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Ethylene

Ripening of f...

Question

Ripening of fruits in plants is promoted by:

A

Ethylene

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B

Auxin

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C

Cytokinins

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D

Abscisic acid

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Solution

The correct option is A
Ethylene

Ethylene promotes ripening of fruits. Auxin is responsible for the growth of shoots and formation of the fruits. Cytokinins stimulate the cell division in plants to promote growth. It does not play a specific role in ripening of fruit.

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Q. Match the columns and choose the correct combination.

	Growth Regulator		Action
$(a)$	Abscisic acid	$(1)$	Delays leaf abscission
$(b)$	Ethylene	$(2)$	Inhibits seed germination
$(c)$	Cytokinin	$(3)$	Herbicide
$(d)$	Auxin	$(4)$	Hastens fruit ripening

Q. Match the entries in Column - I with those of Column - II and choose the correct answer:

	Column - I		Column - II
(A)	Cytokinins	(P)	Stress hormone
(B)	Auxins	(Q)	Ripening of fruits
(C)	Abscisic acid	(R)	Apical dominance
(D)	Ethylene	(S)	Bolting
		(T)	Richmond Lang effect

Q. Match the columns and choose the correct combination.

	I		II
(a)	Cytokinin	(p)	Stress hormone
(b)	Auxins	(q)	Ripening of fruits
(c)	Abscisic acid	(r)	Apical dominance
(d)	Ethylene	(s)	Bolting
		(t)	Richmond-Lang Effect

Q. Match the items in Column I with Column II and choose the correct option.

	List I		List II
A	Human urine	1	Cytokinin
B	Gibberella fujikuroi	2	Auxin
C	Herring fish DNA	3	Ethylene
D	Ripening fruits	4	Abscisic acid
E	Aged leaves of plants	5	Gibberellins

Q. Match the plant hormones listed in column I with their major role listed in column II and select the corret option from the codes given below.

Column I	Column II
(A) Auxin	(i) Fruit ripening
(B) Cytokinin	(ii) Phototropism
(C) Abscisic acid	(iii) Suppression of cell division
(D) Ethylene	(iv) Stomatal opening and closing
	(v) Growth of lateral buds

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