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Bacteriology › View

Which of the following is absent in gram negative bacteria?

A. Lipid A

B. Lipoteichoic acid

C. Lipopolysaccharides

D. Porins

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Genetics › View

Which term is used to describe a natural change in the sequence of an organism’s DNA?

A. Adaptation

B. Alteration

C. Modification

D. Mutation

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