Study Guide 4 Question 6

Question 1

Use the table above to determine which of the 20 amino acids fall into the category

-Which amino acids are coded for by only one codon?

Answer 1

Methionine (AUG) and Tryptophan (UGG)

Question 2

Use the table above to determine which of the 20 amino acids fall into the category

-Which amino acids have wobble pairings in the third codon position?

Answer 2

Phenylalanine, Leucine, Isoleucine, Valine, Serine, Proline, Threonine, Alanine, Tyrosine, Stop, Histidine, Glutamine, Asparagine, Lysine, Aspartic acid, Glutamic acid, Cysteine, Arginine, and Glycine

Question 3

Use the table above to determine which of the 20 amino acids fall into the category

-Which amino acids have wobble pairings in the second codon position?

Answer 3

Stop, and Serine (if coupled with wobble in the first position)

Question 4

Use the table above to determine which of the 20 amino acids fall into the category

-Which amino acids have wobble pairings in the first codon position?

Answer 4

Arginine, Leucine, and Serine (if coupled with wobble in the second position)

Question 5

Use the table above to determine which of the 20 amino acids fall into the category

-Which amino acid could have substitution mutations in all three positions of the codon and still produce the same amino acid?

Answer 5

Serine (though wobble in the first and second positions have to occur together)

Question 6

Use the table above to determine which of the 20 amino acids fall into the category

-It is hypothesized that wobble evolved in order to protect the DNA from harmful effects of mutations. If that hypothesis is correct, which codon position (1st, 2nd, 3rd) would you predict has the highest rate of mutation?

Answer 6

If correct, the third position likely has the most mutations due to wobble protection. It indeed has more mutations than the first or second positions.