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.
