This flashcard is about the lac operon: the 'i' gene codes for the inhibitor, the 'z' gene codes for beta-galactosidase (which hydrolyzes lactose into glucose and galactose), the 'y' gene codes for permease (improving cell permeability to beta-galactosidase), and the 'a' gene codes for transacetylase.
此闪卡关于乳糖操纵子：i基因编码阻遏蛋白，z基因编码β-半乳糖苷酶（水解乳糖为葡萄糖和半乳糖），y基因编码通透酶（增加细胞对β-半乳糖苷的通透性），a基因编码乙酰转移酶。
| Subject | lac operon |
|---|---|
| Q1 | i gene |
| Q1 Answer | codes for inhibitor |
| Q2 | z gene |
| Q2 Answer | beta galactosidase hydrolyses disaccharide lactose into glucose and galactose |
| Q3 | y gene |
| Q3 Answer | permease, improves cell permeability of cell to \(\beta\)-gal |
| Q4 | a gene |
| Q4 Answer | transacetylase |
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