Using the enclosed table of messenger RNA codons, select the NUMBER of CORRECT statements about the following sequence of RNA bases: AUG AAG AAA GGU UGA CAC UCU (i) It is a normal polypeptide since it starts off with a methionine. (II) The polypeptide is six amino acids long. (III) The sequence of amino acids could be altered by a point mutation in the third codon, AAA, to AAG. (IV) The sequence of amino acids shown above would constitute a large polypeptide. (v) The polypeptide includes a molecule of lysine.The number of correct statements above is:
A. 1 B. 2 C. 3 D. 4 E. You have to look this up and figure out what the answer is!
You have to look this up and figure out what the answer is!
I) is true. ii) find the stop codon, then count how many amino acids would be made.
iii) Consult the code. If the mutation is silent (does not change the resulting amino acid), no change in the sequence will occur.
iv) false - this is a very short sequence, but most polypeptides are hundreds of amino acids long.
v) consult the code to figure out which amino acids will result.