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NEET UG Microbes in Human Welfare — practice questions

Explore 44 free Microbes in Human Welfare questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Microbes in Human Welfare questions and exercises with answers

Showing questions 1–30 of 44.

Milk is turned into curd by bacteria called:Read the answer and worked solution →Lactic acid bacteria set milk by producing:Read the answer and worked solution →A small amount of curd added to fresh milk acts as a:Read the answer and worked solution →Curd improves nutrition by increasing a vitamin of the group:Read the answer and worked solution →The puffed up look of dosa and idli dough comes from:Read the answer and worked solution →Bread dough is fermented using baker's:Read the answer and worked solution →Toddy is a traditional drink made by fermenting sap from:Read the answer and worked solution →Swiss cheese gets its large holes from which gas:Read the answer and worked solution →Roquefort cheese is ripened by growing on it a specific:Read the answer and worked solution →Penicillin was discovered by chance by:Read the answer and worked solution →Penicillin takes its name from the mould:Read the answer and worked solution →Penicillin's full potential was established by Howard Florey and:Read the answer and worked solution →Penicillin was used extensively to treat soldiers wounded in:Read the answer and worked solution →Fleming, Chain and Florey received the Nobel Prize in:Read the answer and worked solution →Sewage treatment begins with a stage that removes particles by:Read the answer and worked solution →Solids settling out in primary treatment form the primary:Read the answer and worked solution →In secondary treatment the effluent goes into large tanks that are:Read the answer and worked solution →Masses of bacteria with fungal filaments in aeration tanks are called:Read the answer and worked solution →The sediment settling after secondary treatment is called activated:Read the answer and worked solution →The remaining sludge is digested in tanks that are:Read the answer and worked solution →Biogas produced from dung is commonly called:Read the answer and worked solution →Bacteria producing biogas are known as:Read the answer and worked solution →True or false on useful microbesRead the answer and worked solution →Quick picks on useful microbesRead the answer and worked solution →Match each product to its microbeRead the answer and worked solution →Primary or secondary treatmentRead the answer and worked solution →Food or medicineRead the answer and worked solution →Treat the sewageRead the answer and worked solution →Fill the gaps on useful microbesRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →

Worked practice questions

Milk is turned into curd by bacteria called:

  1. Lactic acid
  2. Nitric acid
  3. Acetic acid
  4. Formic acid
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Correct answer: A. Lactic acid

1. Lactobacillus and its relatives grow readily in milk. 2. They are grouped under one common name. 3. They are the lactic acid bacteria. _Source: syllabus Biology, Chapter 10, Microbes in Human Welfare._

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Lactic acid bacteria set milk by producing:

  1. Gases
  2. Acids
  3. Bases
  4. Salts
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Correct answer: B. Acids

1. The bacteria grow on the sugars of the milk. 2. What they release changes the milk proteins. 3. They produce acids that coagulate those proteins. _Source: syllabus Biology, Chapter 10, Microbes in Human Welfare._

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A small amount of curd added to fresh milk acts as a:

  1. Starter
  2. Filter
  3. Coolant
  4. Sweetener
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Correct answer: A. Starter

1. The added curd already holds millions of bacteria. 2. Those bacteria multiply in the fresh milk. 3. So the curd acts as an inoculum, or starter. _Source: syllabus Biology, Chapter 10, Microbes in Human Welfare._

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