Plant Growth and Development Test

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Plant Growth and Development Test - 10

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Weekly Quiz Competition

Question 1
1 / -0

Ethylene gas ...............

A
Is a saturated hydrocarbon.

B
Slows down the ripening of apples.

C
Retards ripening of tomatoes.

D
Speeds up maturation of fruits and early ripening of some fruits.

Solution

Ethylene gas is a phytohormone which acts in early ripening of fruits when sprayed on to it. In the case of flowering - it helps in retarding flowering; except in pineapple where it accelerates flowering in off season
Question 2
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Which of the following is sprayed for flowering in pineapple

A
Auxins

B
Gibberellins

C
IAA

D
Cytokinin
Question 3
1 / -0

Which of the following induces cell division in a cell?

A
Cytokinin

B
Gibberellins

C
Auxins

D
ABA

Solution

Cytokinin is the plant hormone which is responsible for the mitotic cell divisions. It stimulates cellular division by hastening the transition of cell from G2 phase to the M phase of the cell.
Question 4
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Phototropic movements in plants are due to?

A
Auxin

B
Gibberellins

C
Cytokinin

D
Abscisic acid
Solution
- Auxin is the phytohormone that handles apical dominance and positive phototropism.
- It can cause the cells to elongate on the shaded side, so this side grows more.
- This unequal growth of the two sides results in the stem's growth towards the light.
So, the correct answer is option A.
Question 5
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Which one of the following responses of plants to growth hormones is true for ethylene?

A
Increase in cell elongation

B
Decrease in the formation of female flowers

C
Increase in ripening of fruits

D
Decrease in abscission of flowers

Solution

Ethylene affects fruit - ripening. Normally, when the seeds are mature, ethylene production increases and builds - up within the fruit, resulting in a climacteric event just before seed dispersal. The nuclear protein 'Ethylene Insensitive 2' is regulated by ethylene production, and in turn, regulates other hormones including ABA and stress hormones.
Question 6
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Which hormone is concerned chiefly with cell division in plants?

A
IAA

B
Kinin

C
GA$$_{2}$$

D
2, 4-D

Solution

In botany, plant hormones cytokinins were first called as kinins. But the name was later changed to avoid confusion. In the presence of kitin the rate of mitotic cell division gets increases.
Question 7
1 / -0

Which one of the following triggers the ripening of fruits?

A
Ethylene

B
Indoleacetic acid

C
Gibberellic acid

D
Kinetin

Solution

Ethylene is the gaseous hormone that stimulates growth and development of floral organs and promotes fruit ripening. It does so by causing softening of fruit due to enzymatic breakdown of cell walls, starch hydrolysis, sugar accumulation and disappearance of organic acids and phenolic compounds. Thus, option A is correct.
Question 8
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Fruit ripening hormone is

A
Kinetin

B
Gibberellin

C
Ethylene

D
Indole acetic acid
Question 9
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Auxins are

A
Vitamins

B
Enzymes

C
Proteins

D
Hormones

Solution

The auxins are the plant growth hormones which are released by the plant cells. These hormones are also called as the growth regulators which are involved in various processes in the plant body. It promotes the growth by the elongation of cells in the apical meristem and the cambium in the culture cells. The most commonly known auxin is the IAA (Indole acetic acid)
So, the correct answer is 'Hormones'
Question 10
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Vernalization is also called as

A
Springification

B
Yarovization

C
Chilling effect

D
All of the above

Solution

Vernalization (from Latin vernus, "of the spring") is the induction of a plant's flowering process by exposure to the prolonged cold of winter. All the other words 'spiringification', 'yarovization' (Russian word), 'chilling effect' have the same meaning as the word 'Vernalization'.
So, the correct answer is option D.

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Plant Growth and Development Test - 10

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Plant Growth and Development Test - 10

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SHARING IS CARING

Question 1

Is a saturated hydrocarbon.

Slows down the ripening of apples.

Retards ripening of tomatoes.

Speeds up maturation of fruits and early ripening of some fruits.

Solution

Question 2

Auxins

Gibberellins

IAA

Cytokinin

Question 3

Cytokinin

Gibberellins

Auxins

ABA

Solution

Question 4

Auxin

Gibberellins

Cytokinin

Abscisic acid

Solution

Question 5

Increase in cell elongation

Decrease in the formation of female flowers

Increase in ripening of fruits

Decrease in abscission of flowers

Solution

Question 6

IAA

Kinin

GA$$_{2}$$

2, 4-D

Solution

Question 7

Ethylene

Indoleacetic acid

Gibberellic acid

Kinetin

Solution

Question 8

Kinetin

Gibberellin

Ethylene

Indole acetic acid

Question 9

Vitamins

Enzymes

Proteins

Hormones

Solution

Question 10

Springification

Yarovization

Chilling effect

All of the above

Solution

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