Chitin muaj nyob rau hauv lub plhaub ntawm arthropods xws li crabs, cws, thiab kabthiab tseem tsim los ntawm cov kab mob thiab kab mob.
Cov npe twg hauv qab no tsuas muaj cov polysaccharides uas ntawm cov npe hauv qab no tsuas muaj polysaccharides xwb?
Qhov kev xaiv raug: Cov kev xaiv los ntawm cov npe uas tsuas muaj polysaccharides b) cellulose, starch, thiab glycogen.
Dab tsi ua haujlwm pab pawg tswj cov noob?
DNA methylation tswj cov noob qhia los ntawm kev nrhiav cov proteins koom nrog hauv kev tsim txom noob lossis los ntawm inhibiting qhov kev sib txuas ntawm kev hloov pauv mus rau DNA. Thaum lub sij hawm txoj kev loj hlob, tus qauv ntawm DNA methylation nyob rau hauv lub genome hloov raws li ib tug tshwm sim ntawm ib tug dynamic txheej txheem uas muaj ob qho tib si de novo DNA methylation thiab demethylation.
Dab tsi yog lub ntsiab carbohydrate hauv pob kws yog polysaccharide hu ua?
Ib qho ntawm cov paub zoo tshaj plaws polysaccharides yog starch, daim ntawv tseem ceeb ntawm lub zog cia hauv cov nroj tsuag. Cov hmoov txhuv nplej siab yog ib qho tseem ceeb hauv feem ntau tib neeg cov zaub mov. Cov khoom noj xws li pob kws, qos yaj ywm, mov, thiab nplej muaj cov hmoov txhuv nplej siab siab. Cov hmoov txhuv nplej siab yog ua los ntawm cov piam thaj monomers thiab tshwm sim nyob rau hauv ob qho tib si ncaj-chain thiab branched daim ntawv.
Yuav ua li cas hauv qab no yog piv txwv ntawm lub cev qhuav dej?
Polymerization reactions yog cov piv txwv zoo ntawm lub cev qhuav dej synthesis cov tshuaj tiv thaiv uas monomer units condense ua ke los tsim cov polymers. Tsim cov disaccharides los ntawm monosaccharides hauv carbohydrates, tsim cov lipids nrog ib glycerol thiab peb molecules ntawm fatty acids yog cov piv txwv ntawm lub cev qhuav dej synthesis.
