Plant Growth and Development Test

Question 1
1 / -0

Which of the following properties is shown by cytokinins?

A
Delay in leaf senescence

B
Cause leaf abscission

C
Promote seed dormancy

D
Promote stornatal closing

Question 2
1 / -0

The bioassay of auxin is

A
Avena curvature test

B
Callus formation

C
Culture of fungus

D
Seed dormancy

Question 3
1 / -0

The discovery of gibberellins is related with one of the following?

A
Blast disease of rice

B
Rust disease of wheat

C
'Bakanae' disease of rice

D
Early blight disease of potato

Question 4
1 / -0

Genetic dwarfism can be overcome by

A
Gibberellin

B
Ethylene

C
Auxin

D
ABA

Question 5
1 / -0

I. Assertion: Seeds and growing fruit are rich in cytokinin.
II. Reason: Cytokinin promotes cell division.

A
I and II both are true, II is not correct explanation for I

B
I and II both are false

C
I is false II is true

D
I and II both are true, II is correct explanation for I

Question 6
1 / -0

To test the effect of an auxin on plant growth, the auxin was dissolved in a gelatin block. Several plant seedlings were prepared and growth was measured every five days.
Plant
Growth after 5 days
Growth after 10 days
1
15 mm
29 mm
2
4 mm
9 mm
3
5 mm
10 mm
4
14 mm
31 mm
5
8 mm
20 mm
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 gelatin block was applied to the left side of the cut edge, the plant grew and bent toward the right. 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 source

Question 7
1 / -0

"One bad apple spoils the whole barrel" because of

A
Ethylene gas

B
Abscisic acid

C
Auxin

D
Gibberellins

E
Cytokinins

Question 8
1 / -0

Which hormone is responsible for spoiling the whole barrel containing one bad apple?

A
Ethylene gas

B
Abscisic acid

C
Auxin

D
Gibberellins

E
Cytokinins

Question 9
1 / -0

Name of a gaseous plant hormone is

A
IAA

B
Gibberellin

C
Ethylene

D
Abscisic acid

Question 10
1 / -0

In the fall, the leaves of deciduous trees change color, fall off and die. This shedding of leaves is Mated by which of the following plant hormones?

A
auxin

B
gibberellin

C
abscisic acid

D
cytokinin

E
ethylene

Submit Test

Plant	Growth after 5 days	Growth after 10 days
1	15 mm	29 mm
2	4 mm	9 mm
3	5 mm	10 mm
4	14 mm	31 mm
5	8 mm	20 mm

Plant Growth an...

Question 1

Delay in leaf senescence

Cause leaf abscission

Promote seed dormancy

Promote stornatal closing

Question 2

Avena curvature test

Callus formation

Culture of fungus

Seed dormancy

Question 3

Blast disease of rice

Rust disease of wheat

'Bakanae' disease of rice

Early blight disease of potato

Question 4

Gibberellin

Ethylene

Auxin

ABA

Question 5

I and II both are true, II is not correct explanation for I

I and II both are false

I is false II is true

I and II both are true, II is correct explanation for I

Question 6

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 source

Question 7

Ethylene gas

Abscisic acid

Auxin

Gibberellins

Cytokinins

Question 8

Ethylene gas

Abscisic acid

Auxin

Gibberellins

Cytokinins

Question 9

IAA

Gibberellin

Ethylene

Abscisic acid

Question 10

auxin

gibberellin

abscisic acid

cytokinin

ethylene

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