A mutant strain of T4-bacteriophage, R-II, fails to lyse the E. coli but when two strains R-IIX and R-IIY are mixed then they lyse the E. coli. What may be the possible reason?
- ABacteriophage transforms in wild.
- BIt is not mutated.
- CBoth strains have similar cistrons.
- DBoth strains have different cistrons.
✓ Correct answer: D
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