In regards to the mRNA sequence shown in the first question, suppose a mutation occurred at position $11$ that changed the cytosine to an adenine. What effect would this have on the translated protein?

The protein would be shorter.

It would constitute a nonsynonymous substitution.

It would alter the reading frame.

It would not affect the sequence of the translated protein.

Shown below is a portion of a eukaryotic mRNA that encodes a protein. The sequence is continuous and is shown in $10-$nucleotide chunks to make it easier to visualize. The numbers on the left indicate the relative locations of nucleotides in the sequence, starting with position $1$ at the $5\text{'}$ end of the mRNA strand. The gene that encodes this protein contains introns, but they have already been completely spliced from this transcript. The stop codon is shown in bold and underlined.

$```$

cgucucuccu cgcuaagaau cccucaguua aacaagaacu gcaugggacu

ugcaggucug ccggcuuccu gccugaggag ugcaaaggac augaaacauc

ggcugggguu ccugcugcag aagucagauu ccugcgaaca caguucuuca

cacagcaaga aggacaaagu aguaacuugc cagaggguaa gccaagaaga

agucaagaaa ugggcugaau cgunggaaaa ccugauncac caugaaugug

gacuggcagc uuucaaagcu uuccugaagu cggaauacag cgaggagaac

aungacuucu ggaucagcug cgaggaguac aagaagauca agucaccuuc

uaaacuaagu cccaaagcca agaagaucua caacgaguuc aucucagugc

aagcaacaaa agaggugaac cuggacucuu gcaccagaga ggagacaagc

cggaacaugu uacagcccac aauaaccugu uuugaugaag cccagaagaa

gauuuucaac cugauggaaa aggauuccua ccgccgcuuc cucaagucuc

gauncuaucu ugaccugacc aauccuucca gcugcggggc agagaagcag

aaaggagcca agaguucugc agacugcacu ucccuggucu cccagugugc

cuaauucuca cacagaggca gggagcccaa augccaagac ucuaugcucu

gaaaaaccug aggccaaaua ungaucuuaa gcaccaaugc uuuauccaca

unguagccua guguccaugc ugccugccgc gugugaguca cuuccaugua

aaacuagccu uaguuguggu guugggguuu ucacuagggu aagacccaau

uuguuuuaaa uuuucccaag ucuccuuaag

$```$