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习题练习:SL/HL Topic C1.1 Enzymes and metabolism



 作者: admin   总分: 16分  得分: _____________

答题人: 匿名未登录  开始时间: 25年01月31日 10:44  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) (组内1/4) 切至整卷模式 搜藏此题  
第 1 题组 (共 4 题 4 分)
  1. How is reliability established in an enzyme experimexs / su1p2jbh7nt?

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2#
 
单选题 ( 1.0 分) (组内2/4) 切至整卷模式 搜藏此题  
  2. What can cause an enzyme to be dep3ith do, f3;snatured?

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3#
 
单选题 ( 1.0 分) (组内3/4) 切至整卷模式 搜藏此题  
  3. Which of the followi7ozri*zn- l/w 3 jdt*dng correctly describe aspects of a metabolic pathway?
I. It is regulated by one enzyme.
II. It is a series of reactions to produce an end product.
III. It is a system producing energy.
IV. It can be anabolic or catabolic in nature.

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4#
 
单选题 ( 1.0 分) (组内4/4) 切至整卷模式 搜藏此题  
  4. The binding of the subsdcwp 8d+5cu4otrate to the active site of an enzyme causes which of th+8udp 5 do4cwce following changes?
I. A change in the shape of the active site.
II. A change in the shape of the substrate.
III. A lowering of the activation energy of the reaction.
IV. The denaturation of the enzyme.

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5#
 
问答题 ( 1.0 分) (组内1/7) 切至整卷模式 搜藏此题  
第 2 题组 (共 7 题 7 分) 当前第1/7题
题组内容描述:
5. Invertase is a hydrolysing enzyme which hydrolyses the disaccharide sucrose into the monosaccharides glucose and fructose. In an investigation,10cm3of 1% invertase was added to10cm3of 1% sucrose in a50cm3 beaker. Every minute, the concentration of glucose was measured using a glucose meter which directly reads the concentration of glucose in a solution in mmol/dm3.The raw data is given In the table below:
I. Explain why glucose is formed in the5k19e:te4s3 2 p3y pko f 8w5xoorwpqg reaction mixture.
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6#
 
问答题 ( 1.0 分) (组内2/7) 切至整卷模式 搜藏此题  
第 2 题组 (共 7 题 7 分) 当前第2/7题
题组内容描述:
5. Invertase is a hydrolysing enzyme which hydrolyses the disaccharide sucrose into the monosaccharides glucose and fructose. In an investigation,10cm3of 1% invertase was added to10cm3of 1% sucrose in a50cm3 beaker. Every minute, the concentration of glucose was measured using a glucose meter which directly reads the concentration of glucose in a solution in mmol/dm3.The raw data is given In the table below:
II. List two variables that should be controlled in(q7, iv 0buwlz this experiment, other than those 7z(w, lqvi0 bugiven.
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7#
 
问答题 ( 1.0 分) (组内3/7) 切至整卷模式 搜藏此题  
第 2 题组 (共 7 题 7 分) 当前第3/7题
题组内容描述:
5. Invertase is a hydrolysing enzyme which hydrolyses the disaccharide sucrose into the monosaccharides glucose and fructose. In an investigation,10cm3of 1% invertase was added to10cm3of 1% sucrose in a50cm3 beaker. Every minute, the concentration of glucose was measured using a glucose meter which directly reads the concentration of glucose in a solution in mmol/dm3.The raw data is given In the table below:
III. Does the data collected indicate that the ramji0 -ae4ef 3fte of the reaction is constant in the first e4efi0 fjm3 -a3 minutes?
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8#
 
问答题 ( 1.0 分) (组内4/7) 切至整卷模式 搜藏此题  
第 2 题组 (共 7 题 7 分) 当前第4/7题
题组内容描述:
5. Invertase is a hydrolysing enzyme which hydrolyses the disaccharide sucrose into the monosaccharides glucose and fructose. In an investigation,10cm3of 1% invertase was added to10cm3of 1% sucrose in a50cm3 beaker. Every minute, the concentration of glucose was measured using a glucose meter which directly reads the concentration of glucose in a solution in mmol/dm3.The raw data is given In the table below:
IV. Calculate the rate of reactilckk/(3f *jwyb 1qvxiyn z6 b.xb0*:gon in the first 5 minutes
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9#
 
问答题 ( 1.0 分) (组内5/7) 切至整卷模式 搜藏此题  
第 2 题组 (共 7 题 7 分) 当前第5/7题
题组内容描述:
5. Invertase is a hydrolysing enzyme which hydrolyses the disaccharide sucrose into the monosaccharides glucose and fructose. In an investigation,10cm3of 1% invertase was added to10cm3of 1% sucrose in a50cm3 beaker. Every minute, the concentration of glucose was measured using a glucose meter which directly reads the concentration of glucose in a solution in mmol/dm3.The raw data is given In the table below:
V. Describe the changes gpc pi* fcow16f* j9h9 fa9y(cin the rate of reaction from the 4th to the 8th minute.
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10#
 
问答题 ( 1.0 分) (组内6/7) 切至整卷模式 搜藏此题  
第 2 题组 (共 7 题 7 分) 当前第6/7题
题组内容描述:
5. Invertase is a hydrolysing enzyme which hydrolyses the disaccharide sucrose into the monosaccharides glucose and fructose. In an investigation,10cm3of 1% invertase was added to10cm3of 1% sucrose in a50cm3 beaker. Every minute, the concentration of glucose was measured using a glucose meter which directly reads the concentration of glucose in a solution in mmol/dm3.The raw data is given In the table below:
VI. Why was it not necessary to collect data ; m g8nu3y 1ivvmeqw3/hi27lo after the 8th minute?
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11#
 
问答题 ( 1.0 分) (组内7/7) 切至整卷模式 搜藏此题  
第 2 题组 (共 7 题 7 分) 当前第7/7题
题组内容描述:
5. Invertase is a hydrolysing enzyme which hydrolyses the disaccharide sucrose into the monosaccharides glucose and fructose. In an investigation,10cm3of 1% invertase was added to10cm3of 1% sucrose in a50cm3 beaker. Every minute, the concentration of glucose was measured using a glucose meter which directly reads the concentration of glucose in a solution in mmol/dm3.The raw data is given In the table below:
VII. Predict, with a reason, the fructose concentration in the react8y,an3u,2hrbxgg s4(r 0z t uvion mixture ath ,n gtvsar 023x8uuy4r,bg z( the 6th minute.
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12#
 
问答题 ( 1.0 分) (组内1/1) 切至整卷模式 搜藏此题  
第 3 题组 (共 1 题 1 分)
6. Enzymes are specific to a particular reaction. Explain why enzy* woa(;24c7cbf 2klyltaev n4me specificity is important in the control of metabolic po a yfw24ekb2 l4;c(c7*nvltaathways.
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13#
 
问答题 ( 1.0 分) (组内1/3) 切至整卷模式 搜藏此题  
第 4 题组 (共 3 题 3 分) 当前第1/3题
题组内容描述:
7. Penicillin is an antibiotic which is a competitive inhibitor of a transpeptidase enzyme in bacteria. This enzyme is involved in creating peptide cross links between the polysaccharide polymers found in peptidoglycan call walls in prokaryote cells.Use your knowledge of enzyme function to explain the following statements:
I. Penicillin does not af2iuujb1n/j5u;-so7h. bxx yf v7sj 6zfect human enzymes.
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14#
 
问答题 ( 1.0 分) (组内2/3) 切至整卷模式 搜藏此题  
第 4 题组 (共 3 题 3 分) 当前第2/3题
题组内容描述:
7. Penicillin is an antibiotic which is a competitive inhibitor of a transpeptidase enzyme in bacteria. This enzyme is involved in creating peptide cross links between the polysaccharide polymers found in peptidoglycan call walls in prokaryote cells.Use your knowledge of enzyme function to explain the following statements:
II. Penicillin is a permanent competitive inhibitor of traby0r a6ela *7dnspeptidase.
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15#
 
问答题 ( 1.0 分) (组内3/3) 切至整卷模式 搜藏此题  
第 4 题组 (共 3 题 3 分) 当前第3/3题
题组内容描述:
7. Penicillin is an antibiotic which is a competitive inhibitor of a transpeptidase enzyme in bacteria. This enzyme is involved in creating peptide cross links between the polysaccharide polymers found in peptidoglycan call walls in prokaryote cells.Use your knowledge of enzyme function to explain the following statements:
III. Suggest how penicillin resistance has develop ;)31vjt b8/ g )f,:mket8fo+zltprcu we2ajqed in some bacteria.
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16#
 
问答题 ( 1.0 分) (组内1/1) 切至整卷模式 搜藏此题  
第 5 题组 (共 1 题 1 分)
8. ATP is an allosteric inhibitor of phosphofructokinase and pyruvate kinase, twgp-bywyc: pzkb9xr1g5)/pu,o enzymes involved in glycolysis. Discuss the importance of feedback inhibition of metab1 95 :pg,kpb pwg)u/zxry- ybcolic pathways in biological systems using this as an example.
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