問題詳情
32. Telomerase is an enzyme can solve the problem of replication at the ends of linear chromosomes. How does it work?
(A) Repetitive sections of DNA can range from a single nucleotide to hundreds of nucleotides. Three nucleotides ofsmaller is a microsatellite.
(B) It adds 5' cap and 3’ polyA on chromosome that resists degradation by nucleases.
(C) It works like regular DNA polymerase (3'-5') except does not need DNA template strand to direct synthesis. Usesintrinsic RNA strand to synthesize GGGTTA sequence.
(D) It causes specific double-strand DNA breaks and rejoins the blunt ends on both strands.
(E) It adds numerous methylated GC pairs which resist hydrolysis and maintain chromosome integrity.
(A) Repetitive sections of DNA can range from a single nucleotide to hundreds of nucleotides. Three nucleotides ofsmaller is a microsatellite.
(B) It adds 5' cap and 3’ polyA on chromosome that resists degradation by nucleases.
(C) It works like regular DNA polymerase (3'-5') except does not need DNA template strand to direct synthesis. Usesintrinsic RNA strand to synthesize GGGTTA sequence.
(D) It causes specific double-strand DNA breaks and rejoins the blunt ends on both strands.
(E) It adds numerous methylated GC pairs which resist hydrolysis and maintain chromosome integrity.
參考答案
答案：C
難度：適中0.481481
統計：A(2),B(4),C(13),D(2),E(3)
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