All questions of The immune System for Grade 9 Exam
Who discovered the technique of preparing vaccine from attenuated pathogen and in which year?- a)Edward Jenner, 1796
- b)Louis Pasteur, 1879
- c)Robert Downey, 1856
- d)Von Behring, 1950
Correct answer is option 'B'. Can you explain this answer?
Who discovered the technique of preparing vaccine from attenuated pathogen and in which year?
a)
Edward Jenner, 1796
b)
Louis Pasteur, 1879
c)
Robert Downey, 1856
d)
Von Behring, 1950
|
Raghav Bansal answered |
Louis Pasteur discovered the technique of preparing vaccine from an attenuated pathogen in 1879. This was the first true vaccine consisting of weakened micro-organisms against the disease chicken cholera.
What is the basic principle of immunisation and vaccination?- a)It is based on the number of B and T lymphocytes
- b)It is based on the property of memory of the immune system
- c)It is based on antigen-antibody interactions
- d)It is based upon the number of white blood cells
Correct answer is option 'B'. Can you explain this answer?
What is the basic principle of immunisation and vaccination?
a)
It is based on the number of B and T lymphocytes
b)
It is based on the property of memory of the immune system
c)
It is based on antigen-antibody interactions
d)
It is based upon the number of white blood cells
|
Suresh Iyer answered |
The basic principle of immunisation or vaccination is based on the property of memory of the immune system. When an immunised person is attacked by the pathogen, the existing bodies immediately attack the antigen while the memory T and B cells give rise to a massive crop of lymphocytes and antibodies.
ATS inoculation soon after injury that brings contact with soiled objects give protection against the possible attack of __________- a)Poliomyelitis
- b)AIDS
- c)Tetanus
- d)Influenza
Correct answer is option 'C'. Can you explain this answer?
ATS inoculation soon after injury that brings contact with soiled objects give protection against the possible attack of __________
a)
Poliomyelitis
b)
AIDS
c)
Tetanus
d)
Influenza
|
Gaurav Kumar answered |
ATS inoculation soon after injury that brings contact with soiled objects give protection against the possible attack of tetanus. Wounds and cutes or surgical instruments coming in contact with the road dust may cause the entry of spores into the body. Injection of ATS within 24 hours of injury gives passive immunity to the individual.
Which of the following statements is incorrect regarding Vaccination and Immunisation?- a)Immunisation is the phenomena of increasing specific antibody production
- b)Vaccination is the process of inoculation of harmless antigenic material into the healthy person
- c)A single vaccination gives adequate immunity and lasts lifelong
- d)Immunisation is carried out through vaccination and injection of antiserum
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements is incorrect regarding Vaccination and Immunisation?
a)
Immunisation is the phenomena of increasing specific antibody production
b)
Vaccination is the process of inoculation of harmless antigenic material into the healthy person
c)
A single vaccination gives adequate immunity and lasts lifelong
d)
Immunisation is carried out through vaccination and injection of antiserum
|
Hansa Sharma answered |
A single vaccination gives adequate immunity and lasts lifelong is the incorrect statement. It may not give adequate immunity. Therefore, 2-3 booster doses of vaccine are administered later on at specific intervals.
Jenner prepared the vaccine of smallpox by using _______- a)The attenuated pathogen of smallpox
- b)The killed pathogen of smallpox
- c)The attenuated pathogen of Cowpox
- d)Pathogens from Cowpox pustule
Correct answer is option 'D'. Can you explain this answer?
Jenner prepared the vaccine of smallpox by using _______
a)
The attenuated pathogen of smallpox
b)
The killed pathogen of smallpox
c)
The attenuated pathogen of Cowpox
d)
Pathogens from Cowpox pustule
|
Dev Patel answered |
Edward Jenner prepared his first vaccine of smallpox by using pathogens from cow pustule. He injected fluid from the sore of milkmaid suffering from cowpox into the body of a healthy boy which did not later catch smallpox.
A disease against which vaccination is resorted only during epidemics is ___________- a)Diarrhoea
- b)Tuberculosis
- c)AIDS
- d)Cholera
Correct answer is option 'D'. Can you explain this answer?
A disease against which vaccination is resorted only during epidemics is ___________
a)
Diarrhoea
b)
Tuberculosis
c)
AIDS
d)
Cholera
|
|
Dev Patel answered |
A disease against which vaccination resorts only during epidemics is Cholera. Vaccination against cholera gives immunity for only a few months. It is useful, especially during epidemics. Chlorination or ozone treatment of water, boiled water, disinfected food are measures essential for prevention.
On which of the following discoveries, Von Behring was awarded the noble prize?- a)For discovering passive immunity
- b)For discovering active immunity
- c)For discovering and making the first true vaccine
- d)For discovering methods to protect people from smallpox
Correct answer is option 'A'. Can you explain this answer?
On which of the following discoveries, Von Behring was awarded the noble prize?
a)
For discovering passive immunity
b)
For discovering active immunity
c)
For discovering and making the first true vaccine
d)
For discovering methods to protect people from smallpox
|
Anjali Sharma answered |
Von Behring was awarded the noble prize for his work on passive immunity. He is also regarded as the Father of Passive immunity.
The immunity developed after the body has recovered from a disease is called- a)passive immunity
- b)active immunity
- c)both a and b
- d)none of the above
Correct answer is option 'B'. Can you explain this answer?
The immunity developed after the body has recovered from a disease is called
a)
passive immunity
b)
active immunity
c)
both a and b
d)
none of the above
|
Ujwal Singh answered |
Active Immunity:
Active immunity is the immunity that develops in the body after exposure to a pathogen (bacteria, virus, or any other infectious agent) or after taking a vaccine. It is called active immunity because the body’s immune system actively responds to the pathogen or vaccine by producing antibodies, which are specific proteins that bind to the pathogen and neutralize it.
Mechanism:
- The immune system recognizes the pathogen or vaccine as foreign and activates the B-cells and T-cells.
- B-cells produce specific antibodies that bind to the pathogen and neutralize it.
- T-cells destroy the infected cells that harbor the pathogen.
- Once the infection is cleared, some of the B-cells and T-cells remain in the body as memory cells, which can quickly recognize and respond to the same pathogen if it enters the body again.
Duration:
- Active immunity can last for a long time, sometimes for a lifetime, depending on the type of pathogen or vaccine.
Examples:
- Active immunity is developed after recovery from infections like chickenpox, measles, mumps, and rubella.
- It is also developed after vaccination against infectious diseases like polio, hepatitis B, influenza, and human papillomavirus (HPV).
Advantages:
- Active immunity is a natural and long-lasting immunity that protects the body against a wide range of infectious agents.
- It is also cost-effective, as it does not require frequent administration of vaccines or drugs.
Disadvantages:
- Active immunity takes time to develop, sometimes weeks or months, which can be fatal in some cases.
- It may not be effective against new strains or mutations of the pathogen.
Conclusion:
Active immunity is the most effective and natural way of developing immunity against infectious agents. It protects the body against a wide range of pathogens and can last for a lifetime. Vaccination is a safe and effective way of developing active immunity without the risk of contracting the disease.
Active immunity is the immunity that develops in the body after exposure to a pathogen (bacteria, virus, or any other infectious agent) or after taking a vaccine. It is called active immunity because the body’s immune system actively responds to the pathogen or vaccine by producing antibodies, which are specific proteins that bind to the pathogen and neutralize it.
Mechanism:
- The immune system recognizes the pathogen or vaccine as foreign and activates the B-cells and T-cells.
- B-cells produce specific antibodies that bind to the pathogen and neutralize it.
- T-cells destroy the infected cells that harbor the pathogen.
- Once the infection is cleared, some of the B-cells and T-cells remain in the body as memory cells, which can quickly recognize and respond to the same pathogen if it enters the body again.
Duration:
- Active immunity can last for a long time, sometimes for a lifetime, depending on the type of pathogen or vaccine.
Examples:
- Active immunity is developed after recovery from infections like chickenpox, measles, mumps, and rubella.
- It is also developed after vaccination against infectious diseases like polio, hepatitis B, influenza, and human papillomavirus (HPV).
Advantages:
- Active immunity is a natural and long-lasting immunity that protects the body against a wide range of infectious agents.
- It is also cost-effective, as it does not require frequent administration of vaccines or drugs.
Disadvantages:
- Active immunity takes time to develop, sometimes weeks or months, which can be fatal in some cases.
- It may not be effective against new strains or mutations of the pathogen.
Conclusion:
Active immunity is the most effective and natural way of developing immunity against infectious agents. It protects the body against a wide range of pathogens and can last for a lifetime. Vaccination is a safe and effective way of developing active immunity without the risk of contracting the disease.
Why are the vaccines produced through genetic engineering considered as safe?- a)They have only the coat of pathogen
- b)They are attenuated form of a pathogen
- c)They have killed form of pathogens
- d)They have all the genes of pathogens
Correct answer is option 'A'. Can you explain this answer?
Why are the vaccines produced through genetic engineering considered as safe?
a)
They have only the coat of pathogen
b)
They are attenuated form of a pathogen
c)
They have killed form of pathogens
d)
They have all the genes of pathogens
|
Preeti Iyer answered |
The vaccines produced through genetic engineering are considered safe because they contain antigen only from the coat of pathogen which is almost harmless.
Chapter doubts & questions for The immune System - Biology 2025 is part of Grade 9 exam preparation. The chapters have been prepared according to the Grade 9 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Grade 9 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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