Standard Books Botany Microbes in Human Welfare Class 12 Questions
38 questions
The dough kept overnight in warm weather becomes soft and spongy because of
One of the oldest food items in which microbes were used is _______
_______ are used in detergent formulations and are helpful in removing oily stains from the laundry
Large holes in Swiss cheese are due to the bacterium
The bottled juices are clarified by the use of & ________
Curdling of milk takes place by
Vitamin B₁₂ is a good source of both curd and yogurt by conversion of milk to curd it increases its nutrient value by increasing the amount of B₁₂.
Match the following organisms with the products they produce
A. Lactobacillus
B. Saccharomyces
C. Aspergillus niger
D. Acetobacter aceti
- Cheese
- Curd
- Citric Acid
- Bread
- Acetic Acid Select the correct option from the following
A compound which is produced by an organism and inhibits the growth of other organism is called
_______ is used as an immunosuppressive agent in organ transplants, is produced by the fungus _______
Sir Alexander Fleming extracted penicillin from
Match the microbes in column I with their commercial/industrial products in column II and choose the correct answer
The organism used for alcohol fermentation is
Members of the fungal genus ______ form symbiotic associations with plants called ______
Which one of the following is used in the baking of the bread
Which bacteria are present in gut of cow
Which among these are produced by the distillation of fermented broth (i) Whisky (ii) Beer (iii) Wine (iv) Brandy (v) Rum
Yeast is used in the production of
Ernst chain and Howard Florey's contribution was
Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct
Which of the following is wrongly matched in the given table
In the sewage treatment, bacterial flocs are allowed to sediment in a settling tank. This sediment is called as
The primary treatment of sewage involves
Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes
During sewage treatment, biogases are produced which include
'Flocs' refer to
One of the following bacterial groups are exploited in biogas production
In gobar gas, the maximum amount is that of
Which of the followings is mainly produced by the activity of anaerobic bacteria on sewage
Methanogenic bacteria are not found in
Select the correct statement from the following
Some blue green algae can be used as biofertilizer as they are
The common nitrogen-fixer in paddy fields is
Azolla enriches rice fields with nitrogen due to its association with
Biofertilizers include
The technology of biogas production was developed in India mainly due to the efforts of ______ & ______
Which one of the following is an example of carrying out biological control of pests/diseases using microbes
Match the items in Column 'A' and Column 'B' and choose correct answer