Question

Which of the following treatment will convert starch directly into glucose?

• A. Heating with dilute $H_{2}SO_{4}$
• B. Fermentaions by diastase
• C. Fermentation by zymase
• D. Heating with dilute NaOH

Answer 1

Answer: (A)

Heating with dilute $H_{2}SO_{4}$

Answer 2

Fermentation by diastase will convert starch into maltose but not into glucose. Zymase does not effect starch. Further, dilute NaOH will not hydrolyse starch because the various glucose unit in it are linked to each other by glycosidic (either) linkages which are resistant to hydrolysis by NaOH. Thus, only dilute $H_{2}SO_{4}$will hydrolyse starch into glucose.