試題詳解

62. Which of the following statements about the lysogenic cycle of lambda (λ) phage is incorrect?
(A) After infection the viral genes immediately turn the host cell into a lambda-producing factory, and the host cell then lyses.
(B) Most of the prophage genes are silenced by the product of a particular prophage gene.
(C) The phage genome replicates along with the host genome.
(D) Certain environmental triggers can cause the phage to exit the host genome, switching from the lysogenic to the lytic cycle.
(E) The phage DNA is incorporated by genetic recombination (crossing over) into a specific site on the host cell's DNA.