Once incorporated into the plant genome, the gene product, CP4 EPSP synthase, confers crop resistance to

Correct option is C

✅ (c) glyphosate
· CP4 EPSP synthase gene is derived from Agrobacterium sp. strain CP4.
· Confers glyphosate resistance to genetically modified crops like soybean, maize, and cotton.
· Glyphosate inhibits EPSP synthase in susceptible plants, blocking aromatic amino acid synthesis.
· Transgenic crops expressing CP4 EPSP synthase can tolerate glyphosate application.
❌ (a) atrazine
· Atrazine is a herbicide targeting photosystem II, not affected by EPSP synthase.
· Resistance to atrazine is conferred through other genetic modifications, not CP4 EPSP synthase.
❌ (b) thifensulfuron
· Thifensulfuron is a sulfonylurea herbicide inhibiting acetolactate synthase (ALS), not EPSP synthase.
· CP4 EPSP synthase does not confer resistance to thifensulfuron.
❌ (d) 2,4-D
· 2,4-D is a synthetic auxin herbicide, not targeting EPSP synthase.
· Different genetic modifications are needed for 2,4-D resistance.