2015貴州省現(xiàn)代預(yù)防醫(yī)學(xué)考試題庫（2015 Guizhou modern preventive medicine examination question bank）

1、2015貴州省現(xiàn)代預(yù)防醫(yī)學(xué)考試題庫（2015 Guizhou modern preventive medicine examination question bank）1, the amount of root formation depends on ()A. glaze formerB. dental papillaC. tooth sacD. epithelial root sheathE. epithelial septumThe correct answer: E,2. How many layers of epithelial cells are covered in the or

2、iginal oral cavity at the fifth week of the embryo?A.1B.2C.3D.4E. or more is wrongThe correct answer: B3. Nucleic acid hybridization refers toA. different nucleic acid chains are denatured and form a local double strand between themA single strand of a small nucleotide polymer, labeled with a radioa

3、ctive isotope or organism, whose end or whole chain is B.C. transport amino acidsD. single strand DNA into double stranded DNAE.50% double stranded DNA denaturation at temperatureThe correct answer: A,4. The common enzyme groups are ()A. carboxyl group, carbonyl group, aldehyde group, ketone baseB.

4、carboxyl group, hydroxyl group, amino group and sulfhydryl groupC. carboxyl group, carbonyl group, ketone group and acyl groupD. amino group, carboxyl group, sulfhydryl group and hydroxyl groupE. hydroxy group, carbonyl group, carboxyl group and aldehyde groupThe correct answer: B901,Not belonging t

5、o the vitamin B coenzyme is ()A. pyridoxal-5-phosphateB. cytochrome CC. coenzyme AD. leucovorinE. thiamine pyrophosphateThe correct answer: B,902,The statement about the key enzyme is correctA. has the lowest catalytic activity in the enzyme systemB. is often an enzyme in the intermediate reaction o

6、f the enzyme systemC. catalyzed reversible reactionD. the regulation of the enzyme activity does not change the reaction rate of the whole reaction systemThe starting substance of E. reaction system can regulate the key enzymeThe correct answer: A,903,As regards the regulation of covalent modificati

7、ons, the correct one is ()The A. metabolite acts on the allosteric site of the enzyme, causing conformational changes in the enzymeB. when the enzyme is synthesized or secreted in the cell, there is no enzyme activityC. the enzyme is reversibly covalently modified by certain specific groups under th

8、e action of other enzymesThe D. regulation process has no progressive amplificationE. covalent modification consumes more than ATP and is not economically effectiveThe correct answer: C,904,Which statement of allosteric regulation (or allosteric enzymes) is incorrect ()The catalytic site and alloste

9、ric site of A. are located at the same subunitB. contains more than one subunitThe C. kinetic curve shows a s type curveD. allosteric regulation can effectively and timely adapt to changes in the environmentE. this regulation regulates the entire metabolic pathwayThe correct answer: A,905,Which one

10、is correct about the description of isozyme?A. enzymes have the same primary structureB. catalyzes the same chemical reactionC. isozymes are the sameThe biological functions of D. isozymes may differThe physical and chemical properties of E. isozymes are identicalThe correct answer: B906,The concept

11、 of zymogen activation is correctThe zymogen secreted by A. has enzyme activityThe conversion of B. zymogen into an enzyme is reversibleC. inactive zymogen is converted to active enzymeD. zymogen activation has no important physiological significanceE. zymogen activation is a modification of zymogen

12、 proteinThe correct answer: C,907,A statement about the characteristics of an enzyme competitive inhibitor is incorrectThe A. inhibitors are similar in structure to the substrateB. inhibitors compete with substrates for substrate binding in competitive enzyme moleculesC. when the inhibitor is presen

13、t, the value becomes largerWhen the D. inhibitor is constant, the maximum reaction rate can be achieved by increasing the substrate concentrationE. inhibitors covalently bind to enzyme moleculesThe correct answer: E,908,Riboflavin containing coenzyme is ()A.FMNB.HS - CoAC.D.E.CoQThe correct answer:

14、A,909,Competitive inhibition is characterized by ()A. decreases and decreasesB. increases and V increasesC. decreases and increasesD. increases and remains unchangedE. invariant, decreasingThe correct answer: D,910,Non competitive inhibition is characterized by ()A. decreases and decreasesB. increas

15、es and V increasesC. decreases and increasesD. increases and remains unchangedE. invariant, decreasingThe correct answer: E,911,Malic acid dehydrogenase coenzyme is ()A.NADB.FADC. pyridoxal-5-phosphateD.TPPE.HSCoAThe correct answer: A,912,Prokaryotic enzymes involved in transcription initiation are

16、()A. unwinding enzymeB. primersC.RNA polymerase IIID.RNA polymerase holoenzymeE.RNA polymerase core enzymeThe correct answer: D,913,In eukaryotes, the transcription products produced by RNA polymerase II are ()A.mRNAB.18S rRNAC.28S rRNAD.tRNAE. all RNAThe correct answer: A,914,In eukaryotes, the tra

17、nscription of tRNA and 5S rRNA is catalyzed by which of the following enzymes?A.RNA polymerase IB. reverse transcriptaseC.RNA polymerase IID.RNA polymerase holoenzymeE.RNA polymerase IIIThe correct answer: E,915,The sequence of amino acids in protein molecules is determined by (?)Types of A. amino a

18、cidsB.tRNAC. peptidaseSequence of single nucleotide in D.mRNA moleculeE. ribosomeThe correct answer: D,916,The following password error statement is ()A. password without punctuationB. has the stop and start passwordThe C. password is degenerateThe D. password is genericThe amino acids in the E. pro

19、tein have a corresponding codonThe correct answer: E,917,A false account of protein synthesis is ()A.20 kinds of amino acids have corresponding passwordsB. amino acids are covalently linked to tRNA by amino groupsC. amino acids are linked to tRNA 3endsThe D. ribosome is the site of protein translati

20、onE.mRNA is a direct template for peptide synthesisThe correct answer: B,918,The process involved in the process of translation of prokaryotic cells is (?)A. initial amino acyl -tRNA generationB. size subunit bindingC. peptide termination phaseD.mRNA combines with a small subunitE. peptide bond form

21、ationThe correct answer: A,919,Aminoacyl -tRNA synthetase is characterized by ()A. is present in the nucleusB. catalyzed reaction takes GTPC. is specific to amino acids and tRNAD. tRNA directly generate formylethionylE. has only absolute specificity for amino acidsThe correct answer: C,920,A tRNA co

22、unter cipher is 5-IGC-3, which can identify the password ()A.5-GCA-3B.5-GCG.3 7C.5-CCG-3D.5-ACG-3E.5-UCG-3The correct answer: A,921,Which of the following diseases is related to the defect in the DNA repair process?A. goutB. jaundiceC. broad bean diseaseD.s dry skin diseaseE. porphyriaThe correct an

23、swer: D,922,The cause of this disease is ()A.DNA has a defect in the repair system of the two merB. cell membrane permeability defects cause rapid dehydrationC. UV irradiation induced a toxic precursor virusD. inactivation of temperature sensitive transferaseE. vitamin deficiencyThe correct answer:

24、A,923,Sickle anemia is caused by a mutation in the hemoglobin chain geneA. point mutationB. insertionC. deletionD. inversionE. frameshift mutationThe correct answer: A,924,Using electron microscopy to observe the replication of DNA in prokaryotes and eukaryotes, it is possible to see the phenomenon

25、of replication into a forkA.DNA double chains are unwinding by unwinding enzymesThe B. topology plays a role in the formation of intermediatesC. has multiple replication start pointsIntermediate D. connection of the Okazaki fragmentE. unidirectional replication causedThe correct answer: A,925,In the

26、 DNA replication experiments, all DNA replication components were retained, but DNA polymerase II instead of DNA ligase was used to test possible consequencesA.DNA is highly winding and cannot be used as a templateB.DNA is broken up into countless fragmentsC. without RNA primers could not be replica

27、tedThe replication of the D. chain cannot be completedE. generated an excess of Okazaki fragmentsThe correct answer: D,926,In the process of DNA replication, the genetic information of the mother chain must be accurately transferred to the sub chain, that is, the fidelity of replication. Which of th

28、e following conditions can cause replication distortion?A.AT, G-C pairingB.DNA polymerase selects paired basesC.DNA polymerase real time readingD.DNA polymerase dependent templateE.DNA polymerase III lacks subunitsThe correct answer: E,927,The extended phase of peptide synthesis in prokaryotes requi

29、res the introduction of aminoacyl tRNA into the ribosomal A site, with mRNA codon identification, and the elongation factor component involved in this action should be ()A.EFTuGTPB.EFTsC.EFTu-GDPD.EFTGE.EFTs-GTPThe correct answer: A,928,In the prokaryotic polypeptide chain, the translation stage has

30、 the release factor RF, the recognition binding termination codon, the release factor induces the following action in which the error is ()A. endopeptidase acts as peptide chain hydrolaseB. promotes the shedding of tRNA on ribosomesC. promotes the synthesis of peptide chains into a space conformatio

31、nD. promotes synthesis of peptide chainsSeparation of E.mRNA from ribosomesThe correct answer: C,929,When the peptide chain is synthesized by hydroxylation, it is ()A. serineB. hydroxyprolineC. cystineD. methionineE. threonineThe correct answer: B,930,Formed by the oxidation of two cysteine groups o

32、f -SHA. serineB. hydroxyprolineC. cystineD. methionineE. threonineThe correct answer: C,931,The coenzyme of succinate dehydrogenase is ()A.NADB.FADC. pyridoxal-5-phosphateD.TPPE.HSCoAThe correct answer: B,932,GPT (or GOT) coenzyme is ()A.NADB.FADC. pyridoxal-5-phosphateD.TPPE.HSCoAThe correct answer

33、: C,933,The coenzyme that contains vitamins is ()A.NADB.FADC. pyridoxal-5-phosphateD.TPPE.HSCoAThe correct answer: C,934,The coenzyme that contains vitamin pantothenic acid is ()A.NADB.FADC. pyridoxal-5-phosphateD.TPPE.HSCoAThe correct answer: E,935,The reaction to substrate level phosphorylation is

34、 ()A. glucose 6 to glucose phosphateB.6- diphosphate fructose 1, 6- two fructose phosphateGlyceraldehyde C.3- phosphate - 1 - 3-D. succinate CoAE. pyruvate acetyl CoAThe correct answer: D936,The metabolic process that does not supplement blood sugar is ()A. muscle glycogen breakdownB. hepatic glycog

35、en breakdownC. carbohydrate food digestion and absorptionD. gluconeogenesisReabsorption of E. in renal tubular epithelial cellsThe correct answer: A,937,The glucose carrier in glycogen synthesis is ()A.CDPB.ADPC.UDPD.TDPE.GDPThe correct answer: C,938,In glucose metabolism, compounds associated with

36、substrate level phosphorylation are (?)A.3- phosphate glycerol aldehydePhosphoglycerate B.3-C.6- phospho gluconic acidD.1, 3- -Phosphoglycerate E.2-The correct answer: D,5, the reason for the formation of transverse cracks isIn A., nasal process and lateral nasal process do not unite or unite incomp

37、leteB. side nasal process and maxillary process do not unite or unite incompleteIn C., nasal process and maxillary process do not unite or uniteD. the maxillary process is not associated with or associated with the mandibular processE. the maxillary process is not associated with or associated with the globular processThe correct answer: D,6, subunit depolymerization ()A. primary structu