What was the difference between the S strain and R strain bacteria in Griffith's experiments?

What was the difference between the S strain and R strain bacteria in Griffith's experiments?
  1. S strain bacteria were virulent while R strain bacteria were non-virulent.
  2. S strain bacteria were heat-resistant while R strain bacteria were heat-sensitive.
  3. S strain bacteria produced smooth colonies while R strain bacteria produced rough colonies.
  4. S strain bacteria were antibiotic-resistant while R strain bacteria were antibiotic-sensitive.

Solution

S strain bacteria produced smooth shiny colonies while the R strain bacteria produced rough colonies.

Asked in: NCERT

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