Microbiology Which of the following is not true about Corynebacterium diphtheria? A Deep invasion is not seen B Elek's test is done for toxigenicity C Metachromatic granules are seen D Toxigenicity is mediated by chromosomal change 💡 Explanation Which of the following is not true about Corynebacterium diphtheria? ✓ Correct Answer: D. Toxigenicity is mediated by chromosomal change