Assume that the occurrence of nitrogen bases in adjacent positions in a DNA strand is random. Identify the minimum number of nucleotides in a DNA strand where GAAT can occur once on the basis of probability?

What is the amino acid sequence in the polypeptide segment translated from the mRNA base sequence of 

AGU- UUU- UCC- GGG- UCG?

Identify the triplet codons which code for the amino acids serine and proline

$$\begin{gathered} \mathrm{I}. \mathrm{UCC} \\ \mathrm{II}. \mathrm{CCA} \\ \mathrm{III}. \mathrm{AAG} \\ \mathrm{IV}. \mathrm{GGG} \end{gathered}$$

The correct pair is: