question_answer

The development of the current idea that DNA is the genetic material was first demonstrated by Griffith in his famous experiment using smooth and rough strains of Pneumococci. DNA was then called as "transforming principle". Consider the

following experiment in this connection:

Steps:

(i) Pneumococci of smooth strains were first grown on culture media.

(ii) Cells were separated and lysed to collect cell free extract.                      '

(iii) "Transforming principle" was isolated from the extract and distributed into two test tubes.

(iv) To each test tube, crude enzyme preparation containing "depolymerase or deoxyribonuclease," was added.

(v) Only one test tube was heated to 65°C after adding the enzyme.

(vi) Relative viscosities of both the preparations were measured.

The expected results would be:

A)  

B)         

C)   

D)