Enzymatic activity in fruits and vegetables occurs primarily between which stages?

• A. Maturity and ripening
• B. Harvest and maturity
• C. Pre-harvest and harvest
• D. Ripening and senescence

Answer: (A)

Enzymatic changes that drive the characteristic ripening of fruits occur as the fruit moves from maturity toward full ripeness. During this transition, signals such as ethylene trigger enzymes that remodel the fruit’s tissues—breaking down cell-wall components to soften the flesh, converting starches to sugars, and altering pigments and aroma compounds. That burst of enzyme activity is what produces the textures, colors, and flavors we associate with ripe fruit. Harvest and pre-harvest stages precede these changes, while ripening leads toward senescence and deterioration, so the most active period for these enzymes is the move from maturity to ripening.