Postharvest Technology MCQs (Set 7) Posted on August 22, 2026Author agropublishers 0 1. In postharvest fruit physiology, the conversion of 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylene is catalyzed by ___________________ Pectin methylesterase ACC oxidase Polygalacturonase ACC synthase 2. Excessive fruit softening after harvest, increases their susceptibility to _______________ Improved transportability Bruising and microbial infection Water absorption Reduced pathogen infection 3. Which sequence contains only postharvest technologies or operations? Irrigation, fertilization and pruning Soil preparation, irrigation and harvesting Pollination, flowering and fertilization Sorting, grading, packaging, storage and transportation 4. Which external condition generally increases water loss from harvested horticultural produce? High relative humidity Reduced air movement Low relative humidity Low temperature 5. Blossom-end rot in tomatoes is primarily associated with which of the following conditions? Lowered oxygen levels during storage Increased ethylene production during postharvest storage Postharvest fungal infection Disrupted calcium homeostasis and irregular water supply during fruit development 6. Which postharvest treatment predominantly promotes fruit coloration and early ripening in green-ripe tomato fruit? Exogenous application of 5-Aminolevulinic acid (ALA) High-density polyethylene Vacuum packaging Hydrogen-rich water 7. What is the importance of maintaining horticultural quality beyond considerations of physical appearance? Horticultural products provide essential nutrients and bioactive compounds with potential functional food and nutraceutical value Fruit and vegetables have no nutritional significance Quality has no relationship with human nutrition Only appearance determines their nutritional value 8. In postharvest management of horticultural products, typical symptoms of chilling injury in susceptible fruits and vegetables include _____________________ Increased sugar accumulation Pitting, browning, and uneven ripening Improved ripening and firmness Enhanced color development 9. Gibberellin treatment can delay postharvest fruit softening primarily by ____________________________ Increasing cell-wall degradation Retarding physiological processes associated with ripening and senescence Increasing ethylene production Increasing respiration intensity 10. From a postharvest management perspective, fruit ripening generally results in ____________________ Reduced shelf life and increased susceptibility to microbial infection Increased resistance to microbial infection Increased firmness Complete resistance to physical damage Loading … Question 1 of 10
