49. Which of the following is a TRUE statement about virus
(A) all viruses have capsid and membrane envelope
(B) only retrovirus can reversely transcribe RNA to DNA
(C) RNA viruses can serve as a template for DNA synthesis
(D) only bacteriophages have lysogenic cycle
(E) virulent phage breaks open host cell wall for phage assembly

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統計： A(0), B(25), C(11), D(0), E(5) #2973628