Cytokinin

Q.

What are the physiological effect of Auxin?

Q. Which of the following type of phytohormones resembles nucleic acids in structure?

1. Cytokinins

2. Auxins

3. ABA

4. Gibberellins

Q. The role of cytokinins in delay of leaf senescence is called __ effect

Q. Hormone responsible for senescence:

1. ABA
2. Auxin
3. GA
4. Cytokinin

Q. Select the correct statement(s).

1. Transgenic models exist for many human diseases such as cystic fibrosis, Alzheimer’s disease, cancer and rheumatoid arthritis.
2. All of the above
3. GEAC takes many issues into consideration, including patent terms emergency provisions and research and development initiative
4. Indian Parliament has recently cleared the second
   amendment of the Indian Patents Bill which makes decisions regarding the validity of GM research.
   

Q.

A plant hormone responsible for shoot formation is

1. Auxin

2. Ethylene

3. Cytokinin

4. Jasmonic acid

Q. ____________ identified and crystallized the cytokinesis promoting active substance called kinetin.

1. F.W.Went
2. Miller
3. E.Kurosawa
4. H.H.Cousins

Q. A leaf after being plucked from a plant can still remain green if it is dipped in _____________

1. Gibberellin
2. Cytokinin
3. Abscisic acid
4. Auxin

Q. Which of the following plant growth regulators should be used to delay senescence in plants?

1. Gibberellin and ethylene
2. Ethylene and cytokinin
3. Cytokinin and gibberellin
4. None of the above

Q.

Through their effects on plant growth regulators, what do the temperature and light control in the plants?

1. Flowering

2. Apical dominance

3. Fruit elongation

4. Closure of stomata

Q.

The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of:

1. Phenyl acetic acid

2. NAA, 2, 4­-D

3. IAA, IBA

4. Cytokinin

Q. Auxin inhibits the growth of

1. apical buds
2. lateral axillary buds
3. roots on stem cuttings
4. parthenocarpic development of fruits

Q. ____________ helps to overcome apical dominance.

1. IAA
2. Gibberellin
3. Cytokinin
4. Ethylene

Q. ____________ hormone helps in lateral shoot growth.

1. Abscisic acid
2. Cytokinin
3. Auxin
4. IAA

Q. Which of the following statements is /are correct about cytokinin?.
Statement 1: Cytokinin is a hormone whose main function is the induction of cell division and delay in senescence
Statement 2: Cytokinin is the process of cell division
Statement 3: Cytokinin helps in breaking seed dormancy.
Statement 4: Cytokinin helps to overcome apical dominance.

1. Only statement 1 is correct
2. Statements 3 and 4 are correct
3. Statements 1 and 4 are correct
4. Statements 2 and 3 are correct

Q.

Question 03:

The effect of apical dominance can be overcome by which of the following hormone?
(a) IAA
(b) Ethylene
(c) Gibberellin
(d) Cytokinin

Q.

Which of the following helped in the proliferation of callus in addition to auxins?

1. Extracts of vascular tissues

2. Carotenoid derivative

3. Terpenes

4. Indole compound.

Q. Richmond Lang effect is shown by:

1. Kinetin
2. Auxin
3. Gibberellin
4. Ethylene

Q. State the physiological effects of auxin. ​

Q. Delay in leaf senescence is caused by ________________

1. abscisic acid and ethylene
2. abscisic acid and cytokinin
3. gibberellin and cytokinin
4. cytokinin and ethylene

Q. Which of the following hormones primarily helps in cell division?

1. Cytokinin
2. Abscisic acid
3. Ethylene
4. Gibberellin

Q. Which one is not a physiological effect of auxin?

1. Promotes flowering
2. Promotes bolting
3. Prevents early fruit and leaf drop
4. Initiates rooting in stem cuttings

Q. Death of stem and root tips occur due to deficiency of :

1. Calcium
2. Nitrogen
3. Carbon
4. Phosphorus

Q.

Which hormone reverses apical dominance effects?

Q. Which of the following is antagonistic to auxin in controlling apical dominance?

1. Ethylene
2. Gibberellin
   
3. Cytokinin
4. Abscisic acid

Q. Which of the following statements is incorrect about cytokinin?

1. Helps in promoting cell division
2. It helps in improving the shape of fruits
3. They promote nutrient metabolism
4. They help to overcome apical dominance

Q.

Coconut milk factor is a/an ______.

1. A gibberellin

2. Abscisic acid

3. Cytokinin

4. An Auxin

Q.

How many of the following statement(s) is/are correct regarding cytokinins?
I. They act in association with other growth regulators.
II. They are also known as the true cell division factor.
III. They do not have any effect on mitotic division.
IV. They are used in tissue culture experiments.

1. One
2. Two
3. Four
4. Three

Q.

How does TDZ hormone dissolve?

Q.

What Is The Role Of Auxin Hormone?