In the following questions, Statement of assertion (A) is followed by a statement of reason (R). 1. If both assertion and reason are true and the reason is the correct explanation of the assertion, then mark. 2. If both assertion and reason are true but the reason is not the correct explanation of the assertion, then mark. 3. If assertion is true statement but reason is false, then mark. 4. If both assertion and reason are false statements then mark.
Assertion: Yeasts such as Saccharomyces cerevisiae are used in baking industry. Reason: Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.A) 1
B) 2
C) 3
D) 4
Correct Answer: A
Solution :
Bakers yeast (Saccharomyces cerevisiae) is added to flour during kneading. Yeast secretes enzymes like amylase (change some starch to maltose), maltase (maltose to glucose) and zymase (glucose to ethyl alcohol and \[C{{O}_{2}}\]). The dough swells up or leavens. Leavend dough is backed and both alcohol and \[C{{O}_{2}}\] evoporate. The bread becomes soft and porous.
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