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Microbes Household Products Industrial Products And Sewage Treatment Free Doubts and Solutions

CBSE - XII Science - Biology - Microbes in Human Welfare

Define BOD. How does BOD determine the pollution of water ?

Asked by pksunilnair 3rd October 2017, 3:42 PM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Explain the process of curd formation from milk.               (i) Complete the flowchart. (ii) Expand the word LAB. (iii) Explain the role of LAB in human body.

Asked by Topperlearning User 24th June 2014, 4:06 PM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Explain the different steps involved in sewage treatment before it can be released into natural water bodies.

Asked by Topperlearning User 24th June 2014, 4:01 PM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Which bacterium is involved in the production of Swiss cheese? What is its role?

Asked by Topperlearning User 24th June 2014, 3:59 PM
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CBSE - XII Science - Biology - Microbes in Human Welfare

(a) How is activated sludge produced during sewage treatment? (b) Explain how this sludge is used in biogas production.

Asked by Topperlearning User 24th June 2014, 3:56 PM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Milk begins to coagulate when lactic acid bacteria (LAB) are added to warm milk as a starter. Mention any other two benefits that LAB provide.

Asked by Topperlearning User 24th June 2014, 3:51 PM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Name any three enzymes used in industry and state their significance.

Asked by Topperlearning User 11th June 2014, 9:53 AM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Explain in brief about the Yamuna Action Plan.

Asked by Topperlearning User 11th June 2014, 9:53 AM
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CBSE - XII Science - Biology - Microbes in Human Welfare

State any three properties of antibiotics.

Asked by Topperlearning User 11th June 2014, 9:53 AM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Fill in the blank spaces a, b, c and d in the table given below:   Type of microbe Name Commercial product Fungus a Penicillin Bacterium Acetobacter aceti b c Aspergillus niger Citric acid Yeast d Ethanol    

Asked by Topperlearning User 11th June 2014, 9:53 AM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Name the enzyme produced by Streptococcus bacterium. Explain its importance in medical sciences.

Asked by Topperlearning User 11th June 2014, 9:53 AM
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CBSE - XII Science - Biology - Microbes in Human Welfare

Name a microbe used for statin production. How do statins lower blood cholesterol level?

Asked by Topperlearning User 11th June 2014, 9:53 AM
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