题目内容

The audio file format is decided when you record the sound.

A. 对
B. 错

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The audio file format is sure to be MP3 when created by Cool Edit.

A. 对
B. 错

When you finish editing and want to save the file, you should decide the sound file format.

A. 对
B. 错

基因表达调控的基本调控方式是?

A. 基因结构修饰
B. 转录起始
C. 转录后加工
D. 蛋白质翻译及加工

lac阻遏蛋白结合在乳糖操纵子的什么位置?

A. P序列
B. O序列
C. I基因
D. Z基因

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