複選題26. Which ones of the following descriptions about RNA editing are correct? (A) trypanosome kinetoplast RNA editing occurs in both 3' 5'and 5'3' directions (B) mRNA must be edited before being translated (C) Both ADAR and CDAR could mediate nucleotide deamination (D) All 4 ribonucleotides (A, U, C, G) in RNA could be edited (E) one or more gRNAs to hybridize the edited region.

複選題

26. Which ones of the following descriptions about RNA editing are correct?
(A) trypanosome kinetoplast RNA editing occurs in both 3' 5'and 5'3' directions
(B) mRNA must be edited before being translated
(C) Both ADAR and CDAR could mediate nucleotide deamination
(D) All 4 ribonucleotides (A, U, C, G) in RNA could be edited
(E) one or more gRNAs to hybridize the edited region.

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複選題5. Which of the following statements about transposon are correct? (A) Transposon is a DNA sequence that can irreversibly change its position within a genome. (B) Transposition often results in duplication of the same genetic material. (C) The reverse transcription step of retrotransposon is catalyzed by a reverse transcriptase, which is often encoded by the transposon itself. (D) Dissociation elements (Ds) is an example of an autonomous transposon, and activator element (Ac) is an example of a non-autonomous transposon. Without Ds, Ac is not able to transpose. (E) Transposition of Ds was sometimes accompanied by major chromosomal rearrangements including deletions, duplications, inversions, reciprocal translocations.

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