Q. Assertion: On a culture plate, pneumococcus bacteria produce rough colonies only. Reason: Shiny (S) strain of pneumococcus bacteria is an inactive strain.
A) Both assertion and reason are true and reason is the correct explanation of assertion.
B) Both assertion and reason are true but reason is not correct explanation of assertion.
C) Assertion is true, but reason is false.
D) Both assertion and reason are false.
Explanation
On a culture plate, pneumococcus bacteria produce two type of colonies namely shiny (s) colonies and rough (R) colonies. The only difference between these two colonies is the presence of polysaccharide coat on the former strain. Both R and S strain of pneumococcus are active strains.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.