20.Regarding to the techniques used in molecular biology, which statements is/are CORRE CT?
(A) Chromatin-immunoprecipitation can be used to detect DNA-protein interactions.
(B) Chromatin-immunoprecipitation are often used to detect interactions between DNA sequences.
(C) Chromatin-immunoprecipitation are often used to detect protein-protein interactions.
(D) Immunoprecipitation is often used to detect protein-protein interactions.
(E) Transgenic mice can be obtained by injecting recipient blastocysts with embryonic stem cells that carrytransfected DNA.