Plant Growth and Development Test

Question 1
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A hormone found in a gaseous state is?

A
Auxin.

B
Gibberellin.

C
Cytokinin.

D
Ethylene.

Question 2
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Formation of which tissue is example of dedifferentiation?

A
Interfascicular cambium

B
Apical meristem

C
Intrafascicular cambium

D
Intercalary meristem

Question 3
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Stem elongation caused by

A
Gibberellin and florigen

B
Auxin and gibberellin

C
Florigen and kinin

D
Kinin and auxin

Question 4
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Auxin-B was first isolated by

A
Kogl and Erxleben

B
Kogl, Erxleben and Haagen-Smith

C
Miller and Skoog

D
Yabuta and Sumiki

Question 5
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Antiauxin used in picking cotton balls is .........

A
NPA

B
2, 4D

C
TIBA

D
Both (A) and (C)

Question 6
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The common biosynthetic inhibitor of gibberellic acid is

A
Rosacic acid

B
CCC

C
Citric acid

D
Lactic acid

Question 7
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Commonly used auxin in callus and suspension cultures is

A
Napthalene acetic acid

B
Indole-3-butyric acid

C
2, 4, 5-trichlorophenoxy acetic acid

D
dichlorophenoxy acetic acid (2-4 D)

E
Abscisic acid

Question 8
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Kinetin was first isolated and identified by

A
Charles Darwin

B
Boysen and Jansen

C
Paal

D
Miller

Question 9
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The following experiment was performed to test the effect of auxin on plant growth: Study and answer question.

The auxin was dissolved in a gelatin block; gelatin does not affect the biological activity of the auxin. Several plant seedlings were prepared in a gelatin block; gelatin does not affect the biological, activity of the auxin. Several plant seedlings were prepared as described above and growth was measured every 5 days.

Based on the results of the experiment, one can conclude that the tip of the plant contains ....................

In a separate experiment, an auxin/gelatin block applied to only half the cut edge of the tip caused the plant to grow and bend in the opposite direction. For example, if the auxin/gelatin block was applied to the left side of the cut edge, the plant grew and bent toward the light.

Which of the following is the most likely explanation for this observation?

A
Sunlight caused the plant to bend.

B
The plant exhibited gravitropism.

C
Auxin stimulated cell division on the opposite side of the plant.

D
Auxin stimulated cell division on the same side of the plant.

E
Auxin stimulated cell growth toward a light.

Question 10
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Which of the growth substance acts a stimulant during nodule formation in leguminous plant?

A
Ethylene

B
ABA

C
IAA

D
Morphactin

Submit Test

Plant Growth an...

Question 1

Auxin.

Gibberellin.

Cytokinin.

Ethylene.

Question 2

Interfascicular cambium

Apical meristem

Intrafascicular cambium

Intercalary meristem

Question 3

Gibberellin and florigen

Auxin and gibberellin

Florigen and kinin

Kinin and auxin

Question 4

Kogl and Erxleben

Kogl, Erxleben and Haagen-Smith

Miller and Skoog

Yabuta and Sumiki

Question 5

NPA

2, 4D

TIBA

Both (A) and (C)

Question 6

Rosacic acid

CCC

Citric acid

Lactic acid

Question 7

Napthalene acetic acid

Indole-3-butyric acid

2, 4, 5-trichlorophenoxy acetic acid

dichlorophenoxy acetic acid (2-4 D)

Abscisic acid

Question 8

Charles Darwin

Boysen and Jansen

Paal

Miller

Question 9

Sunlight caused the plant to bend.

The plant exhibited gravitropism.

Auxin stimulated cell division on the opposite side of the plant.

Auxin stimulated cell division on the same side of the plant.

Auxin stimulated cell growth toward a light.

Question 10

Ethylene

ABA

IAA

Morphactin

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