XII - CH - 10 - Microbes - Part - 2

Ethanol is commercially produced through a particular species of _ _ _ _ _ _.

• (a) Saccharomyces

• (b) Clostridium

• (c) Trichoderma

• (d) Aspergillus

Which of the following is used to manufacture ethanol from starch?

• (a) Penicillium

• (b) Saccharomyces

• (c) Azotobacter

• (d) Lactobacillus

Yeast (Saccharomyces cerevisiae) is used in the industrial production of

• (a) tetracyline

• (b) ethanol

• (c) butanol

• (d) citric acid

Which of the following microorganisms is used for production of citric acid in industries?

• (a) Aspergillus niger

• (b) Rhizopus nigricans

• (c) Lactobacillus bulgaris

• (d) Penicillium citrinum

What gases are produced in anaerobic sludge digesters?

• (a) Methane and CO₂ only

• (b) Methane, Hydrogen sulphide and CO₂

• (c) Methane, Hydrogen sulphide and O₂

• (d) Hydrogen sulphide and CO₂

Secondary sewage treatment is mainly a

• (a) physical process

• (b) mechanical process

• (c) chemical process

• (d) biological process

Primary sewage treatment is mainly a

• (a) physical process

• (b) mechanical process

• (c) chemical process

• (d) biological process

A common biocontrol agent for the control of insect is _ _ _ _ _

• (a) baculovirus

• (b) Bacillus thuringiensis

• (c) Glomus

• (d) Trichoderma

Which one of the following is not a biofertiliser?

• (a) Agrobacterium

• (b) Rhizobium

• (c) Azolla

• (d) Mycorrhiza

Which of the following fern is an excellent biofertilizer?

• (a) Marsilea

• (b) Pteridium

• (c) Azolla

• (d) Salvinia