Question

, , v Question Completion Sta QUESTION 9 For each of the following amino acid changes determine how a mutation in a single base of the mRNA codon (first, second or third nucleotide position) could be altered for the amino acid change to result. Match each change with the position in which the mutation must occur A. 2 B. 1 C. 3 Leu >GIn Phe..>lle ile > Asn AsLys Pro >Ala Phe>Ser 1.5 points Save Answer Click Save and Submit to save and submit. Click Save All Ansuwers to save all answers Save and Subm 0

Answer 1

1. Leucine is coded by CUU, CUC, CUA and CUG whereas Glutamine is coded by CAA and CAG .As we can see mutation at second position cause glutamine( CUA to CAA and CUG to CAG) formation . The answer is A.

2.Phenylalanine is coded by UUU and UUC whereas isoleucine is coded by AUU, AUCand AUA . As we can see mutation at first position cause isolecucine formation(UUU to AUU and UUC to AUC ). The answer is B.

3. Isoleucine is coded by AUU , AUC and AUA and Asparagine by AAU and AAC. As we can see mutation at second position cause asparagine formation. The answer is A.

4 . Asparagine is coded by AAU and AAC whereas Lysine is coded by AAA and AAG .As we can see mutation at third position cause lysine formation. The answer is C.

5. Proline is coded by CCU, CCC,CCA and CCG whereas Alanine is coded by GCU, GCC ,GCA and GCG .As we can see mutation at first position cause alanine formation. The answer is B .

6. Phenylalanine is coded by UUU and UUC whereas serine is coded by AGU and AGC. Here mutation is at first and second position. The answer is A and B.