in PYTHON

4. Strings. Consider the following string corresponding to a (3'-to-5') DNA sequence on the "antisense" strand, i.e., the strand that is used as a template for transcription: dna-seq = 'a atgccgtgott! (a) (2 points) Write an expression that gives the number of characters in dna seq. (b) (2 points) Write an expression that gives the substring 'gcc' from dna.seq. (c) (2 points) Write an expression that gives the reversed sequence (backwards reading of dna seq). 3 points) Is this reversed sequence identical to the mRNA sequence made from this DNA? If not what is different? d) (3 points) Is this reversed sequence identical to the mRNA sequence made from this DNA? If not what is different? (e) (3 points) Write the sequence of the first mRNA codon, (5-to-3'). (f) (4 points) Write a statement that evaluates to True, if and only if the string stored in variable s contains the character 'U