-
什么是肽键、蛋白质的一级结构？
-
蛋白质的一级结构及高级结构决定于：（）
A、分子中氢键
B、氨基酸的组成及顺序
C、分子中盐键
D、分子内部疏水键
E、氨基酸残基的性质
-
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) Which three statements insert a row into the table? （）
A . INSERT INTO employees VALUES ( NULL, 'John', 'Smith');
B . INSERT INTO employees( first_name, last_name) VALUES( 'John', 'Smith');
C . INSERT INTO employees VALUES ( '1000', 'John', NULL);
D . INSERT INTO employees (first_name, last_name, employee_id) VALUES ( 1000, 'John', 'Smith');
E . INSERT INTO employees (employee_id) VALUES (1000);
F . INSERT INTO employees (employee_id, first_name, last_name) VALUES ( 1000, 'John', ' ')
-
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE Which UPDATE statement is valid?（）
A . UPDATE employees SET first_name = 'John' SET last_name ='Smith' WHERE employee_id = 180;
B . UPDATE employees SET first_name = 'John', SET last_name ='Smith' WHERE employee_id = 180;
C . UPDATE employees SET first_name = 'John' AND last_name ='Smith' WHERE employee_id = 180;
D . UPDATE employees SET first_name = 'John', last_name ='Smith' WHERE employee_id = 180
-
蛋白质的一级结构
-
蛋白质的一级结构是指（）。
A . 蛋白质分子内氨基酸的排列顺序
B . 蛋白质的α-螺旋结构
C . 蛋白质分子内氨基酸以肽键相连接
D . 蛋白质分子的无规则卷曲
E . 蛋白质分子内的二硫键
-
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) Which three statements inserts a row into the table? （）
A . INSERT INTO employees VALUES (NULL, 'JOHN','Smith');
B . INSERT INTO employees( first_name, last_name) VALUES ('JOHN','Smith');
C . INSERT INTO employees VALUES ('1000','JOHN','NULL');
D . INSERT INTO employees(first_name,last_name, employee_id) VALUES ('1000, 'john','Smith');
E . INSERT INTO employees (employee_id) VALUES (1000);
F . INSERT INTO employees (employee_id, first_name, last_name) VALUES ( 1000, 'john',")
-
蛋白质二级结构（protein secondary structure）
-
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2 (25) LAST_NAME VARCHAR2 (25) HIRE_DATE DATE Which UPDATE statement is valid? （）
A . UPDATE employees SET first_name = 'John' SET last_name = 'Smith' WHERE employee_id = 180;
B . UPDATE employees SET first_name = 'John', SET last_name = 'Smoth' WHERE employee_id = 180;
C . UPDATE employee SET first_name = 'John' AND last_name = 'Smith' WHERE employee_id = 180;
D . UPDATE employee SET first_name = 'John', last_name = 'Smith' WHERE employee_id = 180
-
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) Which three statements insert a row into the table? （）
A . INSERT INTO employees VALUES (NULL, 'John', 'smith');
B . INSERT INTO employees (first_name, last_name) VALUES ('John', 'smith');
C . INSERT INTO employees VALUES ('1000, 'John', 'smith');
D . INSERT INTO employees (first_name, last_name, employee_id) VALUES (1000, 'John', 'smith');
E . INSERT INTO employees (employee_id) VALUES (1000);
F . INSERT INTO employees ( employee_id, first_name, last_name, ) VALUES (1000, 'John','')
-
什么是蛋白质的一级结构？为什么说蛋白质的一级结构决定其空间结构？
-
蛋白质四级结构（quaternary structure）
-
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE Which INSERT statement is valid? （）
A . INSERT INTO employees (employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01/01/01);
B . INSERT INTO employees(employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01 january 01');
C . INSERT INTO employees(employee_id, first_name, last_name, Hire_date) VALUES (1000, 'John', 'smith', To_ date ('01/01/01));
D . INSERT INTO employees(employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01-Jan-01')
-
蛋白质三级结构（protein tertiary structure）
-
蛋白质的一级结构及高级结构决定于 （）
-
具有蛋白质四级结构的蛋白质分子，在一级结构分析时发现
A．具有一个以上N端和C端
B．只有一个N端和C端
C．具有一个N端和几个C端
D．具有一个C端和几个N端
E．一定有二硫键存在
-
Network design is a primary responsibility of logistical management since a firm’s facility structure is used to ship products and materials to customers．()
A．正确
B．错误
-
蛋白质分子的空间结构与一级结构的关系是:（）
A．关系不大,因为空间结构主要靠次级键维持
B．关系密切,因为多肽链各氨基酸残
C．无关系,因为许多蛋白质除去部肽段后仍保持生物学活性
D．无关系,因为蛋白质变性不包括一级结构的破坏
E．无密
-
蛋白质的结构：蛋白质有一级结构、二级结构、三级结构、四级结构，只有具有高级结构的蛋白质才有生物活性。（)
是
否
-
研究蛋白质结构可分为一级、二级、三级、四级结构，所有蛋白质都具有四级结构。（)
此题为判断题(对，错)。
-
简答题：什么是蛋白质的一级结构？为什么说蛋白质的一级结构决定其空间结构？
-
Examine the structure of the EMPLOYEES table:EMPLOYEE_ID NUMBER Primary KeyFIRST_NAME VARCHAR2（25)LAST_NAME VARCHAR2（25)HIRE_DATE DATEWhich UPDATE statement is valid？（）
A.UPDATE employees SET first_name = ‘John‘ SET last_name =‘Smith‘ WHERE employee_id = 180;
B.UPDATE employees SET first_name = ‘John‘, SET last_name =‘Smith‘ WHERE employee_id = 180;
C.UPDATE employees SET first_name = ‘John‘ AND last_name =‘Smith‘ WHERE employee_id = 180;
D.UPDATE employees SET first_name = ‘John‘, last_name =‘Smith‘ WHERE employee_id = 180;
-
7、蛋白质的一级结构及高级结构决定于？
A．分子中盐键
B．分子内部疏水键
C．氨基酸组成和顺序
D．亚基
-
Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEESEMPLOYEE_ID NUMBER Primary KeyFIRST_NAME VARCHAR2 (25)LAST_NAME VARCHAR2 (25)HIRE_DATE DATENEW EMPLOYEESEMPLOYEE_ID NUMBER Primary KeyNAME VARCHAR2 (60)Which DELETE statement is valid？ （）
A. DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);
B. DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);
C. DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = (‘Carrey‘)‘
D. DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE last_ name = (‘Carrey‘)‘
