The DNA molecule takes a complete turn after every .................. base pairs.

The DNA of E. coli has ................. base pairs.

In a DNA molecule distance between two bases is

In DNA the complementary base pairs are_______.

The length of one complete turn of a DNA double helix is -

$ DNA helix to 20Å wide. One complete turn of DNA is 34Å long.

The base sequence in one of the strands of DNA is TAGCATGAT (i) Give the base sequence of its complementary strand. (ii) How are these base pairs held together in a DNA molecule? (iii) Explain the base complementarity rules. Name the scientist who framed this rule.