Sucrose yog ib qho disaccharide ua los ntawm qabzib thiab fructose nrog ob qho tib si alpha thiab beta linkages. Yog li, lo lus teb raug yog kev xaiv C. Lus Cim: Qhov sib txuas ntawm beta yog txawv ntawm alpha linkage tab sis feem ntau cov pa roj carbon atoms koom nrog yog plaub carbon ntawm ib thiab thawj carbon los ntawm lwm tus.
Yuav ua li cas disaccharide muaj qhov sib txawv linkage m altose starch sucrose lactose?
Sucrose, lactose, thiab m altose yog cov khoom noj khoom haus ntau. Lactose, disaccharide ntawm mis nyuj, muaj galactose koom nrog cov piam thaj los ntawm β-1, 4-glycosidic linkage. Lactose yog hydrolyzed rau cov monosaccharides los ntawm lactase hauv tib neeg (Ntu 16.1.
Puas yog kev sib txuas ntawm cov disaccharides?
Disaccharides (C12H22O11) yog cov suab thaj uas muaj ob chav monosaccharide uas tau koom nrog kev sib txuas ntawm carbon-oxygen-carbon hu ua a glycosidic linkage. Qhov kev sib txuas no yog tsim los ntawm cov tshuaj tiv thaiv ntawm cov pa roj carbon monoxide ntawm ib lub voj voog monosaccharide nrog OH pawg ntawm ob monosaccharide.
Yuav ua li cas disaccharide muaj beta linkage?
Sucrose yog tsim los ntawm cov molecule ntawm qabzib koom nrog molecule ntawm fructose los ntawm α-1, β-2-glycosidic linkage.
Dab tsi yog qhov txawv ntawm cov disaccharides lactose thiab m altose?
Ntau Txoj Kev Xaiv Lactose muaj ob chav piam thaj, thaum m altose muaj ob chav galactose. Ob lub monosaccharides nyob rau hauvlactose tau koom nrog 1-4-B-glycoside daim ntawv cog lus, thaum ob lub monosaccharides hauv m altose koom nrog 1 + 4-c-glycoside daim ntawv cog lus.
