Elongation of the RNA polynucleotide chain always takes place:

Read the following statement with respect to the structure of DNA, and state true (T) or false (F).

A. It is made up of two polynucleotide chains that have antiparallel polarity.
B. The two chains are coiled in a right-handed fashion.
C. A phosphate group is linked to 5'–OH of the same nucleoside by glycoside linkage for the formation of sugar-phosphate backbone.
D. All four deoxyribonucleotides are always equally present in both strands.

A DNA double helix is $340 \mathrm{nm}$ long. The number of nucleotides in this DNA is:

Splicing is one of the important steps of post–transcriptional modification of __A__, which occurs in __B__.