1.

    Two molecules of a monosaccharide, CxHyOzC_xH_yO_z, undergo a dehydration reaction to form a disaccharide. What is the general formula of the resulting disaccharide?

    A

    C2xH2yO2zC_{2x}H_{2y}O_{2z}

    B

    CxH2yOzC_{x}H_{2y}O_{z}

    C

    C2xH2y2O2z1C_{2x}H_{2y-2}O_{2z-1}

    D

    C2xH2y1O2z2C_{2x}H_{2y-1}O_{2z-2}

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    9.

    Hyaluronic acid, a glycosaminoglycan found in connective tissues, exhibits unique viscoelastic properties. Which combination of structural features contributes most significantly to these properties?

    A

    Branched structure with α(1→6) linkages, and high sulfate content.

    B

    Repeating disaccharide units containing glucuronic acid and N-acetylglucosamine, along with extensive hydration.

    C

    Linear structure with β(1→4) linkages, and hydrophobic interactions.

    D

    Presence of fucose residues and formation of triple helices.

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