问题
问答题
溶源性
答案
参考答案:入噬菌体在大肠杆菌体内可以呈环形分子存在于细胞质中,也可通过整合酶的作用而整合到寄主染色体上成为原噬菌体状态,并与寄主染色体一起复制。这种状态能维持许多代,这种现象称为溶源性。
溶源性
参考答案:入噬菌体在大肠杆菌体内可以呈环形分子存在于细胞质中,也可通过整合酶的作用而整合到寄主染色体上成为原噬菌体状态,并与寄主染色体一起复制。这种状态能维持许多代,这种现象称为溶源性。
完成对话。 | |
Jenny: So, Betty, what does your father do? Betty: 1 Jenny: Do you want to be a policewoman? Betty: Oh, yes. 2 but it’s also an exciting job. Jenny, your father is a bank clerk, right? Jenny: 3 Sam: Do you want to be a bank clerk, too? Jenny: No, not really. I want to be a reporter. Sam: Oh, yeah? Why? Jenny: It’s very busy, but it’s also fun, too. You meet so many interesting people. 4 What does he do? Sam: He’s a report at the TV studio. It’s an exciting job, but it’s also very difficult. 5 I want to be reporter, too. | |
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