A21. Two single-base substitutions in the trpA gene of E.coli both affected amino acid number 234. In one mutant, the amino acid at this position was now Cys; in the other mutant it was Asp. What was the most likely amino acid encoded at position 234 in the wild type protein? E. Pro A. Val B. Trp D. Arg C. Gly

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Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.