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Micro-organisms that grow in milk and convert it to curd are commonly called _________.
Microbes such as Lactobacillus and others commonly called lactic acid bacteria (LAB) grow in milk and convert it into curd.
Hence, the correct option is C.
NCERT Reference: Page no. 181 of topic “10.1 MICROBES IN HOUSEHOLD PRODUCTS” of chapter 10.
Ethanol is commercially produced through a particular species of _________.
Saccharomyces is a yeast that is used to ferment sugar to produce ethanol in absence of oxygen or by anaerobic respiration.
Hence, the correct option is B.
NCERT Reference: Page no. 182 of topic “10.2.1 Fermented Beverages” of chapter 10.
The puffed-up appearance of dough is due to production of?
Hence, the correct option is B.
NCERT Reference: Page no. 181 of topic “10.1 MICROBES IN HOUSEHOLD PRODUCTS” of chapter 10.
Which of the following bacterium produces butyric acid?
Hence, the correct option is A.
NCERT Reference: Page no. 183 of topic “10.2.3 Chemicals, Enzymes and other Bioactive Molecules” of chapter 10.
The most common fungal partners of mycorrhiza are _________ species.
Hence, the correct option is D.
NCERT Reference: Page no. 188 of topic “10.6 MICROBES AS BIOFERTILISERS” of chapter 10.
Hence, the correct option is D.
NCERT Reference: Page no. 182 of topic “10.2.1 Fermented Beverages” of chapter 10.
What do we collectively call the biogas producing bacteria?
Hence, the correct option is D.
NCERT Reference: Page no. 185 of topic “10.4 MICROBES IN PRODUCTION OF BIOGAS” of chapter 10.
On which of the following factors does the type of gas produced depend?
Example: In the fermentation of dough, cheese making and production of beverages, the main gas produced is CO2.
Hence, the correct option is C.
NCERT Reference: Page no. 185 of topic “10.4 MICROBES IN PRODUCTION OF BIOGAS” of chapter 10.
First organic acid produced by microbial fermentation is _________.
Hence, the correct option is C.
NCERT Reference: Page no. 183 of topic “10.2.3 Chemicals, Enzymes and other Bioactive Molecules” of chapter 10.
Vinegar is obtained from molasses with the help of:
Vinegar is chemically diluted acetic acid which is produced by fermentation molasses in presence of Yeast and Acetobacter.
Hence, the correct option is B.
NCERT Reference: Page no. 183 of topic “10.2.3 Chemicals, Enzymes and other Bioactive Molecules” of chapter 10.
Hence, the correct option is B.
NCERT Reference: Page no. 183 of topic “10.3 MICROBES IN SEWAGE TREATMENT” of chapter 10.
Which of the following crops has been developed by genetic engineering in India?
Hence, the correct option is A.
NCERT Reference: Page no. 187 of topic “10.5 MICROBES AS BIOCONTROL AGENTS” of chapter 10.
Which of the following is not correct regarding the primary treatment of wastewater?
Hence, the correct option is A.
NCERT Reference: Page no. 184 of topic “10.3 MICROBES IN SEWAGE TREATMENT” of chapter 10.
Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?
Hence, the correct option is D.
NCERT Reference: Page no. 184 of topic “10.3 MICROBES IN SEWAGE TREATMENT” of chapter 10.
Secondary treatment of sewage is also called _________.
Secondary treatment of sewage is also called biological treatment because in this treatment aeration of sewage water is done that increases the microbes that decompose the organic materials in sewage water.
Hence, the correct option is A.
NCERT Reference: Page no. 184 of topic “10.3 MICROBES IN SEWAGE TREATMENT” of chapter 10.
Hence, the correct option is A.
NCERT Reference: Page no. 184 of topic “10.3 MICROBES IN SEWAGE TREATMENT” of chapter 10.
Which of the following is an aerobic nitrogen-fixing bacterium?
Hence, the correct option is A.
NCERT Reference: Page no. 188 of topic “10.6 MICROBES AS BIOFERTILISERS” of chapter 10.
The common nitrogen-fixer in paddy fields is _________.
Hence, the correct option is D.
NCERT Reference: Page no. 188 of topic “10.6 MICROBES AS BIOFERTILIZERS” of chapter 10.
The most important of the symbiotic nitrogen-fixing bacteria which forms nodules on the roots of legume plants is _________.
Hence, the correct option is D.
NCERT Reference: Page no. 188 of topic “10.6 MICROBES AS BIOFERTILIZERS” of chapter 10.
Which of the following organisms do no fix atmospheric nitrogen?
Hence, the correct option is B.
NCERT Reference: Page no. 188 of topic “10.6 MICROBES AS BIOFERTILIZERS” of chapter 10.
Organisms called Methanogens are most abundant in a _________.
Hence, the correct option is B.
NCERT Reference: Page no. 185 of topic “10.4 MICROBES IN PRODUCTION OF BIOGAS” of chapter 10.
Hence, the correct option is C.
NCERT Reference: Page no. 187 of topic “10.5 MICROBES AS BIOCONTROL AGENTS” of chapter 10.
Assertion: Biofertilizers are organisms that enrich the nutrient quality of the soil.
Reason: Organic farming is the farming technique in which no chemical is used as fertilizers or insecticides.
Both assertion and reason are correct statements but the reason is not the correct explanation of the assertion.
Hence, the correct option is D.
NCERT Reference: Page no. 187 of topic “10.6 MICROBES AS BIOFERTILISERS” of chapter 10.
Bio-fertilizer enriches the nutrient in the soil. The main sources of bio-fertilizers are bacteria, fungi and cyanobacteria.
Hence, the correct option is D.
NCERT Reference: Page no. 187 of topic “10.6 MICROBES AS BIOFERTILISERS” of chapter 10.
In which of the following microbes are not used extensively?
I. Converting milk into curd.
II. Making cheese of different flavour and taste.
III. Production of anti-viral drugs.
IV. Production of antibiotics.
V. As bio-fertilizers.
VI. Production of inorganic fertilizers.
Hence, the correct option is C.
NCERT Reference: Refer topics “10.3 MICROBES IN SEWAGE TREATMENT” and “10.2 MICROBES IN INDUSTRIAL PRODUCTS” of chapter 10.
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