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