Biology And Human Welfare Questions

31 Practice QuestionsStart Practicing Now

[Hard]A wheat variety developed through plant breeding to combat protein malnutrition by improving grain protein quality is best represented by which exampl...
[Medium]When isolated protoplasts of two different plant varieties are fused to create a hybrid such as the pomato, the process is called what?...
[Medium]The capacity of a single plant cell to regenerate into a complete plant, exploited during micropropagation in tissue culture, is termed what?...
[Hard]Microbes grown on a large scale as an alternative protein-rich source of food for animals and humans are collectively referred to as what?...
[Easy]In paddy fields, which free-living photosynthetic cyanobacterium serves as an important biofertilizer by fixing atmospheric nitrogen and enriching soi...
[Medium]A bacterium widely used as a biological insecticide produces protein crystals that specifically kill certain insect larvae, which microorganism is thi...
[Medium]Which controlled breeding technique allows a superior cow to yield several calves yearly by transferring multiple fertilised embryos into surrogate mo...
[Easy]For large-scale commercial production of honey and beeswax through apiculture, which species of honeybee is most commonly reared throughout the world?...
[Easy]The combustible gas produced in a biogas plant from cattle dung is generated mainly through the metabolic activity of which group of microbes?...
[Medium]The first antibiotic, discovered by Alexander Fleming as a chemical that inhibited the growth of Staphylococci, was produced by which organism?...
[Easy]The bacteria responsible for converting milk into curd also improve its nutritional value by increasing the content of which vitamin?...
[Medium]Among four sewage water samples whose biochemical oxygen demand is measured, which BOD value in mg per litre indicates the most heavily polluted water...
[Easy]Cocaine, a potent stimulant that interferes with dopamine transport in the central nervous system, is obtained from which plant source?...
[Medium]Heroin, a highly addictive depressant, is prepared by acetylation of morphine extracted from the latex of which flowering plant?...
[Hard]Normal cells stop dividing once they touch neighbouring cells, but cancer cells continue multiplying because they have lost which regulatory property?...
[Medium]When ready-made antibodies are directly introduced into a person to provide immediate protection against a toxin, what type of immunity is conferred?...
[Medium]During a second exposure to the same antigen, which immunoglobulin is produced most rapidly and in the highest amount in the secondary immune response...
[Medium]The human immunodeficiency virus causing AIDS stores its genetic information as RNA, which enzyme enables it to integrate its genome into host DNA?...
[Easy]A patient diagnosed positive by the Widal test shows persistent high fever with intestinal infection, which bacterium is the causative agent?...
[Easy]Which protozoan parasite transmitted by the female Anopheles mosquito is responsible for the most lethal form of malignant malaria in humans?...
[Easy]Which type of vaccine contains weakened pathogens?...
[Medium]Nicotine primarily stimulates release of which neurotransmitter contributing to addiction?...
[Easy]Curd formation primarily involves which bacterium?...
[Easy]Anopheles mosquito transmits which disease?...
[Medium]ORAL rehydration solution (ORS) combats dehydration by providing:...
[Hard]Herd immunity helps protect individuals who:...
[Medium]Biogas production uses methanogens acting on:...
[Medium]An infection doubles its case count every 3 days. Starting with 400 cases, how many after 9 days assuming ideal doubling?...
[Easy]Mycobacterium tuberculosis primarily infects which organ system?...
[Hard]Oncogenes arise most commonly via mutation of which normal genes?...
[Medium]Golden rice is engineered to provide increased levels of which nutrient precursor?...