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Operon is [Kerala PMT 2004]

A. A set of closely linked genes regulating a metabolic pathways in prokaryotes
B. The sequence of three nitrogen bases determining a single amino acid
C. The sequence of nitrogen bases in mRNA which codes for a single amino acid
D. A gene responsible for switching on or off other genes
E. A segment of DNA specifying one polypeptide chain in protein synthesis 
Answer» B. The sequence of three nitrogen bases determining a single amino acid


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