Identify the correct set of monosaccharides present in sucrose \((X)\), lactose \((Y)\) and maltose \((Z)\).

Identify the correct set of monosaccharides present in sucrose \((X)\), lactose \((Y)\) and maltose \((Z)\).
  1. \(\begin{array}{|c|c|c|c|} \text{X} & \text{Y} & \text {Z} \\ \begin{array}{l} \text { glucose, } \\ \text { fructose } \end{array} & \begin{array}{l} \text { galactose, } \\ \text { glucose } \end{array} & \begin{array}{l} \text { glucose, } \\ \text { fructose } \end{array} \end{array}\)
  2. \(\begin{array}{|c|c|c|c|} \text{X} & \text{Y} & \text {Z} \\ \begin{array}{l} \text { glucose, } \\ \text { fructose } \end{array} & \begin{array}{l} \text { galactose, } \\ \text { glucose } \end{array} & \begin{array}{l} \text { glucose, } \\ \text { glucose } \end{array} \end{array}\)
  3. \(\begin{array}{|c|c|c|c|} \text{X} & \text{Y} & \text {Z} \\ \begin{array}{l} \text { glucose, } \\ \text { glucose } \end{array} & \begin{array}{l} \text { galactose, } \\ \text { glucose } \end{array} & \begin{array}{l} \text { glucose, } \\ \text { glucose } \end{array} \end{array}\)
  4. \(\begin{array}{|c|c|c|c|} \text{X} & \text{Y} & \text {Z} \\ \begin{array}{l} \text { galactose, } \\ \text { glucose } \end{array} & \begin{array}{l} \text { glucose, } \\ \text { fructose } \end{array} & \begin{array}{l} \text { glucose, } \\ \text { glucose } \end{array} \\ \end{array}\)

Solution

\((X) \longrightarrow\) Sucrose on hydrolysis gives glucose and fructose. i.e. Sucrose \(\longrightarrow\) glucose + fructose \((Y) \longrightarrow\) Lactose on hydrolysis gives D-glucose and D-galactose. i.e. Lactose \(\longrightarrow\) D-glucose + D-galactose \((Z) \longrightarrow\) Maltose on hydrolysis gives 2 units of glucose. i.e. Maltose \(\longrightarrow\) glucose + glucose Thus, correct option is (b).

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more BIOMOLECULES questions on Aicharya