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Mutant strains of Saccharomyces cervevisiae in which endogenous DNA are deleted are called as _________

(a) rho0

(b) synthetic rho

(c) rho+

(d) rho-

I got this question in a national level competition.

Origin of the question is Organelle Transformation in chapter Using Other Organisms of Genetic Engineering

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Right answer is (a) rho0

To explain I would say: Mutant strains of Saccharomyces cervevisiae in which endogenous DNA are deleted are called as rho0. Synthetic rho- strains are produced when DNA is introduced into mitochondria and concatamers are produced.

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