2022 Biochemistry(China Medical University) 最新满分章节测试答案

文章目录[隐藏]

Chapter1 Introduction to Metabolism quiz1
Chapter2 Carbohydrate Metabolism quiz2
【作业】Chapter2 Carbohydrate Metabolism Homework
Chapter3 Biology Oxidation quiz3
Chapter4 Lipids Metabolism quiz4
【作业】Chapter4 Lipids Metabolism Homework
Chapter5 Metabolism of Amino Acids quiz5
【作业】Chapter5 Metabolism of Amino Acids Homework

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2022-03-01到2022-06-30

Chapter1 Introduction to Metabolism quiz1

1、问题:Which one below is NOT a kind of high energy compound?
选项：
A:ATP
B:G-6-P
C:Glycerate-1,3-bisphosphate
D:Phosphocreatine
答案: 【G-6-P】

2、问题:Enzymes are potent catalysts because they:
选项：
A:are consumed in the reactions they catalyze.
B:are very specific and can prevent the conversion of products back to substrates.
C:increase the equilibrium constants for the reactions they catalyze.
D:lower the activation energy for the reactions they catalyze.
答案: 【lower the activation energy for the reactions they catalyze.】

3、问题:Which statement about allosteric control of enzymatic activity is FALSE?
选项：
A:Allosteric effectors give rise to sigmoidal V versus [S] kinetic plots.
B:An effector may either inhibit or activate an enzyme.
C:Binding of the effector changes the conformation of the enzyme molecule.
D:Heterotropic allosteric effectors compete with substrate for binding sites.
答案: 【Heterotropic allosteric effectors compete with substrate for binding sites.】

4、问题:A small molecule that DECREASES the activity of an enzyme by binding to a site other than the catalytic site is termed a(n):
选项：
A:allosteric inhibitor.
B:alternative inhibitor.
C:competitive inhibitor.
D:stereospecific agent.
答案: 【allosteric inhibitor.】

5、问题:Which amino acid is NOT one that may be targeted for phosphorylation to modulate the activity of an enzyme?
选项：
A:Tyr
B:Ser
C:Ala
D:Thr
答案: 【Ala】

6、问题:Which type of enzyme is responsible for attaching phosphate groups to specific amino acids?
选项：
A:a protein phosphatase
B:a protein kinase
C:a protein glycosylase
D:an ATPase
答案: 【a protein kinase】

Chapter2 Carbohydrate Metabolism quiz2

1、问题:Which reaction in glycolysis requires ATP as a substrate?
选项：
A:hexokinase
B:glyceraldehyde-3-phosphate dehydrogenase
C:pyruvate kinase
D:aldolase
答案: 【hexokinase】

2、问题:Which reaction in glycolysis produces ATP as a product?
选项：
A:hexokinase
B:glyceraldehyde-3-phosphate dehydrogenase
C:pyruvate kinase
D:phosphofructokinase-1
答案: 【pyruvate kinase】

3、问题:During strenuous exercise, the NADH formed in the glyceraldehyde 3-phosphate dehydrogenase reaction in skeletal muscle must be reoxidized to NAD+ if glycolysis is to continue. The most important reaction involved in the reoxidation of NADH is:
选项：
A:dihydroxyacetone phosphate → glycerol 3-phosphate.
B:pyruvate → lactate.
C: isocitrate → α-ketoglutarate.
D:oxaloacetate → malate.
答案: 【pyruvate → lactate.】

4、问题:The anaerobic conversion of 1 mol of glucose to 2 mol of lactate by fermentation is accompanied by a net gain of:
选项：
A: 1 mol of ATP.
B:1 mol of NADH.
C: 2 mol of ATP.
D:2 mol of NADH.
答案: 【 2 mol of ATP.】

5、问题:In comparison with the resting state, actively contracting human muscle tissue has a:
选项：
A: higher concentration of ATP.
B:higher rate of lactate formation.
C:lower consumption of glucose.
D:lower rate of consumption of oxygen
答案: 【higher rate of lactate formation.】

6、问题:Which compound CANNOT serve as the starting material for the synthesis of glucose via gluconeogenesis?
选项：
A:acetate
B:glycerol
C:lactate
D:oxaloacetate
答案: 【acetate】

7、问题:An enzyme used in both glycolysis and gluconeogenesis is:
选项：
A:3-phosphoglycerate kinase.
B:glucose 6-phosphatase.
C:hexokinase.
D:phosphofructokinase-1.
答案: 【3-phosphoglycerate kinase.】

8、问题:Which statement about gluconeogenesis is FALSE?
选项：
A:For starting materials, it can use carbon skeletons derived from certain amino acids.
B:It consists entirely of the reactions of glycolysis, operating in the reverse direction.
C:It employs the enzyme glucose 6-phosphatase.
D:It is one of the ways that mammals maintain normal blood glucose levels
答案: 【It consists entirely of the reactions of glycolysis, operating in the reverse direction.】

9、问题: In humans, gluconeogenesis:
选项：
A:can result in the conversion of protein into blood glucose.
B:helps to reduce blood glucose after a carbohydrate-rich meal.
C:is essential in the conversion of fatty acids to glucose.
D:requires the enzyme hexokinase.
答案: 【can result in the conversion of protein into blood glucose.】

10、问题:Which statement about the pentose phosphate pathway is CORRECT?
选项：
A:It generates 36 mol of ATP per mole of glucose consumed.
B:It is a reductive pathway; it consumes NADH.
C: It is present in plants, but not in animals.
D: It provides precursors for the synthesis of nucleotides.
答案: 【 It provides precursors for the synthesis of nucleotides.】

11、问题:The metabolic function of the pentose phosphate pathway is to:
选项：
A:act as a source of ADP biosynthesis.
B:generate NADPH and pentoses for the biosynthesis of fatty acids and nucleic acids.
C:participate in oxidation-reduction reactions during the formation of H2O.
D:provide intermediates for the citric acid cycle.
答案: 【generate NADPH and pentoses for the biosynthesis of fatty acids and nucleic acids.】

12、问题:Which compound(s) is/are a high-energy intermediate(s) in glycolysis?
选项：
A:fructose 1,6-bisphosphate
B:NADH
C:1,3-bisphosphoglycerate and phosphoenol pyruvate
D:fructose 1,6-bisphosphate, 1,3-bisphosphoglycerate, and phosphoenol pyruvate
答案: 【1,3-bisphosphoglycerate and phosphoenol pyruvate】

13、问题:Malonate is a competitive inhibitor of succinate dehydrogenase. If malonate is added to a mitochondrial preparation that is oxidizing pyruvate as a substrate, which compound would you expect to decrease in concentration?
选项：
A:citrate
B:fumarate
C:isocitrate
D:pyruvate
答案: 【fumarate】

14、问题:Which compound is NOT an intermediate of the citric acid cycle?
选项：
A:acetyl-CoA
B:citrate
C:oxaloacetate
D:succinyl-CoA
答案: 【acetyl-CoA】

15、问题: In mammals, what process does NOT occur during the citric acid cycle?
选项：
A:formation of α-ketoglutarate
B:generation of NADH and FADH2
C:metabolism of acetyl-CoA to carbon dioxide
D:net synthesis of oxaloacetate from acetyl-CoA
答案: 【net synthesis of oxaloacetate from acetyl-CoA】

16、问题:Conversion of 1 mol of acetyl-CoA to 2 mol of CO2 and CoA via the citric acid cycle results in the net production of:
选项：
A:1 mol of citrate.
B:1 mol of FADH2.
C:1 mol of NADH.
D:1 mol of oxaloacetate.
答案: 【1 mol of FADH2.】

17、问题:Which factor is NOT associated with the oxidation of substrates by the citric acid cycle?
选项：
A:CO2 production
B:FADH2
C:NADH
D:NADPH