Postharvest Technology MCQs (Set 6) Posted on August 22, 2026Author agropublishers 0 1. Which physiological response can be reduced by gibberellin treatment during postharvest storage? Photosynthesis Seed germination Water absorption Respiration intensity 2. Considering postharvest physiology, the immediate precursor of ethylene in its biosynthetic pathway is __________________ Methionine 1-Aminocyclopropane-1-carboxylic acid (ACC) Acetaldehyde Sucrose 3. Fruits and vegetables remain metabolically active after harvest because they _________________________ Continue certain physiological processes Continue photosynthesis at the same rate as before harvest Stop all physiological processes immediately Become physiologically inactive 4. Under low oxygen conditions, fruits and vegetables may shift to anaerobic respiration, resulting in the production of ________________ Chlorophyll and carotenoids Pectin and cellulose Sucrose and starch Acetaldehyde and ethanol 5. Which approach is most appropriate for reducing postharvest losses throughout the supply chain? Focusing exclusively on harvesting Focusing exclusively on storage Focusing exclusively on packaging Integrating production, harvesting, handling, storage, transportation, and marketing practices 6. The accumulation of ethanol and acetaldehyde during storage can cause ____________ Increased firmness Unpleasant off-flavors Improved aroma Enhanced nutritional quality 7. In postharvest physiology, transpiration in harvested fruits and vegetables primarily results in _______________ Increased respiration efficiency Water loss, wilting, shriveling, and loss of firmness Improved turgidity Increased sugar and water accumulation 8. Bent-neck is an important postharvest disorder particularly associated with ____________ Tomatoes Cut roses Potatoes Apples 9. Which postharvest-related disorders have been linked to calcium nutrition? Blossom-end rot in tomato Chilling injury None of these Fungal decay 10. In harvested fruits and vegetables, respiration involves the oxidative breakdown of ______________________ Minerals and vitamins Proteins Stored carbohydrates and organic acids Cellulose Loading … Question 1 of 10