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Human Health and Disease MCQs
Class XII Biology
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NCERT Based
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NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
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446 questions in this chapter
Question 41 of 446
📘 CLASS XII
An antibody molecule is represented as H₂L₂ because it consists of:
An antibody molecule has two small light chains and two longer heavy chains, represented as H₂L₂.
Question 42 of 446
📘 CLASS XII
Which of the following is NOT listed as a type of antibody produced in the human body?
IgA, IgM, IgE, IgG are some of the types mentioned.
Question 43 of 446
📘 CLASS XII
The immune response characterized by antibodies found in the blood is called:
Because antibodies are found in the blood, the response is called humoral immune response.
Question 44 of 446
📘 CLASS XII
Which type of immune response is mediated by T-lymphocytes and is responsible for graft rejection during organ transplantation?
The T-lymphocytes mediate CMI, and this response is responsible for graft rejection.
Question 45 of 446
📘 CLASS XII
When a host is exposed to antigens (living or dead microbes) and produces antibodies itself, this is called:
When a host is exposed to antigens, and antibodies are produced in the host body, this is called active immunity.
Question 46 of 446
📘 CLASS XII
When ready-made antibodies are directly given to protect the body against foreign agents, it is called:
When ready-made antibodies are directly given to protect the body against foreign agents, it is called passive immunity.
Question 47 of 446
📘 CLASS XII
Which antibody is abundant in colostrum (mother's milk) and provides passive immunity to the newborn infant?
The yellowish fluid colostrum has abundant antibodies (IgA) to protect the infant, which is passive immunity.
Question 48 of 446
📘 CLASS XII
A preparation of antigenic proteins of a pathogen or inactivated/weakened pathogen introduced into the body is called a:
In vaccination, a preparation of antigenic proteins of pathogen or inactivated/weakened pathogen (vaccine) are introduced into the body.
Question 49 of 446
📘 CLASS XII
If a person is infected with deadly microbes requiring a quick immune response, such as in tetanus or snakebites, the injection provided contains:
We need to directly inject the preformed antibodies, or antitoxin, which is passive immunisation.
Question 50 of 446
📘 CLASS XII
The Hepatitis B vaccine is produced using which advanced biological technique?
Recombinant DNA technology has allowed the production of vaccines like hepatitis B vaccine produced from yeast.
