Tag: plant hormones
Questions Related to plant hormones
Cell division is initiated by
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Cytokinin
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Auxin
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Gibberellin
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ABA
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.
The name zeatin was coined by
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Skoog
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Miller
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Letham
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Melvin
Zeatin is a natural cytokinin first isolated from maize. It is an adenine derivative. The name zeatin was coined by Letham. It stimulates cell division or cytokinesis in plants.
Kinetin is
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Indolebutyric acid
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Indole acetic acid
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Butyric acid
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6-furfuryl amino-purine
Kinetin is a type of cytokinin, a plant hormone. It is involved in cell division. Chemically it is 6-furfuryl amino-purine. It stimulates growth and development in plant.
6-(4-Hydroxy-3 Methyl-trans-2-butenylamine) purine is also called
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Methyl jasmonate
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Zeatin
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Brasinolide
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Triacontanol
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.
Natural hormone isolated from coconut milk and corn kernels is
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Florigen
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${GA} _{3}$
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Auxins
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Zeatin
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.
Cytokinin is not found in
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Root apex
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Shoot apex
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Young fruits
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Mature fruits
Cytokinin is a plant hormone that promotes cell division in root apex, shoot apex and young fruits. It is also involved in apical dominance and leaf senescence. They are not found in mature fruits.
Which one is growth regulator produced by plants?
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NAA
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Zeatin
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2, 4-D
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BAP
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.
Cytokinins which have specific effect in cytokinesis are modified forms of
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Cytosine
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Adenine
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Guanine
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Thiamine
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.
Plant hormones used for inducing morphogenesis in plant tissue culture is
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Gibberellins
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Ethylene
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Cytokinins
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ABA
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.
State whether the following statements are true or false.
The plant ageing process, senescence, is prevented by cytokinins.
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True
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False
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.