Which one of the following statement(s) is/are false?
(1)C₂H₄ promotes leaf senescence.
(2)C₂H₄ speeds the ripening of fruits.
(3)C₂H₄ causes apical hook formation.
(4)C₂H₄ promotes horizontal growth of seedling and swelling of axis.
(5)C₂H₄ promotes male flowers in cucumber thereby increasing the yield.

All the statements
(1) and (5)
(2) and (4)
Only (5)

The conditions necessary for vernalization are
(1)high temperature and water
(2)low temperature and oxygen
(3)water and carbon dioxide
(4)oxygen and water.

(1), (2), and (3)
(1) and (2)
(2) and (4)
(1) and (3)

Which of the following statements are false ?
(1)C₂H₄ breaks seed and bud dormancy.
(2)ABA stimulates the opening of stomata.
(3)Cytokinin is primarily concerned with cell division.
(4)ABA is synergistic to GA.

(1), (2), and (3)
(1) and (2)
(2) and (4)
(1) and (3)

Match Column I with Column II

Column – I (Scientists)	Column – II (Discovery)
A.Zeatin	1.Flowering hormone
B.Florigen	2.Natural auxin
C.IBA	3.Cytokinin
D.NAA	4.Synthetic auxin

A→ 3; B→ 1; C→ 4; D→ 2
A→ 3; B→ 4; C→ 1; D→ 2
A→ 2; B→ 1; C→ 4; D→ 3
A→ 1; B→ 2; C→ 3; D→ 4

Match Column I with Column II

Column – I (Scientists)	Column – II (Discovery)
A. Auxin	1. Herring sperm DNA
B.Cytokinin	2. Inhibitor of growth
C. Gibberellin	3. Apical dominance
D.Ethylene	4.Epinasty
E. Abscisic acid	5.Induces amylase synthesis

A→ 3; B→ 1; C→ 5; D→ 4; E→ 2
A→ 4; B→ 5; C→ 1; D→ 3; E→ 2
A→ 2; B→ 1; C→ 5; D→ 3; E→ 4
A→ 3; B→ 1; C→ 5; D→ 2; E→ 4

Match Column I with Column II

Column – I (Scientists)	Column – II (Discovery)
A. C.Darwin and F.Darwin	1. Cytokin in
B.Miller and Skoog	2. ABA
C. Addicott ctal	3. C₂H₄
D.Kurosawa	4.Auxin
	5.GA

A→ 4; B→ 1; C→ 2; D→ 5
A→ 4; B→ 1; C→ 5; D→ 2
A→ 3; B→ 1; C→ 2; D→ 4
A→ 5; B→ 4; C→ 1; D→ 3

Which of the following shows the correct graph of arithmetic growth?

The picture below shows a graph drawn on the parameters of growth versus time. A, B, C respectively represent.

Exponential Phase Log phase Steady state phase
Steady state phase Log phase Log phase
Log phase Steady state phase Logarithmic phase
Log phase Lag phase Steady state phase

The pineapple which under natural conditions is difficult to blossom has been made to produce fruits throughout the year by application of

IAA, IBA
NAA, 2, 4-D
Phenyl acetic acid
Cytokinin

Solution

Plants which are difficult to flower can be made to do so by spraying them with 2, 4, –D (2, 4 – dichlorophenoxy acetic acid) and NAA (napthalene acetic acid) which are synthetic auxins, e.g., litchi, pineapple.

During seed germination its stored food is mobilized

Cytokinin
ABA
Gibberellin
Ethylene

Solution

Gibberellins stimulate the synthesis of a-amylase and proteases enzyme in germinating grains of cereals. They are involved in the conversion of starch into sugar. The proteases convert an inactive b-amylase to the active form. The active b-amylase and a-amylase together digest starch to glucose which is mobilized to meet the metabolic demands of embryo.

UnAttempted

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Attempted

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Correct

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Wrong

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Complete