9. The Ds transposable element of maize cannot transpose on its own because it lacks (A) Tn3. (B) inverted repeats. (C) origin of replication. (D) direct repeats. (E) transposase.

9. The Ds transposable element of maize cannot transpose on its own because it lacks
(A) Tn3.
(B) inverted repeats.
(C) origin of replication.
(D) direct repeats.
(E) transposase.

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1. 題目解析本題詢問的是玉米（ma...

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複選題2. Which of the following descriptions about infection of E. coli by phage λ is correct? (A) CII protects CIII against cellular proteases and thus is important for lytic cycle induction during a infection. (B) Q is an antiterminator that permits RNA polymerase to ignore the terminators at the ends of the immediate early genes and continue transcribing into the delayed early genes. (C) The cro gene is stimulated during the lytic cycle of infection. (D) N is an antiterminator which permits transcription of the late genes during the lytic cycle of infection (E) Without Q, transcription from the late promoter PR stops after 194 bp.

9. The Ds transposable element of maize cannot transpose on its own because it lacks
(A) Tn3.
(B) inverted repeats.
(C) origin of replication.
(D) direct repeats.
(E) transposase.

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