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Auxin and gibberellin are the two plant growth . 

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Important Questions on Control and Coordination

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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
To speed up the malting process in the brewing industry the growth hormone used is:
MEDIUM
Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Spraying sugarcane with gibberellins increases the yield by as much as 20 tonnes per acre. GA performs it by
EASY
Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Plant hormone that can be used to increase length of grape stalk and improvement in the shape of fruit is:
MEDIUM
Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Removal of auxin source demonstrates that leaf abscission is___________ by auxin, and apical dominance is_________ by auxin.
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Dwarfness can be controlled by treating the plant with
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Choose the correct option for auxin.
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Bolting, i.e., internode elongation just prior to flowering in beet, cabbage and many rosette plants, is promoted by
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Apical dominance as expressed in dicotyledonous plants is due to the presence of more _____ in the apical one than in the lateral ones. (Cytokinin/ Auxin)
MEDIUM
Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Read the given statements and select the correct option.
Statement 1: Elongation of reduced stem is possible due to application of gibberellin hormone.
Statement 2: Gibberellin stimulates cell division and cell elongation.
MEDIUM
Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants

Read the following statements:

(i) It is used to prepare weed-free lawn.

(ii) It promotes the abscission of older mature leaves and fruits. The above functions are carried out by

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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
The hormone responsible for apical dominance is
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Functions of auxins include:
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Auxins that have been isolated from plants are
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
The fruits can be left on the tree longer using GA so as to extend the market period. This is due to which function of GA ?
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants

Read the following statements, and select the correct option.

A. 2,4-D is widely used to kill dicotyledonous weeds but does not affect mature monocotyledonous plants.

B. ABA helps seed understand desiccation and other factors unfavorable for growth.

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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Phototropic Curvature is the result of uneven distribution of
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants

Fill in the blank with the correct option from the bracket.

_____ hormone initiate rooting in stem cuttings. (Gibberellin, Ethylene, Auxin, ABA)

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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
Growth-dependent movements called the _____ (tropic/nastic) movements.
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants

Match the following.

Column – I

Column – II

(a) IAA

(i) Overcoming genetic dwarfing

(b) GA

(ii) Most widely used PGR in agriculture

(c) Cytokinin

(iii) Induced parthenocarpy in tomato

(d) Ethylene

(iv) Coconut milk factor
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Biology>Physiology P2>Control and Coordination>Control and Coordination in Plants
The term ‘antiauxin’ refers to