Discussion
Assertion (A): Molasses dominates fuel ethanol production in cane growing countries.
Reason (R): Its sugars are already fermentable and need no pretreatment.
Select the correct answer from the options below.
Answer: A
Correct answer: Both A and R are true, and R is the correct explanation of A
Both statements are true and the reason explains the dominance. The sugars in molasses are sucrose, glucose and fructose, all directly fermentable, so the process needs only dilution and nutrient adjustment.
Every alternative feedstock requires the sugar to be released first - saccharification for starch, pretreatment and enzymatic hydrolysis for lignocellulose - and those stages carry most of the cost. Molasses also arises concentrated at the sugar factory, so collection costs nothing, which reinforces the advantage.
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