During its formation, bread becomes porous due to CO2 released by
A
Protozoans
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B
Bacteria
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C
Yeast
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D
Viruses
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Solution
The correct option is B Yeast Bread is prepared from the dough, which is fermented using baker's yeast ( Saccharomyces cerevisiae ). The puffed-up appearance of dough is due to the production of carbon dioxide during fermentation. Carbon dioxide gas along with ethyl alcohol evaporate during baking, making bread porous and soft.