- 1. KHI NIM V PHN LOI1. Khi nimLin kt ca nhm CO vi nhm NH gia
hai n v a- amino axitc gi l linPeptit l nhng hp cht cha t 2 n 50gc
a- amino axit lin kt vi nhau bngcc lin kt peptit2. Phn
loiPeptitOligopeptit: cha t 2n 10 gc a- amino axitPolipeptit: cha t
11n 50 gc a- amino axitPROTEINA- Peptit
2. KHI NIM V PHN LOI1. Khi nimL nhng polipeptit cao phn t c phn
t khi tvi chc nghn n vi triu.2. Phn loiB- ProteinProteinProtein
nginCh gm a- amino axitProtein phctpProteinphi proteinAxit
nucleic,lipit,cacbohydrat , 3. CU TRCPeptitPhn t peptit hp thnh t
cc gc -amino axit ni vi nhau bi linkt peptit theo mt trt t nht nh:
amino axit u N cn nhm NH2,amino axit u C cn nhm COOH 4. CU TRCBc 1
Bc 2 Bc 3 Bc 4Chui polypeptitxon li to nncu trc xon v cu trc npgp ,
c cnh bi cc linkt hyro gianhng axit amin gn nhau tonn cu trc bc2.L
trnh t spxp ca cc nv a- amino axitnh cc lin ktpeptit trongmch
proteinChuipolypeptit dng xon hocgp np li tiptc co xon tonn cu
trckhng gian bachiu c trnggi l cu trcbc 3.L khi nimdng chonhng
proteingm hai haynhiu polipeptithnh cu (cutrc bc III)kt hp vinhau
bngnhiu lin ktv tng tc Protein 5. VIDEO 6. TNH CHT VT LA. Peptit-
Cc peptit thng th rn, c nhit nng chy cao v dtan trong ncB.
Proteina) Hnh dng:- Dng si: nh keratin (trong tc), miozin (trong
c),fibroin (trong t tm)- Dng cu: nh anbumin (trong lng trng
trng),hemoglobin (trong mu)b) Tnh tan trong nc:Protein hnh si khng
tan, protein hnh cu tanc) S ng t:L s ng li ca protein v tch ra khi
dung dch khiun nng hoc thm axit, baz, mui 7. TNH CHT HA HCPEPTITa)
Phn ng mu biure:- Da vo phn ng muca biure:H2NCONHCONH2 +Cu(OH)2 phc
cht mutm c trng- Amino axit v ipeptit khngcho phn ng ny.- Cc
tripeptit tr ln tc dngvi Cu(OH)2 to phc chtmu tmb) Phn ng thy phn:-
iu kin thy phn: xc tcaxit hoc kim v un nng- Sn phm: cc -amino
axitPROTEINa) Phn ng mu:b) Phn ng thy phn:- iu kin thy phn: xc tc
axit hockim v un nng hoc xc tc enzim- Sn phm: cc -amino axit 8. PHN
BITPEPTIT1. Phn ng mu biure+ Cu(OH)2 to phc cht cmu tm c
trngPROTEIN1. Phn ng mu biure+ Cu(OH)2 to phc cht c mu tm ctrng2.
phn ng vi HNO3 c to kt ta mu vng 9. CU HI TRC NGHIM 10. 1. Thuc th
c dng phn bit Gly-Ala-Gly v Gly-Ala l:A. dd HClB. Cu(OH)2/OH-C. dd
NaCl. D. dd NaOH. 11. 2. Thu phn
H2N-CH(CH3)-CO-NH-CH2-CO-NH-CH2-CH2-CO-NH-CH(C6H5)-CO-NH-CH(CH3)-COOH
th thu c nhiu nhtbao nhiu -amino axit ?A. 3B. 5C. 2 D. 4 12. 3. C 4
dung dch khng mu: glucoz, glixerol, h tinh bt vlng trng trng trong
bn l mt nhn ring bit. Ha chtdng phn bit 4 dung dch trn l:A. Dung
dch HNO3 cB. Dung dch I2C. Dung dch AgNO D. Cu(OH)2/OH- 3/NH3 13.
4. Thy phn hon ton 314,25 gam protein X thu c 877,5gam valin. Bit
rng phn t khi ca X l 6285. S mt xchVal trong phn t X lA. 192B.
197C. 20 D. 150 14. 5. Cho 3 cht X, Y, Z vo 3 ng nghim cha
snCu(OH)2 trong NaOH lc u v quan st th thy: Cht X thyxut hin mu tm,
cht Y th Cu(OH)2 tan v c mu xanhnht, cht Z th Cu(OH)2 tan v c mu
xanh thm. X, Y, Z lnlt l:A. H tinh bt, HCOOH,mantozD. Lng trng
trng,CH3COOH, glucozC. Anbumin, C2H5COOH,glyxinB. Protein,
CH3CHO,saccaroz 15. 6. Thy phn hon ton 1 mol oligopeptit X mch h
thu dc2 mol Gly, 1 mol Ala, 1 mol Val, 1 mol Tyr. Nu thy phnkhng
hon ton X th thu c sn phm c cha Gly Val,Val Gly. S cng thc cu to ph
hp ca X lA. 6B. 1C. 2 D. 4 16. 7. Trong cc protein di y, protein no
tn ti dng hnhcu?A. KeratinB. MiozinC. Fibroin D. Anbumin 17. 8. Xc
nh phn t khi gn ng ca mt hemoglobin cha0,4% Fe (mi phn t hemoglobin
ch cha mt nguyn tFe)?A. 11000B. 12000C. 14000 D. 13000 18. 9. u
xanh cha khong 30% protein, protein ca u xanhcha khong 40% axit
glutamic: HOOC-CH2-CH2-CH(NH2)-COOH. Mui natri ca axit ny l m chnh
(bt ngt): NaOOC-CH2-CH2-CH(NH2)-COOH (mono natri glutamat). S gam
mchnh c th iu ch c t 1kg u xanh l:A. 137,96 gamB. 173,96 gamC.
137,69 gam D. 138,95 gam 19. 10. Thy phn 14(g) mt Polipeptit(X) vi
hiu sut t 80%,th thu c 14,04(g) mt aminoacid (Y). Xc nh CTCT caY?A.
H2N(CH2)2COOHB. H2NCH(CH3)COOHC. H D. H2NCH(C2H5)COOH 2NCH2COOH
