Oswald T. Avery, Colin M. MacLeod and Maclyn McCarty demonstrated that ……………

only DNA was able to transform harmless R-strain into virulent S-strain.

transformation of live S-strain bacteria into R-strain type was because of DNA of bacteria of S-strain.

the transforming substance was either a protein or RNA.

only DNA was able to transform harmless R-strain into virulent S-strain.

when DNA isolated from S-strain bacteria, was digested with DNase, the transformation occurred.

Histone octamer of nucleosome has two molecules, each of ……………….. proteins.

$ H_2 A, H_2 B, H_3 \, and \, H_4$

$ H_2 A, H_2 B, H_3 \, and \, H_1$

$H_2 A, H_2 B. H_3 A \, and \, H_3 B$

$ H_1 A, H_2 B, H_3 \, and \, H_4$

only DNA was able to transform harmless R-strain into virulent S-strain.

$ H_2 A, H_2 B, H_3 \, and \, H_4$

How many of the following characteristics are shown by the R-strain of Streptococcus pneumonia? Avirulent, Smooth, Pathogenic, Capsulated …………

Enzymes like ……………….. and DNA topoisomerase-I, play important role in maintaining super-coiled state in prokaryotic DNA.

A DNA molecule in which both strands have 14N is allowed to replicate in an environment containing $^{15}N$ . What will be the exact number of DNA molecules that contain the $^{14}N$ after three replications?

As the base sequence present on one strand of DNA decides the base sequence of other 8 strand, this strand is considered as …………