試題詳解

40. Novel amino acids can be inserted at certain stop codons. Which of the following descriptions is not correct?
(A) Rare amino acids are not one of the standard amino acid.
(B) Selenocysteine (Sec) is encoded by UGA, one of the stop codon.
(C) The choice between "stop" and Sec depends on the selenocysteine insertion sequence (SECIS clement).
(D) In bacteria, SECIS element forms a stem and loop just after the UGA.
(E) In mammals, SelB protein recognizes both tRNA-Sec and SECIS element. The Sec is delivered to the right place and then insetted as part of the growing polypeptide.