Plant Growth and Development Test

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Plant Growth and Development Test - 77

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Weekly Quiz Competition

Question 1
1 / -0

A plant hormone related with inhibition of Sensecene is

A
Ethylene

B
ABA

C
Bromic acid

D
GA

Solution

GA inhibits or slows down senescence by reducing the effect of ethylene, the senescence hormone.
GA when added delays degradation of chlorophyll in leaves and prevents inrolling of flower petals, which may occur due to greater ethylene concentrations. It reduces ethylene sensitivity of plant parts.
So, the correct answer is 'GA'
Question 2
1 / -0

Which of the following is responsible for synthesis of enzyme in seed germination?

A
$$IAA$$

B
$$Gibberellin$$

C
$$Cytokinin $$

D
$$Ethylene.$$

Solution

Gibberellin hormone initiate mobilization of storage materials in seeds during germination, cause elongation of stems, stimulate bolting in biennials, stimulate pollen tube growth.
Thus, the correct answer is 'Gibberellin.'
Question 3
1 / -0

The application of synthetic plant hormone like IAA, IBA and NAA are best described as?

A
Prevent early fruit fall before harvesting and its used to produce parthenocarpic fruit

B
Prevent early fruit tall only

C
To produce both seed less fruits with seeds

D
To produce larger fruit
Solution
- IAA (Indole acetic acid), IBA ( Indole butyric acid) and NAA (naphthalene acetic acid) these 3 are the type of auxin hormones which is a growth hormone that is using produced at the apical tips of the growing plants.
- They have been widely used in agriculture and horticulture field which is used to promote growth in plants that are grown by cutting methods and also to prevent early ripening of the fruit and dropping of the leaves which retains the nutrients for more time in the plants and allows the fruit to grow bigger in size.
- This is also used in producing parthenocarpic fruits ie the fruits that are formed without fertilization. eg parthenocarpic tomatoes.
So, the correct answer is 'Prevent early fruit fall before harvesting and its used to produce parthenocarpic fruit'.
Question 4
1 / -0

In fruits and seeds _________ hormone is commonly observed.

A
Ethylene

B
Abscissic Acid

C
Cytokinin and Auxin

D
None of the above

Solution

Answer is option C i.e. "Cytokinin and Auxin"
The auxin and cytokinin levels increases in the seed during it's development. They help in the growth of the fruit, phases of cell division and cell expansion inside the fruit. The seeds and fruits are rich source of hormones such as auxin and cytokinin. These hormones are responsible for the growth of the tissues present in the fruits and helps in determining the fruit size.
Question 5
1 / -0

Fruit ripening is promoted by the hormone that?

A
Promotes thinning of fruits in cherry and walnut

B
Induce parthenocarpy in tomato

C
Promotes flowering in Lemna

D
Is derived from tRNA
Question 6
1 / -0

Which of the following is not the a plant growth inhibitor

A
Dormin

B
$$IAA$$

C
Ethylene

D
$$ABA$$
Question 7
1 / -0

Identify the physiological process induced by two phytohormones having a common precursor which is formed due to catalytic activity of pyruvic dehydrogenase complex
(a) More female flowers in Cucumber
(b) $$\alpha$$-amylase production in Barley grains
(c) Acceleration of fruit ripening in Tomato
(d) Delay in sprouting of Potato tubers.

A
a, b

B
a, c

C
c, d

D
b, d
Question 8
1 / -0

Plant growth is unique in being?

A
Closed

B
Unlimited

C
Diffused

D
Limited
Question 9
1 / -0

Which of the following do not fall under triple response of ethylene?

A
Inhibition of internodal elongation

B
Swelling of the sxis

C
Fruit response

D
Horizontal growth of seedling
Question 10
1 / -0

Lettuce hypocotyl elongation test is performed for bioassay of?

A
Gibberellin

B
Ethylene

C
Cytokinin

D
ABA

Solution

Answer :
i) Relationship between calcium ions and gibberellic acid (GA3)-induced growth in the excised hypocotyl of lettuce.
ii) Gibberellin controls extension growth in lettuce hypocotyl sections by regulating the uptake of Ca(2+) by the hypocotyl cells.
So correct answer is option A.Gibberellin.

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Plant Growth and Development Test - 77

Result

Plant Growth and Development Test - 77

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SHARING IS CARING

Question 1

Ethylene

ABA

Bromic acid

GA

Solution

Question 2

$$IAA$$

$$Gibberellin$$

$$Cytokinin $$

$$Ethylene.$$

Solution

Question 3

Prevent early fruit fall before harvesting and its used to produce parthenocarpic fruit

Prevent early fruit tall only

To produce both seed less fruits with seeds

To produce larger fruit

Solution

Question 4

Ethylene

Abscissic Acid

Cytokinin and Auxin

None of the above

Solution

Question 5

Promotes thinning of fruits in cherry and walnut

Induce parthenocarpy in tomato

Promotes flowering in Lemna

Is derived from tRNA

Question 6

Dormin

$$IAA$$

Ethylene

$$ABA$$

Question 7

a, b

a, c

c, d

b, d

Question 8

Closed

Unlimited

Diffused

Limited

Question 9

Inhibition of internodal elongation

Swelling of the sxis

Fruit response

Horizontal growth of seedling

Question 10

Gibberellin

Ethylene

Cytokinin

ABA

Solution

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