EVERYDAY SCIENCE

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Abscisic acid (ABA) is chemically ____
A
Pyrrole compound
B
Amino acid compound
C
Sesquiterpene 15C
D
Nucleotide compound
Explanation: 

Detailed explanation-1: -Abscisic acid is a 15-C sesquiterpene compound (molecular formula C15H12O4) composed of three isoprene residues and having a cyclohexane ring with keto and one hydroxyl group and a side chain with a terminal carboxylic group in its structure.

Detailed explanation-2: -Abscisic acid (ABA) is a plant hormone with diverse roles in disease resistance, plant development, and response to stresses (water, salt, temperature, and pathogens). 17830, 17831, 17832 It is also produced by some plant pathogenic fungi.

Detailed explanation-3: -Abscisic acid (ABA) is a key hormone involved in tuning responses to several abiotic stresses and also has remarkable impacts on plant defense against various pathogens. The roles of ABA in plant defense against bacteria and fungi are multifaceted, inducing or reducing defense responses depending on its time of action.

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