Microbes in Human welfare (2022)- Quiz 1

Citric acid is produced by –

• (a) Acetobacter aceti (a bacterium)

• (b) Yeast (a fungus)

• (c) Aspergillus niger (a fungus)

• (d) Streptococcus (a bacterium)

Which of the following bacteria has a role in removing clots from our blood vessels?

• (a) Bacillus thuringiensis

• (b) Clostridium butylicum

• (c) Streptococcus

• (d) Lactobacillus

Statins used for lowering blood-cholesterol level are extracted from –

• (a) algae

• (b) bacteria

• (c) virus

• (d) Yeast

The bioactive molecule Cyclosporin - A is used in –

• (a) whooping cough

• (b) diphtheria

• (c) leprosy

• (d) organ-transplant patients

Cyclosporin A is produced from –

• (a) Trichoderma polysporum (a fungus)

• (b) Bacillus (a bacterium)

• (c) Aspergillus (a fungus)

• (d) all of these

The primary treatment of sewage involves –

• (a) digestion

• (b) decomposition

• (c) sedimentation and filtration

• (d) none of these

The amount of oxygen required by the microbes in the decomposition of organic matter is called –

• (a) chemical oxygen demand

• (b) biochemical oxygen demand

• (c) total oxygen demand

• (d) dissolve oxygen

The mixture of gases released during anaerobic digestion of sludge is called

• (a) methane

• (b) carbon dioxide

• (c) biogas

• (d) flammable gases

Biogas contains –

• (a) CO2

• (b) H2S

• (c) CH4

• (d) all of these

The symbiotic association between fungi and roots of higher plants is called –

• (a) lichen

• (b) mycorrhiza

• (c) biofertilizer

• (d) BOD