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