Microbes in Human Welfare - Quiz I

The dough used for making bread is fermented by

• bacteria

• Yeast

• fungi

• algae

Which of the following bacteria convert milk into curd?

• Propionibacterium

• Lactobacillus

• Streptococcus

• Bacillus

The large vessels for growing microbes on an industrial scale are called

• Petri dish

• digestors

• biogas vessel

• fermentors

Which of the following organisms is used in the production of beverages?

• Penicillium notatum

• Saccharomyces cerevisiae

• Aspergillus niger

• Clostridium butylicum

The chemical substances produced by some microbes which can kill or retard the growth of other microbes are called –

• toddy

• lactic acid

• antibiotics

• ethanol

Which of the following antibiotics was discovered first?

• Streptomycin

• Neomycin

• Erythromycin

• Penicillin

Citric acid is produced by –

• Acetobacter aceti (a bacterium)

• Aspergillus niger (a fungus)

• Yeast (a fungus)

• Streptococcus (a bacterium)

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

• Bacillus thuringiensis

• Clostridium butylicum

• Streptococcus

• Lactobacillus

Cyclosporin A is produced from –

• Trichoderma polysporum (a fungus)

• Bacillus (a bacterium)

• Aspergillus (a fungus)

• all of these

The primary treatment of sewage involves –

• digestion

• decomposition

• sedimentation and filtration

• none of these