Question

Griffith performed an experiment to prove the chemical nature of genetic material. In Griffith's experiment

• A. the protein coat from pathogenic cells was able to transform non-pathogenic cells.
• B. heat killed pathogenic cells caused pneumonia.
• C. some substance from pathogenic cells was transferred to non-pathogenic cells and causes transformation.
• D. the polysaccharide coat of bacteria caused Pneumonia.

Answer 1

Answer: (C)

Griffith in his experiment used a virulent or pathogenic strain and a non-virulent or non-pathogenic strain of bacteria Streptococcus pneumonia. He observed that some chemical substances from pathogenic strain of bacteria caused the transformation of non-pathogenic strain, but he could not explain the biochemical nature of transforming agents.