Question

Assertion(A)- yeast such as saccharomyces cerevisiae are used in baking industry reason(R)- CO2 produced during fermentation causes bread dough to rise by thermal expansion a- A is correct and R is its explanation b- A is correct and R is not it's explanation c- A is correct and R is wrong d-A and Rbothare correct

Answer 1

yeast is a facultative anaeorobe.Bread dough is the substrate for yeast's respiratory enzymes to act upon in anaerobic conditions. Co2 is a byproduct that causes it to rise up. Thus option (a) is correct

Answer 2

Answer:

A and R is correct and R is its correct explanation of A

Explanation:

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 zymes (glucose to ethyl alcohol and CO2) .

Leavened dough is baked and both alcohol and CO2

evaporate. The bread becomes soft and porous.The carbon dioxide produced in these reactions causes the dough to rise (ferment), and the alcohol produced mostly evaporates from the dough during the baking process. Thousands of tiny bubbles, each surrounded by a thin film of gluten form cells inside the dough piece. The increase in dough size occurs as these cells fill with gas.