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CUET UG Biology in Human Welfare & Health — practice questions

Explore 36 free Biology in Human Welfare & Health questions in CUET UG 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 1–30 of 36.

Milk is converted into curd by which micro-organism?Read the answer and worked solution →The puffed up appearance of dough is caused by:Read the answer and worked solution →The yeast used in baking and brewing is:Read the answer and worked solution →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 →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 →Cyclosporin A is obtained from which organism?Read the answer and worked solution →Bacteria that produce methane in a biogas plant are called:Read the answer and worked solution →Baculoviruses are used as biological control agents against:Read the answer and worked solution →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 →BOD stands for biochemical oxygen:Read the answer and worked solution →A common methane producing bacterium is:Read the answer and worked solution →Root nodules of legumes are formed by symbiosis with:Read the answer and worked solution →

Worked practice questions

Milk is converted into curd by which micro-organism?

  1. Lactobacillus
  2. Penicillium
  3. Baculovirus
  4. Methanogen
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Correct answer: A. Lactobacillus

1. A starter of old curd is added to warm milk. 2. The bacteria in it multiply and act on the milk. 3. Lactobacillus and other such bacteria make the curd. 4. So the answer is Lactobacillus. _Source: syllabus Biology, Ch 8 'Microbes in Human Welfare'_

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The puffed up appearance of dough is caused by:

  1. Hydrogen gases
  2. Carbon dioxide
  3. Oxygen bubbles
  4. Nitrogen gases
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Correct answer: B. Carbon dioxide

1. Dough for dosa and idli is fermented by microbes. 2. Fermentation releases a gas that is trapped inside. 3. That gas is carbon dioxide. 4. So the answer is carbon dioxide. _Source: syllabus Biology, Ch 8 'Microbes in Human Welfare'_

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The yeast used in baking and brewing is:

  1. Propionibacter
  2. Streptococcus
  3. Saccharomyces
  4. Lactobacillus
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Correct answer: C. Saccharomyces

1. Bread and traditional drinks use the same organism. 2. It is a fungus, not a bacterium. 3. It is Saccharomyces cerevisiae. 4. So the answer is Saccharomyces. _Source: syllabus Biology, Ch 8 'Microbes in Human Welfare'_

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