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Plant Physiology Mock Test Series

Plant physiology multiple choice questions answer key

S.N.Name of quizTest number
(01).PGR MCQ: Plant Growth Regulators (Phytohormones)01
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(01). PGR MCQ: Plant Growth Regulators (Phytohormones)

Go to PGR MCQ: Plant Growth Regulators (Phytohormones)

This page includes multiple choice objective questions from the main subject plant physiology. We will update this page whenever a new post is available.

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PGR MCQ: Plant Growth Regulators (Phytohormones)

PGR: Plant Growth Regulators. It is also known as Plant Hormones. Auxin, cytokinin, gibberllin, etc., are growth hormones. ABA is a growth retardant hormone.

Avena Curvature Test: Avena Curvature Test or ACT is a bioassay. It is related to auxin. It measures the angle of curvature of a decapitated coleoptile.

2, 4-D: 2, 4-D belongs to auxin. It is used as a herbicide to kill broad-leaves weeds. It acts as plant growth regulator at low concentrations.

Apical dominance: In apical dominance, the growth of terminal portion is dominated by the plant growth regulator auxin.

Seed dormancy: Some seeds require dormancy for a certain period of time. Germination won’t take place during dormancy. Gibberllin is a strong and most used plant growth regulator to break the dormancy of seeds.

ABA: ABA or Abscisic acid is an anti plant growth regulator. It supress the growth and development of a plant. We can use it to develop a bonsai.