Cytokinins

Q.

Who Discovered Auxin

Q. Plants have a nervous system.

1. True
2. False

Q.

What causes a green plant to bend towards light as it grows?

Q.

Which of the following is the first growth hormine to be discovered in plants?

1. Insulin

2. Auxin

3. Cytokinins

4. Gibberellins

Q.

Mark the odd one out:

1. Cytokinin

2. Auxin

3. Abscisic acid

4. Gibberellins

Q.

The growth regulator that retards ageing of plant organs is:

1. Abscisic acid

2. Auxin

3. Gibberellin

4. Cytokinin

Q.

Which of the following hastens the ripening of fruits?

1. Auxins

2. Ethylene

3. Gibberellins

4. Cytokinins

Q.

How does cytokinin affect cell division?

Q.

Cytokinin was discovered by

1. R. Gane

2. F. W. Went

3. Bayliss and Starling

4. Skoog and Miller

Q.

How do you activate B cells?

Q.

P is present in fruits and seeds as it promotes Q. Y is responsible for wilting of leaves as it Z growth.
Identify P, Q, Y and Z.

1. P - Auxin, Q - growth, Y - Gibberellin, Z - promotes

2. P - Gibberellin, Q - growth, Y - Cytokinin, Z - inhibits

3. P - Cytokinin, Q - cell division, Y - Abscisic acid, Z - inhibits

4. P - Abscisic acid, Q - cell division, Y - Cytokinin, Z - inhibits

Q. Which of the following enhances or induces fusion of protoplasts?

1. IAA and gibberellins
2. Sodium chloride and potassium chloride
3. Polyethylene glycol and sodium nitrate
4. IAA and kinetin

Q.

Cytokinins are produced in root tips and transported to all parts of the plant through _______ cells.

1. phloem

2. sieve tube

3. companion

4. xylem

Q.

Cytokinins are found in ___

1. Germinating seed

2. Stem

3. Embryo

4. Xylem

Q.

Where is cytokinin found?

Q.

Give two examples of phytohormones.

Q.

A plant hormone used for introducing morphogeneis in plant tissue culture is ???

Q. The conducting tissues of the plant are

1. Xylem
2. Phloem
3. Sclerenchyma
4. Both xylem and phloem

Q. P is present in developing fruits and seeds and it promotes cell division. Y is responsible for wilting of leaves as it inhibits growth.
Identify P and Y.

a) P - Auxin, Y - Gibberellin
b) P - Gibberellin, Y - Cytokinin
c) P - Cytokinin, Y - Abscisic acid
d) P - Abscisic acid, Y - Cytokinin

Q.

Cytokinins are found in ___

1. Germinating seed

2. Stem

3. Embryo

4. Xylem

Q.

Cytokinins are produced in root tips and are transported through _____ cells.

1. xylem

2. phloem

3. veins

4. sieve tube

Q. Translocation takes place using energy in the form of

1. ATP
2. NADPH
3. FADH
4. Glucose

Q.

Which of the following is a plant hormone?

1. Insulin

2. Thyroxin

3. Cytokinin

4. Estrogen

Q.

The growth regulator that retards ageing of plant organs is___ .

Q.

Leaf aging is increased by which of the plant hormone?

1. Cytokinin

2. Abscisic Acid

3. Gibberellin

4. Auxin

Q.

A growth regulator concerned with stimulation of cell division and nucleic acid metabolism is cytokinin.

1. False

2. True

Q. Very short answer type.
Which was the first plant hormone discovered, and who named it and in which year?

Q.

Cytokinins are known to

1. Help in retention of chlorophyll

2. Promote formation of abscission layer

3. Inhibit cytoplasmic movement

4. Influence water transport

Q.

Name the plant hormone and mention their functions

Q. Water and minerals travels upwards through _________

1. Both A and B
2. None of these
3. Xylem
4. Pholem