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DAILY FREE MCQ CHALLENGE for Pre-Medical Entrance Preparation
Question
Which one of the following acids is a derivative of carotenoids?
A. Indole-3-acetic acid
B. Gibberellic acid
C. Abscisic acid
D. Indole butyric acid
NOTEImportant Question from AIPMT
See Answer Here
C. Abscisic acid
See Explanation Here
The plant growth regulators (PGRs) are small, simple molecules of diverse chemical composition. They could be indole compounds (indole-3-acetic acid, IAA); adenine derivatives (N6-furfurylamino purine, kinetin), derivatives of carotenoids (abscisic acid, ABA); terpenes (gibberellic acid, GA3) or gases (ethylene, C2H4). Plant growth regulators are variously described as plant growth substances, plant hormones or phytohormones in literature.
References
NCERT Biology Text, Class: XI, Unit IV: Plant Physiology, Chapter 15: Plant Growth and Development, Page no: 247.
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