How does a mutation in the gene for a protein affect the protein?

A gene has the base sequence that starts with: TAG CAT GGC AT. Read for more information!?

• http://www.google.com/imgres?imgurl=http://tigger.uic.edu/classes/phys/phys461/phys450/ANJUM02/codon_table.jpg&imgrefurl=http://tigger.uic.edu/classes/phys/phys461/phys450/ANJUM02/lecture_notes2_II.htm&usg=__SGiwa7uMGpriGqI1Qa6wSMIU8XU=&h=902&w=962&sz=89&hl=en&start=0&zoom=1&tbnid=591nQ9yzLMxx4M:&tbnh=100&tbnw=107&ei=pdM0TfCKNcrSgQe69cyQCw&prev=/images%3Fq%3Dmessenger%2Brna%2Bcodon%2Bchart%26um%3D1%26hl%3Den%26sa%3DN%26biw%3D1003%26bih%3D445%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=677&vpy=123&dur=2249&hovh=217&hovw=232&tx=122&ty=151&oei=pdM0TfCKNcrSgQe69cyQCw&esq=1&page=1&ndsp=12&ved=1t:429,r:4,s:0 Thats the chart ^^ A)What would be the mRNA base sequence formed during transcription, using the DNA sequence shown above? B)What would be first three amino acids in the protein formed from this gene/ C) The gene has a point mutation and is change to the sequence below TAG CTT GGC AT What kind of mutation is this? D) What is the new mRNA strand formed by this gene? E) What are the new amino acids formed from this gene? F) Describe how the mutation has affected the protein coded by this gene? Please someone help, i do online school. And none of the information they give me help . I been stuck on this project for a week in a half . help help help ill do anything

• Answer:

  A) AUGCCAUGCUA B)MET PRO CYS C) non sense D) MET PRO (and a stop but this does not induce an amino acid) E) CYS to STOP truncated protein. F) It's truncated i.e. shortened.