Match Column 1 with Column 2:
| Column 1 | Column 2 |
| 1) Saccharomyces cerevisiae | a) Acetic acid |
| 2) Propionibacterium sharmanii | b) Penicillin |
| 3) Penicillium notatum | c) Swiss cheese |
| 4) Acetobacter aceti | d) Bread |
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 1-d,2-c,3-b,4-a
(1) Saccharomyces cerevisiae — this matches (d) Bread. This is baker’s yeast. It ferments the dough used for making bread.
(2) Propionibacterium sharmanii — this matches (c) Swiss cheese. This bacterium makes a lot of CO2, which forms the large holes in Swiss cheese.
(3) Penicillium notatum — this matches (b) Penicillin. Alexander Fleming named the first antibiotic, penicillin, after this mould.
(4) Acetobacter aceti — this matches (a) Acetic acid. This bacterium is used in industry to produce acetic acid.
NCERT Extract:
Microbes in Household Products – “… Similarly the dough, which is used for making bread, is fermented using baker’s yeast (Saccharomyces cerevisiae). … For example, the large holes in ‘Swiss cheese’ are due to production of a large amount of CO2 by a bacterium named Propionibacterium sharmanii.”
Antibiotics – “… He found out that it was due to a chemical produced by the mould and he named it Penicillin after the mould Penicillium notatum.”
Chemicals, Enzymes and other Bioactive Molecules – “Microbes are also used for commercial and industrial production of certain chemicals like organic acids, alcohols and enzymes. Examples of acid producers are Aspergillus niger (a fungus) of citric acid, Acetobacter aceti (a bacterium) of acetic acid; …”