In the sea urchin, the rate of protein synthesis in eggs that have not been fertilized is low. Why might this be the case?
1) Because the mRNAs in unfertilized sea urchin eggs contain a shorter poly(A) tail than fertilized eggs
2) Because the mRNAs in unfertilized sea urchin eggs have incorporated more adenine nucleotides at the 3' end than fertilized eggs
3) Because the mRNAs in unfertilized sea urchin eggs are longer than the mRNAs of fertilized eggs
4) Because the mRNAs in unfertilized sea urchin eggs have a different 3' untranslated region (UTR) than fertilized eggs