Question

Grapes hanging on the plant do not ferment but after being plucking from the tree can be fermented. Why? Which type of chemical change is fermentation?

Answer 1

Answer:

Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes. In biochemistry, it is narrowly defined as the extraction of energy from carbohydrates in the absence of oxygen.

EXPLANATION:

When grapes are hanging on the plant, they are alive and so the cells do not allow bacterial growth.Also the cells have active metabolism

But, when they are plucked from the plant, all the cells of the grape either become dormant i.e seeds or die i.e parenchyma in the fleshy part of the fruit.

Hence, bacteria can easily attack and decompose the grape.