
  • B
    Malaria.
  • C
    Brain fever or encephalitis.
  • ✓
    Pneumonia.
Answer
Correct option: D.
Pneumonia.
Pneumonia is an inflammatory condition of lung affecting the lung alveoli. It is caused by a virus or bacteria. Symptoms include cough chest pain, fever and difficulty in breathing. Pneumonia is an air borne disease whereas dengue, malaria and brain fever are vector $($mosquito$)$ borne diseases.
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MCQ 1121 Mark
The process of vaccination was discovered by:
  • ✓
    Edward Jenner
  • B
    Robert Koch
  • C
    Louis Pasteur
  • D
    Alexander Flemming
Answer
Correct option: A.
Edward Jenner
Edward Jenner is well known around the world for his innovative contribution to immunization and the ultimate eradication of smallpox. Jenner is widely regarded as the Father of immunology.
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MCQ 1131 Mark
In a class, many children are exposed to the two students suffering from cold and cough, but only few of them catch the infection, while others do not. It is because:
  • A
    Their immune system fights/ wards off the infecting agent.
  • ✓
    They have nutritious and high calorie food.
  • C
    They live in very big houses and not in crowded places.
  • D
    They get safe drinking water.
Answer
Correct option: B.
They have nutritious and high calorie food.
Eating well, getting exercise and enough sleep, and managing stress might help you keep colds at bay.
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MCQ 1141 Mark
$\text{BCG}$ vaccine is used to curb:
  • A
    Pneumonia.
  • ✓
    Tuberculosis.
  • C
    Polio.
  • D
    Amoebiasis.
Answer
Correct option: B.
Tuberculosis.
Bacillus Calmette$-$Guerin vaccine is a vaccine primarily used against tuberculosis. In countries where tuberculosis is common, one dose is recommended in healthy babies as close to the time of birth as possible.
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MCQ 1151 Mark
The airborne diseases can be prevented from spreading by:
  • A
    Utilising safe drinking water.
  • B
    Proper disposal of excretory wastes.
  • ✓
    Avoiding visit to crowded places.
  • D
    All of the above.
Answer
Correct option: C.
Avoiding visit to crowded places.
Travel wisely. Don't fly when you're ill. With so many people confined to such a small area, you may infect other passengers in the plane. And your trip won't be comfortable, either. Depending on where your travels take you, talk to your doctor about any special immunizations you may need.
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MCQ 1161 Mark
An organism that transmits a disease from infected person to other potential host is called $.....:$
  • A
    Primary host
  • B
    Secondary host
  • C
    Parasite
  • ✓
    Vector
Answer
Correct option: D.
Vector
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MCQ 1171 Mark
Chronic diseases are said to stay for $.......$ duration:
  • A
    Short
  • ✓
    Long
  • C
    Fortnight
  • D
    Few days
Answer
Correct option: B.
Long
illness that can last for a long time, as much as a lifetime is called chronic disease. These are mainly caused due to severe metabolic disorders, genetic disorders, etc.
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MCQ 1181 Mark
Vectors can be defined as:
  • ✓
    Animals carry the infecting agents from sick person to another healthy person.
  • B
    Microorganisms which cause many diseases.
  • C
    Infected person.
  • D
    Diseased plants.
Answer
Correct option: A.
Animals carry the infecting agents from sick person to another healthy person.
Traditionally in medicine, a vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another. Species of mosquito, for example, serve as vectors for the deadly disease Malaria.
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MCQ 1191 Mark
Which one of the following disease is caused by bacteria?
  • A
    Typhoid.
  • B
    Anthrax.
  • C
    Tuberculosis.
  • ✓
    Malaria.
Answer
Correct option: D.
Malaria.
Malaria is caused by protozoa $($Plasmodium$).$
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MCQ 1201 Mark
‘Public cleanliness is important for individual health’. Which of the following is an example of this statement?
  • A
    Brushing our teeth and taking bath everyday keeps our body clean.
  • ✓
    Collecting and cleaning of garbage cans on the street regularly helps to prevent the spread of diseases.
  • C
    Clean rooms in our houses are essential for healthy living.
  • D
    Cutting nails regularly prevents dirt accumulation and infection in the nails.
Answer
Correct option: B.
Collecting and cleaning of garbage cans on the street regularly helps to prevent the spread of diseases.
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MCQ 1211 Mark
You are aware of polio eradication programme in your city. Children are vaccinated because:
  • A
    Vaccination kills the polio causing microorganisms
  • B
    Prevents the entry of polio causing organism
  • ✓
    It creates immunity in the body
  • D
    All of the above
Answer
Correct option: C.
It creates immunity in the body
The vaccine contains weakened or killed microbe, its toxin or one of its surface proteins. It provides the individual active acquired immunity. For example, if a child is given polio vaccine then that child will be immune to polio disease as it will activate the immune response and lead to the production of antibody and even the memory cells gets prepared against the attack.
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MCQ 1221 Mark
If you live in a overcrowded and poorly ventilated house, it is possible that you may suffer from which of the following diseases
  • A
    Cancer.
  • B
    $\text{AIDS}.$
  • ✓
    Air borne diseases.
  • D
    Cholera.
Answer
Correct option: C.
Air borne diseases.
Living in a enclosed space increases the risk of air $-$ borne diseases.
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MCQ 1231 Mark
Which of the following statements is incorrect$?$
  • A
    Hepatitis is commonly known as jaundice.
  • B
    Bite of female Anopheles mosquito causes malaria.
  • C
    Avoiding the use of used razor and blades can prevent $AIDS.$
  • ✓
    The vaccination given for preventing tuberculosis is $DPT.$
Answer
Correct option: D.
The vaccination given for preventing tuberculosis is $DPT.$

$DPT$ is a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis, and tetanus.

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MCQ 1241 Mark
Most common analgesics used by people for self medication is/ are:
  • A
    Aspirin
  • B
    Lbuprofen
  • C
    Acetaminophen
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
Aspirin is salicylate. It works by reducing the substances in the body that cause pain, fever and inflammation. Ibuprofen is a nonsteroid anti $-$ inflammatory drug, which works by reducing the hormones that cause inflammation and pain in the body. Acetaminophen is a pain reliever and a fever reducer.
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MCQ 1251 Mark
Which of the following is general way of prevention of the infectious diseases?
  • ✓
    Eradication of vectors
  • B
    Propagation of vectors
  • C
    Maintaining unhygienic conditions
  • D
    Allowing water stagnation
Answer
Correct option: A.
Eradication of vectors
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MCQ 1261 Mark
Acne are caused by:
  • A
    $H_1N_1$ virus.
  • B
    Trypamosoma.
  • ✓
    Staphylococcus.
  • D
    Leishmania.
Answer
Correct option: C.
Staphylococcus.
The Staphylococcus genus includes at least $40$ species. Most are harmless and reside normally on the skin and mucous membranes of humans and other organisms. Found worldwide, they are a small component of soil microbial flora.
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MCQ 1271 Mark
Raju was suffering from severe stomach pain and the doctor diagnosed that he was suffering from peptic ulcers and treated him with antibiotics. He was relieved of pain. What could be the reason for peptic ulcers?
  • A
    Reduced secretion of hormones
  • B
    Reduced water content
  • ✓
    Growth of Helicobacter pylori
  • D
    Growth of Haemophilus ducreyi
Answer
Correct option: C.
Growth of Helicobacter pylori
Peptic ulcer disease refers to painful sores or ulcers in the lining of the stomach and the first part of the small intestine called the duodenum. Most ulcers are caused by an infection from bacteria called Helicobacter pylori $($H. pylori$).$
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MCQ 1281 Mark
Ascaris lumbricoides in common roundworm of:
  • A
    Liver.
  • B
    Bile duct.
  • C
    Large intestine.
  • ✓
    Small intestine.
Answer
Correct option: D.
Small intestine.
Ascaris lumbricoides is the "giant roundworm" of humans, growing to a length of up to $35\ cm (14$ in$).$ It is one of several species of Ascaris. An ascarid nematode of the phylum Nematoda, it is the most common parasitic worm in humans. The eggs hatch in the intestines, burrow through the gut wall, and migrate to the lungs via the blood.
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MCQ 1291 Mark
A child who has had an infection of chicken pox or measles, does not suffer from the disease for the second time, because:
  • ✓
    The body has developed immense to fight the infection.
  • B
    The immune system keeps a memory of the specific disease and responds by killing the infectious agent, in the second exposure.
  • C
    The boy is advised to take vitamin tablets daily after the disease.
  • D
    The child is given clean and nutritious food after the disease.
Answer
Correct option: A.
The body has developed immense to fight the infection.
Most people who have had chickenpox won't get it again because they're immune to it for life. However, some people who have had chickenpox will develop a related condition called shingles later on. This is caused by the chickenpox virus being reactivated, usually several decades later.
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MCQ 1301 Mark
Which one of the diseases is not infectious?
  • A
    Typhoid.
  • B
    Leprosy.
  • C
    Measles.
  • ✓
    Leukemia.
Answer
Correct option: D.
Leukemia.
A disease that is not contagious is called a noninfectious disease. These diseases are not caused by pathogens. Instead, they are likely to have causes such as lifestyle factors, environmental toxins, or gene mutations.
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MCQ 1311 Mark
$AIDS$ virus has:
  • A
    Single strand $DNA.$
  • B
    Double strand $DNA.$
  • ✓
    Single strand $RNA.$
  • D
    Double strand $RNA.$
Answer
Correct option: C.
Single strand $RNA.$

Retrovirus is a single-stranded positive-sense $RNA$ virus with a $DNA$ intermediate.

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MCQ 1321 Mark
For effective treatment of a disease:
  • A
    Early diagnosis is required but understanding of its pathophysiology is not required.
  • B
    Early diagnosis is not required but understanding of its pathophysiology is required.
  • ✓
    Early diagnosis and understanding of its pathophysiology are required.
  • D
    Neither early diagnosis nor understanding of its pathophysiology is required.
Answer
Correct option: C.
Early diagnosis and understanding of its pathophysiology are required.

For effective treatment of a disease, early diagnosis and understanding its pathophysiology is very important. Using conventional methods of diagnosis $($serum and urine analysis, etc.$)$ early detection is not possible. Recombinant $DNA$ technology, Polymerase Chain Reaction $(PCR)$ and Enzyme-Linked Immuno-sorbent Assay $(ELISA)$ are some of the techniques that serve the purpose of early diagnosis.

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MCQ 1331 Mark
Which of the following statements is correct about 'Vaccination?'
  • ✓
    Develops resistance against the attack of a disease.
  • B
    Can control every disease.
  • C
    Kills all the disease$-$causing organisms.
  • D
    Involves the use of antibodies.
Answer
Correct option: A.
Develops resistance against the attack of a disease.
Vaccination is a technique to develop immunity in individuals without infection. In vaccination, a preparation of antigenic protein of pathogens or weakened or dead pathogens is injected into a person who is required to be immune. The pathogens, given in a vaccine are unable to cause disease but are sufficient to generate the primary immune response. So, the correct answer is 'Develops resistance against the attack of a disease.'
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MCQ 1341 Mark
In chronic disease a patient suffers from:
  • A
    Poor appetite.
  • B
    Short breath.
  • C
    Tiredness.
  • ✓
    All the above.
Answer
Correct option: D.
All the above.
Depending upon the type of disease, the symptoms can be one or all of them in chronic disease.
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MCQ 1351 Mark
Which of the following affects our health$?$
  • A
    Physical environment
  • B
    Social environment
  • ✓
    Both $A$ and $B$
  • D
    None of these
Answer
Correct option: C.
Both $A$ and $B$

The health of all organisms will depend on their surroundings or their environment. The environment includes the physical environment. So, for example, health is at risk in a cyclone in many ways. Human beings live in societies. Our social environment, therefore, is an important factor in our individual health.

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MCQ 1361 Mark
Which of the following statements is incorrect$?$
  • A
    $AIDS$ can be prevented by taking precautions and avoiding unsafe sexual contact.
  • B
    Prevention is better than cure.
  • ✓
    Treatment is better than prevention.
  • D
    Vaccination provides protection against specific disease.
Answer
Correct option: C.
Treatment is better than prevention.

Prevention is better than treatment because it prevents the discomfort and cost of becoming sick or experiencing a similar type of infection.
It also often takes less effort to prevent something than to treat it.
Sometimes treatment has certain side effects.

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MCQ 1371 Mark
Which one of the following is incorrect about tuberculosis$?$
  • ✓
    It is caused by Salmonella.
  • B
    It commonly affects lungs.
  • C
    Bacteria release tuberculin toxin.
  • D
    Patient's sputum contains blood.
Answer
Correct option: A.
It is caused by Salmonella.
Tuberculosis $(TB)$ is caused by a type of bacterium called Mycobacterium tuberculosis. It's spread when a person with active $TB$ disease in their lungs coughs or sneezes and someone else inhales the expelled droplets, which contain $TB$ bacteria.
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MCQ 1381 Mark
________ disease lasts for short duration of time:
  • ✓
    Acute
  • B
    Chronic
  • C
    Both $A$ and $B$
  • D
    Minor
Answer
Correct option: A.
Acute

An acute disease is a disease that lasts for a short duration of time and with not much long-term effect on the health. For example, cough and cold, typhoid, etc.
A chronic disease lasts for a longer period of time. For example, cancer, diabetes, etc.

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MCQ 1391 Mark
Which of the following can make you ill if you come in contact with an infected person?
  • A
    High blood pressure.
  • B
    Genetic abnormalities.
  • ✓
    Sneezing.
  • D
    Blood cancer.
Answer
Correct option: C.
Sneezing.
Diseases in other options are non$-$infectious diseases. Sneezing is one of the symptoms of common cold and many other respiratory diseases. All these diseases are infectious diseases.
Hence, sneezing can spread infectious diseases from one person to another.
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MCQ 1401 Mark
We should not allow mosquitoes to breed in our surroundings because they:
  • A
    Multiply very fast and cause pollution.
  • ✓
    Are vectors for many diseases.
  • C
    Bite and cause skin diseases.
  • D
    Are not important insects.
Answer
Correct option: B.
Are vectors for many diseases.
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MCQ 1411 Mark
Indirect transmission of disease is _______:
  • A
    Contagious
  • ✓
    Non-contagious
  • C
    Both $A$ and $B$
  • D
    None of these
Answer
Correct option: B.
Non-contagious
Indirect Transmission is the spread of disease from host to host by means of a vector.
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MCQ 1421 Mark
$\text{AIDS}$ cannot be transmitted by:
  • A
    Sexual contact
  • ✓
    Hugs
  • C
    Breast feeding
  • D
    Blood transfusion
Answer
Correct option: B.
Hugs
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MCQ 1431 Mark
A communicable disease is caused by:
  • A
    Metabolic disorder.
  • B
    Allergy.
  • ✓
    Pathogen.
  • D
    Hormonal balance.
Answer
Correct option: C.
Pathogen.
There are many ways a communicable disease can spread. It can spread through exchange of body fluids like blood, tattoos or direct or indirect contact like skin, mouth, nose cough or cold.
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MCQ 1441 Mark
$...........$ disease continues for a few days and causes no longer term effect on body:
  • ✓
    Acute
  • B
    Chronic
  • C
    Infectious
  • D
    Contagious
Answer
Correct option: A.
Acute
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MCQ 1451 Mark
Kala-azar $($black fever$)$ is caused by:
  • ✓
    Protozoan.
  • B
    Fungus.
  • C
    Helminth.
  • D
    Bacterium.
Answer
Correct option: A.
Protozoan.

Visceral leishmaniasis $(VL),$ also known as kala-azar, black fever, and Dumdum fever, is the most severe form of leishmaniasis and, without proper diagnosis and treatment, is associated with high fatality. Leishmaniasis is a disease caused by protozoan parasites of the Leishmania genus.

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MCQ 1461 Mark
How can you protect yourself from infections?
  • A
    Washing hands
  • B
    Keeping surroundings clean
  • C
    Having a proper and healthy diet
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
Keeping the environment clean by avoiding pollution, a healthy diet free from contamination, frequent and thorough hand-washing helps protect you from infectious diseases.
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MCQ 1471 Mark
Being healthy means:
  • A
    Free of infection by pathogen
  • B
    Tension free mental status
  • C
    Living in polluted environment
  • ✓
    Both $A$ and $B$
Answer
Correct option: D.
Both $A$ and $B$

A healthy body indicates both mental, social, and physical well-being. Health depends on three major factors physical, social, and mental.
Free of infection by pathogen sustains physical fitness and a stable mind provides mental fitness.
Living in a polluted environment results in a higher risk of getting infected.

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MCQ 1481 Mark
$SARS$ and Swine flu are caused by:
  • ✓
    Virus.
  • B
    Virus and bacterium.
  • C
    Virus and protozoan.
  • D
    Virus and helminth.
Answer
Correct option: A.
Virus.
Swine flu, also known as the $H_1N_1$ virus, is a relatively new strain of an influenza virus that causes symptoms similar to the regular flu. It originated in pigs, but is spread primarily from person to person. Swine flu made headlines in $2009$ when it was first discovered in humans and became a pandemic.
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MCQ 1491 Mark
The set of diseases which spread through sexual contact as well as through placenta to the foetus are:
  • A
    Malaria and $AIDS$
  • ✓
    $AIDS$ and Syphili
  • C
    Syphilis and Malaria
  • D
    AIDS and Cancer
Answer
Correct option: B.
$AIDS$ and Syphili
$ AIDS$ and Syphili
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MCQ 1501 Mark
Among the options given below, a non$-$infectious disease is:
  • A
    Tuberculosis.
  • ✓
    Cancer.
  • C
    Pneumonia.
  • D
    Cholera.
Answer
Correct option: B.
Cancer.
A healthy person cannot “catch” cancer from someone who has it. There is no evidence that close contact or things like sex, kissing, touching, sharing meals, or breathing the same air can spread cancer from one person to another.
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M.C.Q. [1 M] - Page 3 - Science STD 9 Questions - Vidyadip