$A$ gene is made up of

How many base pairs are present in each turn of the $DNA$ helix?

If the percentage of Adenine is $30\%$,then what would be the percentage of Guanine (in $\%$)?

The biologically active gene synthesized by Khorana in $1979$ from $E. coli$,which codes for $tRNA$ (tyrosine),consists of:

In the structure of $DNA$,a purine base of one nucleotide is linked to a pyrimidine base of the opposite nucleotide by which type of bond?

What is the length of a $DNA$ molecule consisting of three turns?