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Biology
Human Health and Disease
121 questions from 38 papers, each with its answer.
- 121 questions
- 38 papers
- 3.43% of Biology
Cancer Detection and Treatment
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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. $\alpha$-interferon activate the cancer patients' immune system and helps in destroying the tumour.
D. Chemotherapeutic drugs are biological response modifiers.
E. In the case of leukaemia blood cells counts are decreased.
Choose the correct answer from the option given below:Statements A and C are correct.
CT and MRI scans are standard techniques for detecting internal neoplasms (A). Biological response modifiers like $\alpha$-interferon stimulate host immune defense against cancer (C). Chemotherapy selectively targets rapidly dividing neoplastic cells, not non-cancerous cells (B is false), interferon is the biological response modifier (D is false), and leukaemia features abnormal overproduction of leukocytes (E is false).
Cancer Biology
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Neoplastic characteristics of cells refers to:
A. A mass of proliferating cell
B. Rapid growth of cells
C. Those confined to original location
D. Invasion and damage to the surrounding tissue
Choose the correct answer from the options given below:Neoplastic/malignant cells proliferate rapidly (A, B) and invade adjoining tissues (D). Remaining confined to original location is characteristic of benign lesions.
Malignant tumors contain neoplastic cells displaying uncontrolled mass proliferation (A), rapid cell division (B), and active invasion with destruction of surrounding healthy tissues (D). Staying confined to the primary site (C) is a hallmark of non-invasive benign tumors.
Structure of Antibody
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Identify the statement that is NOT correct.
Antigen binding sites (paratope) are located at the variable N-terminal region of heavy and light chains.
Each antibody has an $H_2L_2$ configuration bound by interchain disulfide bridges. The antigen-binding sites reside at the amino-terminal (N-terminal) variable domain of Fab fragments, not at the C-terminus. The carboxy-terminal (C-terminal) corresponds to constant domains (Fc).
Lymphoid Organs
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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 patches
Choose the correct answer from the options given below:Spleen, lymph nodes, and Peyer's patches are secondary lymphoid organs.
Primary lymphoid organs are bone marrow and thymus where immature lymphocytes differentiate. Mature lymphocytes migrate to secondary lymphoid organs/tissues (spleen, lymph nodes, tonsils, Peyer's patches of small intestine, appendix) to interact with antigens.
Innate vs Acquired Immunity
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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?
Innate immunity is present at birth and non-specific.
Innate immunity is non-specific defense present from birth, consisting of physical, physiological, cellular, and cytokine barriers. Acquired immunity (including humoral and cell-mediated) develops pathogen-specifically post-exposure.
That is every question in Human Health and Disease for this filter.
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