Tag: plant hormones

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Questions Related to plant hormones

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

Cell division is initiated by

  1. Cytokinin

  2. Auxin

  3. Gibberellin

  4. ABA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The cytokinin hormones promote cell division and tissue growth, and depend upon the presence of auxins to determine the extent of their activity. When the ratio of cytokinins to auxins is relatively high, stem and leaf growth is stimulated. 

So the correct option is 'Cytokinin'.

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

6-(4-Hydroxy-3 Methyl-trans-2-butenylamine) purine is also called

  1. Methyl jasmonate

  2. Zeatin

  3. Brasinolide

  4. Triacontanol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A 6-(4-Hydroxy-3 Methyl-trans-2-butenylamine) purine is a chemical name of trans zeatin. It is a type of cytokinin, plant hormone. It was first found in Zea maize. It stimulates the cell division process in plants. It acts as plant growth regulator.

Thus, the correct answer is option B.

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

Natural hormone isolated from coconut milk and corn kernels is

  1. Florigen
  2. ${GA} _{3}$

  3. Auxins

  4. Zeatin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Zeatin is a type of cytokinin, a plant hormone. It stimulates cell division. It is present in coconut milk. It was first isolated from Zea maize (corn kernels). It stimulates growth in plants. 

Thus, the correct answer is option D.

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

Which one is growth regulator produced by plants?

  1. NAA

  2. Zeatin

  3. 2, 4-D

  4. BAP
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Naphthaleneacetic acid (NAA) is a type of synthetic auxin, plant hormone. It is a growth regulator. It acts as rooting agent. Zeatin a type of naturally occurring cytokinin, the plant hormone. It was first discovered in Zea maize. A 2, 4-D is a type of synthetic auxin, plant hormone. It acts as weedicide. BAP (Benzylaminopurine) is a type of synthetic cytokinin, a plant hormone. It is involved in various physiological processes of plants like cell division.

Thus, the correct answer is option B.

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

Cytokinins which have specific effect in cytokinesis are modified forms of

  1. Cytosine

  2. Adenine

  3. Guanine

  4. Thiamine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cytokinin is a plant hormone. It has the specific effect in cytokinesis in plants. It is modified form of adenine. Kinetin, zeatin, and 6-benzylaminopurine are adenine type cytokinins. It is adenine molecule that is modified by the addition of 5-carbon sidechains off the 6 position.

Thus, the correct answer is option B.

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

Plant hormones used for inducing morphogenesis in plant tissue culture is

  1. Gibberellins

  2. Ethylene

  3. Cytokinins

  4. ABA
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Morphogenesis is the process of development of shape of an organism. Cytokinins which is present at the site where rapid cell division occurs like root apices, developing shoot buds it helps in plant growth and attaining its shape. So it will help the plant to maintain its shape in tissue culture.

So the correct option is 'Cytokinins'.

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

State whether the following statements are true or false.
The plant ageing process, senescence, is prevented by cytokinins.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cytokinin is a plant growth hormone that is basic in nature and is responsible for cell division. This results in cell elongation, growth, and development of plants, they work similar to auxins. Cytokinins are helpful in delaying and stopping the senescence of leaves thus resulting in the process of aging to stop by the mobilization of nutrients in the required part of the plant.

So, the correct statement is 'True'.