生物化学英文选择

1.WhatistherateofDNAtranslation?(A)80nucleotidespersecond(B)200nucleotidespersecond(C)60nucleotidespersecond(D)40nucleotidespersecond2.Whichofthefollowingisnotacommonhydrogenbondacceptor?(A)Acarbonyl(B)Primaryamine(C)Hydroxyl(D)Tertiaryamine3.DuringDNAreplication,the3'–OHofthegrowingDNAchainattackswhichphosphateofanincomingnucleotide?(A)Alpha(B)Beta(C)Gamma(D)Delta4.Theidealspacingbetweenthe–10and–35regionsofaprokaryoticpromoteris:(A)14(B)15(C)16(D)175.The5'cappingprocesscreateswhattypeoflinkage?(A)5'-3'(B)3'-5'(C)5'-5'(D)3'-3'6.ThebondbetweenaphosphategroupandtheribosesugargroupinRNAiscalledwhichofthefollowing?(A)Phosphodiesterlinkage(B)Glycosidicbond(C)Peptidebond(D)Amidebond7.WhichofthefollowingisdoesnotplayaroleinDNAreplication?(A)DNApolymerase(B)Helicase(C)Single-strandedbindingprotein(D)Guanyltransferase8.Splicingistheprocessthatdoeswhichofthefollowing?(A)Removeintronsandconserveexons(B)Removeexonsandconserveintrons(C)RemovemutatedregionsofprimarytranscriptRNA(D)AddmultipleadenosinebasestotheendofaprimaryRNAtranscript9.WhichofthefollowingisnotacharacteristicofeukaryoticDNAtranscription?(A)MultipleRNApolymerases(B)TATA-bindingprotein(C)Strictpromotersequences(D)Transcriptionfactors10.WhichofthefollowingcodonscannotberecognizedbyatRNAmolecule?(A)UAA(B)CGA(C)UUU(D)AUG