Practice free Microbes and Human Welfare (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
'Toddy', a traditional drink from southern India, is made by fermenting which raw material?
The text mentions, '‘Toddy’, a traditional drink of some parts of southern India is made by fermenting sap from palms.'
Industrial production of beverages requires growing microbes in large vessels. What are these vessels called?
The text states, 'Production on an industrial scale, requires growing microbes in very large vessels called fermentors (Figure 8.4).'
Which of the following beverages is produced by the distillation of fermented broth?
The text clarifies, 'Wine and beer are produced without distillation whereas whisky, brandy and rum are produced by distillation of the fermented broth.' Toddy is fermented palm sap, not typically distilled for consumption in its traditional form.
Besides 'brewer's yeast', Saccharomyces cerevisiae is also known for its role in preparing which household product?
The text states, 'the same yeast Saccharomyces cerevisiae used for bread-making and commonly called brewer’s yeast, is used for fermenting malted cereals and fruit juices'. Thus, it's also used for bread.
Which one of the following statements is NOT correct?
Algal blooms DETERIORATE water quality (block sunlight, deplete O₂); option B is wrong.
Match List I with List II.
| List I | List II |
|---|---|
| A. Clostridium butylicum | I. Ethanol |
| B. Saccharomyces cerevisiae | II. Streptokinase |
| C. Trichoderma polysporum | III. Butyric acid |
| D. Streptococcus sp. | IV. Cyclosporin-A |
Choose the correct answer from the options given below:
Clostridium → butyric acid; Saccharomyces → ethanol; Trichoderma → cyclosporin-A; Streptococcus → streptokinase.
Given below are two statements:
Statement I: Bt toxins are insect group specific and coded by a gene cry IAc.
Statement II: Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets converted to active form due to acidic pH of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:
Protoxin activation occurs in the alkaline pH of the insect midgut, not acidic — Statement II is false.
Which of the following is an example of non-distilled alcoholic beverage produced by yeast?
Wine and beer are produced without distillation; whisky, brandy and rum are distilled beverages.
Streptokinase produced by the bacterium Streptococcus is used for:
Streptokinase is a "clot buster" used to dissolve blood clots in patients with myocardial infarction.
Which of the following organisms cannot fix nitrogen? A. Azotobacter, B. Oscillatoria, C. Anabaena, D. Volvox, E. Nostoc. Choose the correct answer:
Volvox is a colonial green alga and cannot fix nitrogen. Azotobacter, Oscillatoria, Anabaena and Nostoc are nitrogen-fixers.
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