Video: Dab tsi yog qhov chaw ntawm phospholipid molecule?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Phospholipids muaj glycerol molecule , ob fatty acids, thiab ib pab pawg phosphate uas hloov kho los ntawm ib qho cawv. Cov pab pawg phosphate yog qhov tsis zoo-them lub taub hau polar, uas yog hydrophilic. Cov kab mob fatty acid yog cov uas tsis muaj roj, tsis muaj polar tails, uas yog hydrophobic.
Ib yam li ntawd, tib neeg nug, phospholipid molecule yog dab tsi?
Phospholipids yog ib chav kawm ntawm lipids uas yog ib feem tseem ceeb ntawm tag nrho cov cell membranes. Lawv tuaj yeem tsim cov lipid bilayers vim lawv cov yam ntxwv amphiphilic. Cov qauv ntawm cov phospholipid molecule Feem ntau muaj ob hom hydrophobic fatty acid "tails" thiab hydrophilic "lub taub hau" uas muaj cov phosphate pawg.
Cov qauv thiab kev ua haujlwm ntawm phospholipids yog dab tsi? Phospholipids muaj ib tug hydrophilic (los yog 'dej hlub') taub hau thiab ib tug hydrophobic (los yog 'dej ntshai') tail. Phospholipids nyiam ua kab thiab teeb tsa lawv tus kheej rau hauv ob txheej sib luag, hu ua phospholipid bilayer. Cov txheej no ua rau koj cell membranes thiab tseem ceeb heev rau lub cell lub peev xwm ua haujlwm.
Kuj tseem paub yog, dab tsi ntawm phospholipid cuam tshuam nrog dej?
Hydrophilic (polar) lub taub hau pab pawg interacts nrog dej los ntawm kev nyiam mus rau nws thiab hydrophobic (non-polar) tus Tsov tus tw los ntawm kev raug thawb tawm ntawm dej . Vim qhov no polar/non-polar kev sib txuas nrog dej (los yog aqueous protein tov) nws ua rau tsim ntawm phospholipid bilayers (PLBs) ua tau txhua yam.
Qhov twg ntawm phospholipid yog nonpolar?
Hydrophobic, los yog "kev ntshai dej," ib feem ntawm phospholipid muaj nws ntev, tsis muaj polar fatty acid tails. Cov fatty acid tails tuaj yeem cuam tshuam nrog lwm tus tsis muaj polar molecules, tab sis lawv cuam tshuam tsis zoo nrog dej.
Pom zoo:
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