Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The primary treatment of sewage involves:
Primary treatment basically involve physical removal of particles – large and small – from the sewage through filtration and sedimentation. Firstly, floating debris is removed by sequential filtration. Then the grit (soil and small pebbles) are removed by sedimentation.
Biogas contains:
During anaerobic digestion, bacteria produce a mixture of gases such as Methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as they are flammable.
The symbiotic association between fungi and roots of higher plants is called:
Fungi form symbiotic associations with plants, called as mycorrhiza. The fungal symbiont in these associations absorbs phosphorus from soil and passes it to the plant. Plants having such associations show other benefits also, such as resistance to root-borne pathogens, tolerance to salinity and drought, and an overall increase in plant growth and development.
In cheese manufacture, the micro-organisms are used for:
The bacteria feed on the sugars in the milk. The main sugar in milk is called lactose. Lactose is converted into lactic acid by bacterial fermentation, the increased acidity sours and thickens the milk. Ripening is the final and crucial step of cheese making which majorly affects the flavor of cheese. It includes several physical, chemical and microbiological changes using microbes and enzymes- rennet, lipases, moulds and yeasts.
Organic farming includes:
Organic farming is agricultural production system which excludes the use of synthetically compounded fertilizers and pesticides. It favours using biologically originated fertilisers and pesticides.
Which one of the following is not a biofertilizer?
Agrobacterium is used in a transformation method and is not a biofertilizer.
Ethanol is commercially produced through a particular species of:
Saccharomyces cerevisiae is used for fermenting malted cereals and fruit juices, to produce ethanol commercially.
A patient brought to a hospital with myocardial infarction is normally immediately given:
Streptokinase produced by the bacterium Streptococcus and modified by genetic engineering is used as a ‘clot buster’ for removing clots from the blood vessels of patients who have undergone myocardial infarction leading to heart attack.
Lactic Acid Bacteria grow in
NCERT page number 181
10.1 Microbes In Household Products
Microbes In Human Welfare
The digestion of milk proteins is carried out by
NCERT page number 181
10.1 Microbes In Household Products
Microbes In Human Welfare
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