What is the role of enzyme invertase and zymase in the manufacture of ethanol from molasses?

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Solution

Invertase is the enzyme which converts the sucrose into glucose and fructose. The enzyme causes breakdown of the sucrose to form simple sugars.
C $_{12}$ H $_{22}$ O $_{11}$ + H $_{2}$ O $\to$ C $_{6}$ H $_{12}$ O $_{6}$ + C $_{6}$ H $_{12}$ O $_{6}$
Zymase is the enzyme which converts glucose and fructose into ethanol and carbon dioxide.
C $_{6}$ H $_{12}$ O $_{6}$ $\to$ 2C $_{2}$ H $_{5}$ OH + 2 CO $_{2}$ .

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Explain the manufacture of ethanol from molasses.

Name the gas evolved during fermentation process. List the two products formed when enzyme invertase reacts with sugar present in molasses. [2 MARKS]

C_{12} H_{22} O_{11} I n v e r t a s e - ----- \to C_{6} H_{12} O_{6} + . . . A . . .

A Z y m a s e - ---- \to B + 2 C O_{2}

A

B

Column I	Column II
$(A)$ Maltose $\to$ Glucose	$(i)$ Zymase
$(B)$ Sucrose $\to$ Glucose $+$ Fructose	$(i i)$ Pepsin
$(C)$ Glucose $\to$ Ethyl alcohol $+ C O_{2}$	$(i i i)$ Maltase
$(D)$ Starch $\to$ Maltose	$(i v)$ Invertase
$(E)$ Proteins $\to$ Amino acids	$(v)$ Diastase

C_{12} H_{22} O_{11} I n v e r t a s e - ----- \to C_{6} H_{12} O_{6} + . . . A . . .

A Z y m a s e - ---- \to B + 2 C O_{2}

B

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