18. What region of gene does not appear in mRNA? (A) exons (B) introns (C) CDS (D) 5'-UTR

18. What region of gene does not appear in mRNA?
(A) exons
(B) introns
(C) CDS
(D) 5'-UTR

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1. 題目解析這道題目考查的是在基因轉...

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5.Why does a DNA strand grow only in the 5' to 3' direction? (A)because DNA polymerase can only add nucleotides to the 3' end of the growing molecule. (B)because DNA polymerase can only add nucleotides to the 5' end of the growing molecule. (C)because the DNA molecule only unwinds in the 5' to 3' direction. (D)because DNA polymerase requires the addition of a starter nucleotide at the 5' end.

18. What region of gene does not appear in mRNA?
(A) exons
(B) introns
(C) CDS
(D) 5'-UTR

詳解 (共 1 筆)

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