Which of the following is considered a 'living chemical'?

Identify the correct features of $DNA$ from the following statements:
$(i)$ It is made of two polynucleotide chains.
(ii) The backbone is constituted by sugar and phosphate.
(iii) The two chains have anti-parallel polarity.
(iv) The bases in the two strands are linked through $H$-bonds.
$(v)$ Both chains are coiled in a right-handed fashion.

Which structure contains the coded information required to produce the chemicals necessary for performing parental functions?

The diameter of each nucleosome is about:

The double-helical structure of $DNA$ was proposed by:

Which of the following is capable of self-replication?