One gene-one enzyme hypothesis was postulated by:
(a) R. Franklin
(b) Hershey and Chase
(c) A. Garrod
(d) Beadle and Tatum
(d) 'One gene-one enzyme' hypothesis was given by Beadle and Tatum (1948) which states that particular gene controls the synthesis of specific enzyme. Later, it was modified to 'one gene-one polypeptide hypothesis by Yanofsky et.al. (1965).