一、选择题1.叶肉细胞和肌肉细胞内都具有的、而蓝藻细胞内不具有的结构是 (　 )。Ａ .线粒体和中心体　Ｂ .染色体和质体Ｃ .ＲＮＡ和叶绿体　　Ｄ .高尔基体和线粒体2 .放射自显影术是生物学研究中常用的手段 ,如果仅要求标记生长细胞中的蛋白质 ,而不致标记核酸 ,应运用的同 First, multiple-choice questions 1. Structures that are present in mesophyll cells and muscle cells but not in cyanobacterial cells (). A. Mitochondrion and centrosome B. Chromosome and plastid C. RNA and chloroplast D. Golgi apparatus and mitochondria 2. Autoradiography is a commonly used method in biological research. If only the proteins in the growing cells are required to be labeled, Marker nucleic acid, the same should be used