alleryStart learning →In ripening fruit, ethylene stimulates which conversion?
ASugars into starch and organic acids
BStarch and acids into simple sugars
CProteins into starch and amino acids
DStarch into cellulose and cell walls
Answer & Solution
Correct answer: B. Starch and acids into simple sugars
1. Ethylene is a volatile gas produced by ageing tissues and by the nodes of stems.
2. Its best known effect is the promotion of fruit ripening.
3. It does this by stimulating the conversion of starch and acids to sugars, which is why ripe fruit tastes sweet.
4. Running the conversion the other way, from sugars into starch, would make fruit less palatable rather than more.
5. Commercial fruit growers use applications of the gas to control the timing of ripening.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.6 Plant Sensory Systems and Responses_
Keep practising Plant Form and Physiology
Browse all Plant Form and Physiology questions for ICAR JRF, or explore more Plant Sciences topics.
Related questions
Which defence compound of the cassava root becomes toxic only after a herbivore eats it?A tree exposed to constant strong wind shows which developmental response?Jasmonates elicit the synthesis of volatile compounds that attract which agents?Low soil moisture raises the level of abscisic acid, which then does what?Gibberellins are described as a group of about how many closely related hormones?The effect of cytokinins was first reported after adding what to plant embryos in culture?Which is the only naturally occurring auxin that shows physiological activity?Which organelles settle downward in gravity sensing cells and are also called statoliths?