12 Jun UC Irvine BIOLOGY 99 – Which of the following is
Question
1. Which of the following is NOT true about Eukaryotic Translation initiation?
a. An ATPase, elF4G binds directly to the poly(A) tail
b. 43S complex scans along the mRNA to find the start codon
c. Hydrolysis of elF2-GTP causes this protein to disassociate from the 40s subunit
d. elF1 binds to the E site on the 40S subunit
e. All of the above are true
2. Which of the following is NOT a means by which mRNA degradation is affected?
a. The binding of proteins to rRNA, which triggers mRNA degradation
b. mRNA can create a hairpin structure preventing degradation
c. mRNA AU-rich elements (AREs) can bind factors that can change the rate at which the mRNA is degraded
d. Non-stop decay pathway
e. All of the above are means by which mRNA degradation is affected
3. Which of the following is a way that translational efficiency is controlled in some mRNA?
a. The 3’UTR maternal mRNA
b. Binding of PUF family proteins to certain mRNA
c. LTR sequences help the RNA to bind protein factors to allow translation to occur more efficiency
d. Two of the above are ways efficiency is controlled in some mRNA
e. All of the above are ways efficiency is controlled in some mRNA
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