Biology questions
20584 published questions with worked solutions.
- Measures for personal hygiene include (1) Intake of clean drinking water. (2) Keeping the body clean. (3) Disinfection of water...
- HIV causes a complete breakdown of immune system by
- Recognition and digestion by the phagocytes due to the coated surface of antigens by the antibodies, is known as
- What is the major benefit of the specific defense system?
- Consider the following statements. (1) The property of metastasis is shown by malignant tumors. (2) Carcinogens are the agents...
- Vaccines are required for ______ diseases.
- Select the true statement. (1) AIDS has no cure, prevention is the best option. (2) During HIV infection, the person suffers from...
- A portion of the antigen, the antigenic determinant, which can bind the antigen binding site (paratope) of the antibody is
- Malignant tumors are (1) Mass of neoplastic cells. (2) Cells that grow very rapidly and damaging the surrounding normal tissue...
- Normal cell have genes called __A__ which are present in inactivated state but under certain conditions like __B__ they get...
- Which of the following immune response is more potent and long lived?
- Hypersensitivity to an allergen is due to
- The humoral immune system defends mostly against bacteria and viruses in the
- Which of the following diseases is common among individuals with deficient immune systems?
- A flexible region in antibody is
- Helper T-cells stimulate B-cells to mature and increase their
- The drug cyclosporine used for organ transplant patients is obtained from a
- HIV is a __A__, which means it has genes composed of __B__ like all viruses, HIV replicates inside the host cells. It's...
- The cells which directly attack and destroy the antigens are known as
- Consider the following statements about AIDS. (1) AIDS patient become easily infected by bacteria, viruses and even parasites....