几个判断题，大家来帮助一下吧。。。。

1.the term secondary structure of protein refers to as overall conformations。
2.the prokaryotes cell has no subcellular organelle。

3.the common feature of enzyme cascade system is feedback inhibition。

1.the term secondary structure of protein refers to as overall conformations。
错！这是三级结构。
2.the prokaryotes cell has no subcellular organelle。
对
3.the common feature of enzyme cascade system is feedback inhibition。
错。这只是酶系统的一种特征，很难说是普遍特征。