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Match the herbicides in Group I with the target enzymesin Group II.
Group–I Group–II P. Glyphosate 1. Nitrilase Q. Bromoxynil 2. Acetolactatesyn thetase R. Sulphonylureas 3. Dehalogenase S. Dalapon 4. 5-Enolpyruvylshikimate 3-phosphate synthase
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- P-4, Q-1, R-2, S-3
- P-2, Q-1, R-4, S-3
- P-4, Q-3, R-2, S-1
- P-3, Q-2, R-4, S-1
Correct Option: A
Glyphosate kills plants by interfering with the synthesis of the aromatic amino acids phenylalanine, tyrosine and tryptophan. It does this by inhibiting the enzyme 5-enolpyruvyl-shikimate-3-phosphate synthase (EPSPS), which catalyzes the reaction of shikimate-3-phosphate (S3P) and phosphoenolpyruvate to form 5-enolpyruvyl-shikimate-3-phosphate (ESP). Bromoxynil is a nitrile herbicide and one of its common degradation products (3, 5-dibromo-4-hydroxybenzoic acid) have been shown to undergo metabolic reductive dehalogenation by the microorganism. Sulfonylureas is used as Chlorimuron (Classic) for soybeans. Their site of action is Acetolactate synthase (ALS) enzyme. Dalapon is a synthetic herbicide and plant growth regulator. It is responsible for inhibition of lipid synthesis by acting on dehalogenase enzyme.
