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Bihar Board Class 12 (Science) Biology in Human Welfare & Health — practice questions — page 2

Explore 90 free Biology in Human Welfare & Health questions in Bihar Board Class 12 (Science) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biology in Human Welfare & Health questions and exercises with answers

Showing questions 31–60 of 90.

The first antibiotic to be discovered was:Read the answer and worked solution →Municipal waste water is also called:Read the answer and worked solution →The gas produced by microbes from dung and used as fuel is:Read the answer and worked solution →Lactic acid bacteria coagulate milk protein by producing:Read the answer and worked solution →Penicillin was named after which mould?Read the answer and worked solution →Cyclosporin A is obtained from which organism?Read the answer and worked solution →BOD stands for biochemical oxygen:Read the answer and worked solution →Sewage is treated until its BOD is:Read the answer and worked solution →Bacteria that produce methane in a biogas plant are called:Read the answer and worked solution →A common methane producing bacterium is:Read the answer and worked solution →Biogas made from cattle dung is commonly called:Read the answer and worked solution →The fungus developed as a biological control for plant disease is:Read the answer and worked solution →Baculoviruses are used as biological control agents against:Read the answer and worked solution →Root nodules of legumes are formed by symbiosis with:Read the answer and worked solution →Cyanobacteria such as Anabaena serve as biofertilisers in:Read the answer and worked solution →Antibodies passed from a mother to her infant through breast milk give the infantRead the answer and worked solution →The yeast used in baking and brewing is:Read the answer and worked solution →Biogas made from cattle dung is commonly called:Read the answer and worked solution →The spread of cancer cells from the original site to distant organs is calledRead the answer and worked solution →Order the reasoning: why vector control worksRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →HPV (Human Papillomavirus) is a known cause of:Read the answer and worked solution →Innate immunity is best described as:Read the answer and worked solution →The MOST ABUNDANT antibody class in human blood is:Read the answer and worked solution →Typhoid fever is caused by:Read the answer and worked solution →True or false: what health meansRead the answer and worked solution →Tap every public health measure the chapter namesRead the answer and worked solution →Cyclosporin A is obtained from which organism?Read the answer and worked solution →Vector-borne diseaseRead the answer and worked solution →

Worked practice questions

The first antibiotic to be discovered was:

  1. Streptomy
  2. Tetracycl
  3. Erythromy
  4. Penicillin
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Correct answer: D. Penicillin

1. Its discovery was famously a matter of chance. 2. It came from a mould growing on a culture plate. 3. That antibiotic was Penicillin. 4. So the answer is Penicillin. _Source: syllabus Biology, Ch 8 'Microbes in Human Welfare'_

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Municipal waste water is also called:

  1. Stream
  2. Sewage
  3. Slurry
  4. Sludge
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Correct answer: B. Sewage

1. Cities produce large volumes of used water. 2. It carries a great deal of organic matter. 3. This waste water is called sewage. 4. So the answer is sewage. _Source: syllabus Biology, Ch 8 'Microbes in Human Welfare'_

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The gas produced by microbes from dung and used as fuel is:

  1. Argon
  2. Radon
  3. Biogas
  4. Ozone
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Correct answer: C. Biogas

1. The mixture is inflammable and can be burnt. 2. It is generated in a tank from cattle dung. 3. That gas is biogas. 4. So the answer is biogas. _Source: syllabus Biology, Ch 8 'Microbes in Human Welfare'_

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