Which gaseous plant hormone accelerates the ripening of climacteric fruits like bananas and mangoes?
Answer and explanation
Correct answer: B. Ethylene
- Step 1: Ethylene (C2H4) is a volatile hydrocarbon hormone synthesized from methionine via ACC. Step 2. It triggers the climacteric respiratory burst, starch breakdown into sugars, and tissue softening in ripening fruits. Answer: Ethylene. Why not the others: Auxin delays ripening; Cytokinin maintains green chlorophyll; Abscisic acid promotes dormancy and abscission.
Practise more Plant Physiology, Plant Diversity and Ecology.
Free questions with an explanation for every one, and full timed Medical College Admission Test (Bangladesh) mock tests.
More Plant Physiology, Plant Diversity and Ecology questions
- What is the primary electron donor whose photolysis produces molecular oxygen during light reactions of photosynthesis?
- What is the primary CO2 acceptor molecule in the C3 photosynthetic pathway (Calvin Cycle)?
- What is the first stable chemical product formed after carbon fixation in the C3 pathway?
- What is the primary CO2 acceptor in the mesophyll cells of C4 plants (such as Maize and Sugarcane)? (Hard)
- Which specialized anatomical feature characterizes the leaves of C4 plants?
- In which cellular compartment does Glycolysis (EMP pathway) take place in all living cells?