皮皮学，免费搜题
登录
搜题
【多选题】
下面有关酶的叙述错误的是
A.
酶的催化特性不仅取决于其一级结构，也取决于它的高级结构
B.
酶具有高效催化一个反应的能力，其主要原因是它大大降低了反应的活化能
C.
酶对催化的底物具有高度的立体选择性，但它不能识别一个前手性中心
D.
酶对催化的底物的选择性并非都是绝对的
E.
酶的比活力反映的是酶催化一个反应的能力，比活力越大，酶催化能力越强
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】正常尿液比重波动范围是
A.
1．10～1．015
B.
1．015～1．025
C.
1．005～1．020
D.
1．015～1．035
E.
1．025～1．o45
查看完整题目与答案
【单选题】缺少维生素A导致夜盲症是因为
A.
合成视黄醛的原料减少，视紫红质减少。
B.
视锥细胞减少。
C.
视杆细胞减少。
D.
双极细胞功能下降
查看完整题目与答案
【单选题】In short, there is little about today's celebrity culture that is fundamentally more harmful than the types of celebrity children have encountered in the past. Provided children are given appropriate ...
A.
restate their opinion
B.
summarize the main points
C.
make a recommendation
D.
make a prediction (often stating what may happen if the recommended action is or is not taken)
查看完整题目与答案
【简答题】While accepting that this sequence fits the archaeological profile of those sites, which were occupied continuously over many thousands of years a number of writers have warned that the underlying ass...
查看完整题目与答案
【单选题】The function of the periosteum in supporting new bone growth is determined fundamentally by paracrine/endocrine signals that regulate the differentiation of which of the following connective tissue ce...
A.
Fibroblasts
B.
Osteoblasts
C.
Osteoclasts
D.
Osteocytes
E.
Osteoprogenitor cells
查看完整题目与答案
【简答题】夜盲症是因为缺少哪种维生素所导致？
查看完整题目与答案
【单选题】夜盲症是因为
A.
视杆细胞减少
B.
色素上皮顶部突起增多
C.
视锥细胞膜盘脱落
D.
视紫红质缺乏
E.
维生素C不足
查看完整题目与答案
【单选题】正常儿童的尿液比重范围是（）
A.
＜1.010
B.
1.005～1.015
C.
1.006～1.008
D.
1.010～1.025
E.
＞1.025
查看完整题目与答案
【单选题】正常儿童的尿液比重范围是( )
A.
1.005～1.015
B.
1.006～1.008
C.
1.010～1.025
D.
小于1.010
E.
大于1.025
查看完整题目与答案
【单选题】There once lived a poor tailor who had a son called Aladdin, a careless, idle boy【21】would do nothing but play all day long in the streets with little idle boys like himself. This so grieved the fathe...
A.
he
B.
who
C.
which
D.
what
查看完整题目与答案
相关题目：
【单选题】正常尿液比重波动范围是
A.
1．10～1．015
B.
1．015～1．025
C.
1．005～1．020
D.
1．015～1．035
E.
1．025～1．o45
查看完整题目与答案
【单选题】缺少维生素A导致夜盲症是因为
A.
合成视黄醛的原料减少，视紫红质减少。
B.
视锥细胞减少。
C.
视杆细胞减少。
D.
双极细胞功能下降
查看完整题目与答案
【单选题】In short, there is little about today's celebrity culture that is fundamentally more harmful than the types of celebrity children have encountered in the past. Provided children are given appropriate ...
A.
restate their opinion
B.
summarize the main points
C.
make a recommendation
D.
make a prediction (often stating what may happen if the recommended action is or is not taken)
查看完整题目与答案
【简答题】While accepting that this sequence fits the archaeological profile of those sites, which were occupied continuously over many thousands of years a number of writers have warned that the underlying ass...
查看完整题目与答案
【单选题】The function of the periosteum in supporting new bone growth is determined fundamentally by paracrine/endocrine signals that regulate the differentiation of which of the following connective tissue ce...
A.
Fibroblasts
B.
Osteoblasts
C.
Osteoclasts
D.
Osteocytes
E.
Osteoprogenitor cells
查看完整题目与答案
【简答题】夜盲症是因为缺少哪种维生素所导致？
查看完整题目与答案
【单选题】夜盲症是因为
A.
视杆细胞减少
B.
色素上皮顶部突起增多
C.
视锥细胞膜盘脱落
D.
视紫红质缺乏
E.
维生素C不足
查看完整题目与答案
【单选题】正常儿童的尿液比重范围是（）
A.
＜1.010
B.
1.005～1.015
C.
1.006～1.008
D.
1.010～1.025
E.
＞1.025
查看完整题目与答案
【单选题】正常儿童的尿液比重范围是( )
A.
1.005～1.015
B.
1.006～1.008
C.
1.010～1.025
D.
小于1.010
E.
大于1.025
查看完整题目与答案
【单选题】There once lived a poor tailor who had a son called Aladdin, a careless, idle boy【21】would do nothing but play all day long in the streets with little idle boys like himself. This so grieved the fathe...
A.
he
B.
who
C.
which
D.
what
查看完整题目与答案