Human Health and Diseases — Important Questions
Maharashtra Board · Class 12 · Biology
45 important questions from Human Health and Diseases for Maharashtra Board Class 12 Biology, with answers. Written for the board exams 2027.
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Important Questions from Human Health and Diseases
Which components are present in the structure of an antibody?
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Heavy chains, Light chains, Variable regions, Constant regions
An antibody has a Y-shaped structure with two heavy chains and two light chains. Each chain has variable and constant regions. Variable regions form the antigen-binding sites.
Blood group AB is called universal acceptor because:
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It has no antibodies in plasma
AB blood group individuals have both A and B antigens on RBCs but no antibodies (anti-a or anti-b) in plasma, so they can receive blood from any ABO group.
Which pathogen causes typhoid?
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Salmonella typhi
Typhoid is caused by Salmonella typhi, a Gram-negative bacteria. It causes acute infection of the intestine with prolonged fever.
Which cells produce antibodies?
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Plasma cells
Plasma cells are formed from activated B-lymphocytes and produce antibodies at an extremely rapid rate of about 2000 molecules per second.
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