A strand of mRNA has the bases guanine-cytosine-uracil. Which amino acid
corresponds to these bases?
a. Crys
b. Arg
c. Alan
d. Ser

See answer below

Explanation:

Hi there,

c. Ala (Alanine)

To get started, use the codon chart. Notice, the mRNA strand has a specific order in which bases are added. In this case, Guanine-Ctyosine-Uracil corresponds with G-C-U.

To read the codon chart, start off in the first position, which is G (blue row in picture). Next, to locate a specific box, look at the second position, which is C (orange column), and the specific box is located. At this point, a phenomena known as "wobbling" can happen. Wobbling is when there is redundancy in codon sequences where the same amino acid can still be produced, regardless of the third base.

The last nucleotide is U, which locates G-C-U, or Alanine.

thanks,