試題詳解

14. The functions of translation initiation factor IF3 in bacteria. Which of the following descriptions is not correct?
(A) IF3 binds to free 50S subunits.
(B) IF3 prevents the 30S subunit from associating with 50S subunit. As an anti- association factor that causes a 30S subunit to remain in the pool of free subunits.
(C) IF3 controls the ability of 30S subunits to bind to mRNA.30S must have IF3 to form initiation complexes with mRNA.
(D) IF3 must be released from the 30S-mRNA complex in order for the 50S to join.
(E) IF3 checks the accuracy of recognition of the first aminoacyl-tRNA and helps to direct it to the P site of the 30S subunit.