One gene-one enzyme relationship was established for the first time in

1. A. Salmonella typhimurium
2. B. Escherichia coli
3. C. Diplococcus pneumoniae
4. D. Neurospora crassa.

Attempt this NEET 2007 Biology question free — pick an option to reveal the correct answer and a step-by-step explanation. Then join NEET Mastery Quest to practise 15,000+ PYQ and 2027-syllabus questions.