The answer is most likely B). 'The harmless bacteria would not have been transformed, and the mice would have lived,' because, then bacterium transform, they use the genetic material present in their environment to do so, and when Avery destroyed the nucleotide bases(Genetic material) with an enzyme he destroyed any chances that the bacteria would have had at transforming into the virulent strain.
C. protein. Nitrogen is a component of amino acids which are the building blocks of protein.
Tissue Pain receptors that are sensitive to tissue damage or distortion of tissue.