Who of the following is concerned with biochemical genetics

$A$ : Nutritional mutant strain of pink mould is auxotroph.
$R$ : It is not able to prepare its own metabolites from the raw materials obtained from outside

The haploid condition is found in

For every single amino acid incorporated in peptide chain$. . . . $ $ATP$ and $. . . . $ $GTP$ molecules are used.

The chromosomes as thread like structures in nucleus was first described by

Genetic codes are