NCERT Solutions for Class 12 Biology Chapter 8 Human Health and Disease in Hindi Mediem
FAQs on NCERT Solutions for Class 12 Biology Chapter 8 - In Hindi
1. What does ‘a suitable gene’ mean, in the context of DNA vaccines?
A suitable gene is the specific DNA used in DNA vaccines, which have segments of specific DNA that are injected inside the host body. This specific DNA segment produces a protein in the body of the host. This protein in turn kills the organisms that can have the capability of causing specific diseases to the host body. By killing the disease-causing microorganisms, the host body produces immunity to the specific microorganisms.
2. Name the primary and secondary lymphoid organs?
Primary Lymphoid Organs of the human body includes:
The bone marrow
The thymus
Whereas, Secondary Lymphoid Organs of the human body include:
The spleen
Lymph nodes
Tonsils
Peyer’s patches of the small intestine
The appendix.
3. Give the full form of the following of
MALT
CMI
AIDS
NACO
HIV
The full forms of the following are:
MALT- Mucosa-Associated Lymphoid Tissue
CMI- Cell-Mediated Immunity
AIDS- Acquired Immunodeficiency Syndrome
NACO- National AIDS Control Organization
HIV- Human ImmunoDeficiency virus.
4. Differentiate between Innate and Acquired Immunity?
Innate Immunity is inherited by the parents. It protects the host body from disease-causing microorganisms. It is a non-pathogenic specific type of defence mechanism. It also does not have a specific memory.
Acquired immunity is produced by primary and secondary lymphoid organs. It is a pathogenic specific type of defence mechanism. It has a specific memory towards disease.
5. What is the reason behind suffering from AIDS? How are they developed in human beings?
AIDS or Acquired Immunodeficiency Syndrome is caused in human beings due to HIV (Human Immunodeficiency Virus). It is transmitted in the following ways:
Unprotected intercourse with the infected person.
Sharing of infected syringes and needles.
Mixing up the blood from an infected person with a healthy person.
Transfer of virus from the placenta of an infected mother to her child.