Plant Growth and Development Question 46
46. Which combination of gases is suitable for fruit ripening?
[1998]
(a) 80 % $CO_2$ and 20 % $CH_2$
(b) 80 % $CH_4$ and 20 % $CO_2$
(c) 80 % $CO_2$ and 20 % $O_2$
(d) 80 % $C_2 H_4$ and 20 % $CO_2$
Show Answer
Answer : d
Hints & Solutions
(d) Ethylene acts physiologically as a hormone in plants. It stimulates the ripening of fruit, the opening of flowers, and the abscission (or shedding) of leaves. Its biosynthesis starts from methionine with 1-aminocyclopropane1-carboxylic acid (ACC) as a key intermediate.
