Video: Vim li cas lub cell membrane teem nyob rau hauv ib tug bilayer?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Phospholipids nyob rau hauv cov ntshav plasma daim nyias nyias yog npaj hauv ob txheej, hu ua phospholipid bilayer . Cov molecules uas yog hydrophobic tau yooj yim dhau los ntawm plasma daim nyias nyias , yog hais tias lawv me me, vim hais tias lawv yog cov dej-ntxuav zoo li sab hauv ntawm lub daim nyias nyias.
Hauv qhov no, vim li cas lub cell membrane yog bilayer?
Lipid Bilayer Structure Cov lipid bilayer yog ib tug universal feem ntawm tag nrho cov cell daim nyias nyias . Nws lub luag haujlwm tseem ceeb heev vim tias nws cov qauv tsim muaj qhov cuam tshuam uas ua rau thaj tsam ntawm ib qho cell . Cov qauv hu ua "lipid bilayer "vim nws yog tsim los ntawm ob txheej roj hlwb teeb tsa hauv ob daim ntawv.
Tsis tas li ntawd, vim li cas cov plasma membranes tau npaj ua bilayer es tsis yog monolayer? Txij li ob qho tib si sab nrauv thiab sab hauv ntawm a cell yog dej, ob qho tib si daim nyias nyias Qhov chaw yuav tsum yog hydrophilic. Raws li koj tuaj yeem pom, cov no monolayer daim nyias nyias yuav nruj dua tshaj bilayers uas tej zaum yuav yog vim li cas lawv evolved nyob rau hauv extremophilic archaea.
Xav txog qhov no, yog vim li cas phospholipids npaj nyob rau hauv ib tug bilayer?
Hauv no bilayer , cov phospholipids yog npaj yog li ntawd txhua lub taub hau hydrophillic taw qhia sab nraud thiab cov tails hydrophobic taw qhia sab hauv. Qhov no kev npaj los txog vim hais tias cov cheeb tsam sab nraud thiab sab hauv koj lub cell feem ntau yog dej, yog li cov tails hydrophobic raug yuam kom ua.
Dab tsi ua rau lub cell membrane kua dej?
Cell membrane yog kua dej vim hais tias ib tug neeg phospholipid molecules thiab cov proteins tau diffuse nyob rau hauv lawv cov monolayer thiab yog li txav mus los. Lub fluidity yog cuam tshuam los ntawm: qhov ntev ntawm fatty acid saw. Ntawm no, qhov luv ntawm cov saw hlau ntau dua kua dej yog cov daim nyias nyias.
Pom zoo:
Yuav ua li cas cov txheej txheem ntawm cell faib nyob rau hauv eukaryotes feem ntau zoo ib yam li cell faib nyob rau hauv prokaryotes?
Tsis zoo li eukaryotes, prokaryotes (uas suav nrog cov kab mob) tau txais ib hom kev faib cell hu ua binary fission. Hauv qee qhov, cov txheej txheem no zoo ib yam li mitosis; Nws yuav tsum tau rov ua dua ntawm cov cell chromosomes, cais ntawm cov theej DNA, thiab kev sib cais ntawm niam txiv cell cytoplasm
Yuav ua li cas cov ntsiab lus teem nyob rau hauv lub periodic rooj?
Ib lub rooj nyob rau hauv uas cov ntsiab lus tshuaj yog teem nyob rau hauv kev txiav txim ntawm nce atomic tooj. Cov ntsiab lus uas muaj cov khoom zoo sib xws tau muab tso rau hauv tib kem (hu ua pab pawg), thiab cov ntsiab lus uas muaj tib lub plhaub hluav taws xob tau teeb tsa hauv tib kab (hu ua lub sijhawm)
Yuav ua li cas yog lub sum ntawm cov atomic masses ntawm tag nrho cov atoms nyob rau hauv ib tug qauv rau ib tug compound?
Cov mis loj ntawm ib yam khoom yog qhov sib npaug ntawm qhov nruab nrab atomic masses ntawm txhua lub atom sawv cev hauv cov tshuaj formula thiab qhia nyob rau hauv atomic mass units. Cov mis loj ntawm covalent compound tseem hu ua molecular mass
Vim li cas phospholipids tsim bilayer hauv cell membrane quizlet?
Phospholipids yog amphipathic nrog ib pawg hydrophilic phosphate thiab ib los yog ob lub hydrophobic hydrocarbon tails. - Lawv tsim bilayers vim tias hydrophobic hydrocarbon tails yuav tiv thaiv los ntawm kev cuam tshuam nrog dej thiab yuav tsim kev sib cuam tshuam tsis zoo
Nyob rau hauv dab tsi organelle yog pyruvate oxidation nqa tawm nyob rau hauv ib lub cell?
Pyruvate oxidation cov kauj ruam Pyruvate yog tsim los ntawm glycolysis nyob rau hauv lub cytoplasm, tab sis pyruvate oxidation tshwm sim nyob rau hauv lub mitochondrial matrix (hauv eukaryotes). Yog li, ua ntej cov tshuaj tiv thaiv tuaj yeem pib, pyruvate yuav tsum nkag mus rau mitochondrion, hla nws daim nyias nyias thiab tuaj txog ntawm matrix