Postharvest Technology MCQs (Set 4) Posted on August 17, 2026Author agropublishers 0 1. The microbial conversion of sugars into acids, alcohols, or gases is known as _________________ Hydrolysis Oxidation Fermentation Senescence 2. In postharvest management, controlled-atmosphere storage delays fruit ripening primarily by _________________ Increasing temperature Exposing fruit to high light intensity Increasing ethylene production Suppression of respiration and ethylene activity 3. Non-climacteric fruits differ from climacteric fruits in that they _______________________ Show a large respiratory peak at ripening Do not change color during ripening Ripen primarily while attached to the plant and exhibit a limited response to ethylene Do not produce any hormones 4. Which postharvest system is most suitable for a remote village with unreliable electricity and high solar radiation? Large controlled-atmosphere facility Conventional refrigerated warehouse Solar-powered cold storage Freeze-drying plant 5. Which climatic condition can increase the risk of postharvest pathogen development in horticultural produce? Low moisture Dry storage Rapid cooling Warm and humid conditions 6. Plant hormone ____________________ is involved in regulating ripening in both climacteric and non-climacteric fruits Abscisic acid Gibberellin Brassinosteroid Cytokinin 7. Which of the following fruits is classified as non-climacteric? Mango Grape Papaya Banana 8. The increase in fruit sweetness during ripening is primarily a result of _____________________ Increased protein breakdown Degradation of all carbohydrates Synthesis of new starch Hydrolysis of starch into sugars 9. Increased postharvest temperature generally leads to _______________________ Inhibited ethylene production and senescence Prevention of water loss and weight increase Increased ethylene production and accelerated ripening Reduced respiration and senescence 10. Which statement most accurately describes the respective roles of abscisic acid (ABA) and ethylene during tomato fruit ripening? Ethylene inhibits ABA biosynthesis completely ABA decreases while ethylene increases, with no interaction ABA and ethylene act independently with no crosstalk ABA levels rise before ethylene and promote ethylene biosynthesis and signaling Loading … Question 1 of 10
