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operon lac是什么意思 operon lac的读音、翻译、用法

‘operon lac’是英语,中文翻译为“乳糖操纵子”,是一种存在于细菌基因组中的遗传元件,参与细菌对乳糖的利用。它由三个主要部分组成:结构基因(编码乳糖酶等酶),调节基因(编码转录因子),以及操作员(启动子区和操作区)。

例句:

1. The operon lac is regulated by the lac repressor protein. (乳糖操纵子受乳糖抑制蛋白的调节。)

2. The lac operon is an example of an inducible system. (乳糖操纵子是可诱导系统的一个例子。)

3. Mutations in the operator region can affect the expression of the lac operon. (操作员区域的突变可以影响乳糖操纵子的表达。)

4. The lac operon is only expressed when glucose levels are low. (只有在葡萄糖水平低时,乳糖操纵子才会被表达。)

5. The lac operon is subject to both positive and negative regulation. (乳糖操纵子同时受到正向和负向调节。)

6. The lacZ gene is the first gene in the lac operon. (lacZ基因是乳糖操纵子中的第一个基因。)

7. The lac operon is involved in the bacterial metabolism of lactose. (乳糖操纵子参与细菌对乳糖的代谢。)

8. The lac operon is also known as the lactose operon. (乳糖操纵子也被称为乳糖操纵子。)

9. The lac operon is commonly used as a model system in molecular biology research. (乳糖操纵子常被作为分子生物学研究的模型系统使用。)