Plant Growth and Development Test

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Plant Growth and Development Test - 86

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Weekly Quiz Competition

Question 1
1 / -0

Gibberellin is a

A
Sterol

B
Vitamin

C
Sugar

D
Protein

Solution

Gibberellin is a plant hormone. It is diterpenoids chemically. There are two pathways for the synthesis of gibberellin, mevalonic acid-dependent and mevaloni acid-independent cycle. Mevalonic acid-dependent pathway also involves synthesis of sterol. Second pathway involves synthesis of carotenoids. Farnesyl pyrophosphate in MVA pathway either forms triterpenes and sterols or forms diterpenes and gibberellin.
Thus, the correct answer is a 'Sterol'.
Question 2
1 / -0

Ethylene is connected with

A
Aerobic respiration

B
Climacteric respiration

C
Anaerobic respiration

D
Fermentation

Solution

Ethylene is a plant hormone. It is also called as ripening hormone as it is responsible for ripening of fruits. Fruit ripening is accompanied by increase rate of respiration. The climacteric respiration occurs during fruit ripening which is associated with increased ethylene production. Due to increased respiration, complex carbohydrates are broken down into simpler sugars and cell wall becomes soft.
Thus, the correct answer is option B.
Question 3
1 / -0

Antiauxin used in picking cotton bolls is

A
2, 4-D

B
TIBA

C
NAA

D
Both A and B

Solution

Triidobenzoic Acid (TIBA) is a chemical which act as antiauxin. It is used in picking cotton balls. It is sprayed on the cotton plants to defoliate. This will help in machine picking of cotton balls.
Thus, the correct answer is option B.
Question 4
1 / -0

Common inhibitor of germination is

A
GA

B
ABA

C
Pantothenic acid

D
Tartaric acid

Solution

Abscisic acid is a phytohormone which act as plant growth inhibitor. It is used to maintain the dormancy of seed. It inhibits the germination of seeds in adverse condition and ensures seed germination in favourable condition only.
Thus, the correct answer is option B.
Question 5
1 / -0

Common biosynthetic inhibitor of GA is

A
CCC

B
Jasmonic acid

C
Citric acid

D
Lactic acid

Solution

Gibberelic acid (GA) is a plant hormone that is involved in various physiological processes. It helps in stem elongation, flowering, germination. CCC (2-chloroethyltrimethylammonium chloride) Is a common biosynthetic inhibitor of GA. It inhibits growth in plants and induces early seedset.
Thus, the correct answer is option 'CCC'.
Question 6
1 / -0

Pruning of plants promotes branching due to sensitisation of axillary buds by

A
IAA

B
Ethylene

C
Gibberellin

D
Cytokinin

Solution

Pruning is the method of selectively removing plant parts like branches, buds, leaves, roots. When apical bud is removed, it results in branching due to sensitisation of axillary buds by IAA, a type of auxin. Pruning of any part of plant will give lower axillary buds a chance to pour their auxin into the stem. This makes plant bushy.
Thus, the correct answer is 'IAA'.
Question 7
1 / -0

Match the columns:
Column I Column II
1. Human urine a Cytokinin
2. Gibberella fujikuroi b Auxin
3. Herring fish DNA c Ethylene
4. Ripening fruits d Abscisic acid
5. Aged leaves of plants e Gibberellin

A
1- b, 2- e, 3- a, 4- c, 5- d

B
1- b, 2- c, 3- d, 4- e, 5- a

C
1- a, 2- e, 3- b, 4- d, 5- c

D
1- e, 2- d, 3- c, 4- b, 5- a

E
1- c, 2- b, 3- a, 4- e, 5- d

Solution

Auxin is a plant hormone which was originally purified from human urine byKogl and Haagen-Smit 1931. Gibberellin is a plant hormone which was isolated from fungus Gibberella fujikuroi. It causes Bakanae disease. Miller and Skoog first isolated kinetin, a type of cytokinin hormone from autoclaved herring fish sperm DNA. Ethylene is a plant hormone. It is also called as ripening hormone as it is responsible for ripening of fruits. Abscisic acid is a plant hormone found in high concentration in aged leaves of plants and is responsible for abscission of leaves.
Thus, the correct answer is '1- b, 2- e, 3- a, 4- c, 5- d'.
Question 8
1 / -0

Ethylene is metabolic product of

A
Valine

B
Serine

C
Methionine

D
Glutamic acid

Solution

Ethylene is a metabolic product of methionine. It is synthesized from methionine amino acid by methionine cycle or yang cycle. Methionine is first converted to adenosylmethionine. It is then converted to Aminocyclopropane carboxylic acid. It is then oxidized to form ethylene. It is a gaseous plant hormone which stimulates ripening of fruits in plants.
Thus, the correct answer is option C.
Question 9
1 / -0

Pineapple can be made to produce fruits throughout the year by application of

A
IAA, IBA

B
NAA, 2, 4-D

C
Phenyl acetic acid

D
Cytokinins

Solution

Auxin is a plant hormone. It usually inhibits flowering. However, it promotes flowering in pineapple. IAA (indoleacetic acid) and IBA (indolebutyric acid) are naturally occurring type of auxin hormone. These hormones promote fruit production in pineapple throughout the year. It is also used for synchronizing fruit set.
Thus, the correct answer is 'IAA, IBA'.
Question 10
1 / -0

Phytohormone which induces triple response is

A
IAA

B
ABA

C
$${GA}_{3}$$

D
$${C}_{2}{H}_{4}$$

Solution

Ethylene is a phytohormone which induces triple response in plant. During mechanical stress on the stem, ethylene is produced. It induces seedling to produce triple response and stem grows sidewise. This triple response allows stem to go around an object above.
Thus, the correct answer is option D.

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	Column I		Column II
1.	Human urine	a	Cytokinin
2.	Gibberella fujikuroi	b	Auxin
3.	Herring fish DNA	c	Ethylene
4.	Ripening fruits	d	Abscisic acid
5.	Aged leaves of plants	e	Gibberellin

Plant Growth and Development Test - 86

Result

Plant Growth and Development Test - 86

Score

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SHARING IS CARING

Question 1

Sterol

Vitamin

Sugar

Protein

Solution

Question 2

Aerobic respiration

Climacteric respiration

Anaerobic respiration

Fermentation

Solution

Question 3

2, 4-D

TIBA

NAA

Both A and B

Solution

Question 4

GA

ABA

Pantothenic acid

Tartaric acid

Solution

Question 5

CCC

Jasmonic acid

Citric acid

Lactic acid

Solution

Question 6

IAA

Ethylene

Gibberellin

Cytokinin

Solution

Question 7

1- b, 2- e, 3- a, 4- c, 5- d

1- b, 2- c, 3- d, 4- e, 5- a

1- a, 2- e, 3- b, 4- d, 5- c

1- e, 2- d, 3- c, 4- b, 5- a

1- c, 2- b, 3- a, 4- e, 5- d

Solution

Question 8

Valine

Serine

Methionine

Glutamic acid

Solution

Question 9

IAA, IBA

NAA, 2, 4-D

Phenyl acetic acid

Cytokinins

Solution

Question 10

IAA

ABA

$${GA}_{3}$$

$${C}_{2}{H}_{4}$$

Solution

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