Microbes in human welfare practice · Medium

Organic farming includes
I. use of biofertilisers and biopesticides
II. crop rotation
III. locally developed pest resistant varieties
Choose the correct option

Microbes are useful to human being in diverse ways. Which of the following products are formed by fermentive activity of yeast?

Statement I: Lipases are used in detergent formulations
Statement II: Lipases are used to removing oily stains

Yeast have been used for the commercial production of
I. ethanol
II. bread
III. cheese
Choose the correct option

The natural method of pest and pathogen control involving use of viruses, bacteria and other insects is called

Which of the following is a commercial blood cholesterol lowering agent ?

The Trichoderma polysporum produces

Penicillin was discovered by

$Vit - {B_2}$ is prosthetic group of?

Which of the following statements are CORRECT?

(a) Rum, Beer and Brandy are produced without distillation.

(b) Roquefort cheese has large holes.

(c) Some microbes can be observed at $100^\circ C.$

(d) Methanogen is an example of Methanobacterium belonging to group of eubacteria.

Benefits of mycorrhizae are
I. resistance to root borne pathogen
II. tolerance to salinity and pathogen
III. overall increase in the plant growth and development
Choose the correct option

Neem tree has acquired industrial importance as a source of

Which is produced during anaerobic fermentation of agricultural wastes?

Methanogens are found in
I. organic acid
II. rumen of cattle
III. butanal
IV. anaerobic sludge
Choose the correct option

The organisms which are used to enrich the nutrient quality of the soil are called

In the sewage treatment bacterial flocs are allowed to sediment in a settling-tank. This sediment is called as

Citric acid is industrially best produced by

Which is wrongly matched?

Sewage contains large amounts of …A… and …B… . Here A and B refers to

Consider the following statements about, secondary sewage treatment
I. In secondary treatment useful aerobic microbes grow rapidly and form flocs. Flocs are masses of bacteria associated with fungal filaments to form mesh-like structures.
II. The growing microbes consume organic matter and thus reduce the biochemical oxygen demand.
When BOD of sewage has reduced, the effluent is passed into settling tank.
III. In settling tank, the bacterial flocs settle and the sediment is called activated sludge.
IV. A small part of the sludge is used as an inoculum in the aeration tank and the remaining part is passed into large tanks called anaerobic sludge digesters.
V. In the digesters, heterotrophic microbes anaerobically digest bacteria and fungi in sludge producing mixture of gases such as, carbon dioxide nitrogen and carbon monoxide which form the biogas
Which of the statements given above are correct?

The starter or inoculum is added to the fresh milk in order to convert milk into curd, the term starter or inoculum here refers to

The microorganism used in production of biogas is

Bacillus thuringiensis (Bt) strains have been used for designing novel

Consider the following statements about methanogens bacteria
I. Methanogen bacteria are commonly found in the anaerobic sludge formed during sewage treatment
II. These bacteria are also occur in rumen of the cattle where they act upon cellulosic material to breakdown cellulose
III. They play a very important role in the nutrition of cattle by digesting cellulosic material
Which of the statement given above are correct?

Cholesterol lowering agent called statins are produced by

BOD of waste water is estimated by measuring the amount of

Biochemical Oxygen Demand (BOD) in a river water

Activated sludge have the ability to settle quickly so that it can

Which of the following acts as competitively inhibiting enzyme responsible for synthesis of cholesterol?