Biology and Human Welfare
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See all →- Which of the following type of immunity is present at the time of birth and is a non-specific type of defence in the human body? Answer: 2. Innate Immunity Key idea: Innate immunity is present from birth and is non-specific. Acquired immunity is pathogen-specific and d... 1
- Neoplastic characteristics of cells refer to :A. A mass of proliferating cellB. Rapid growth of cellsC. Invasion and damage to the surrounding tissueD. Those confined to original locationChoose the correct answer from the options given below: Answer: 2. A, B, C only Key idea: Neoplastic cells proliferate as a mass, grow rapidly and invade neighbouring tissue. A, B and C are correc... 1
- Identify the statement that is NOT correct. Answer: 3. Antigen binding site is located at C-terminal region of antibody molecules. Key idea: An antibody is Y-shaped, made of 2 heavy an... 1
- After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens to secondary lymphoid organ(s) / tissue(s) like:A. thymus B. bone marrow C. spleen D. lymph nodes E. Peyer's patchesChoose the correct answer from the… Answer: 4. C, D, E only Key idea: Primary lymphoid organs are thymus and bone marrow, where lymphocytes mature. Secondary lymphoid organs ar... 1
- Which are correct:A. Computed tomography and magnetic resonance imaging detect cancers of internal organs.B. Chemotherapeutics drugs are used to kill non-cancerous cells.C. α-interferon activate the cancer patients' immune system and helps in destroy… Answer: 4. A and C only A: correct. CT and MRI detect cancers of internal organs. B: wrong. Chemotherapeutic drugs kill cancer cells, though... 1
- Given below are two statements :Statement I : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.Statement II : Both bone marrow and thymus provide micro environments for the development and maturation of… Answer: 2. Both Statement I and Statement II are correct. Key idea: primary lymphoid organs are bone marrow and thymus. Statement I is corre... 1