Question

In sucrose, the glycosidic linkage is between $C - 1$ of Glucose and $C - 2$ of fructose.
(A). True
(B). False

Answer 1

Hint: Sucrose is common sugar. It is a disaccharide, a molecule composed of two monosaccharide: Glucose and fructose. It is a colourless , crystalline , water soluble sweet substance . It has the molecular formula ${C_{12}}{H_{22}}{O_{11}}$ and is a reducing sugar .

Complete answer:
Sucrose is dextrorotatory with a specific rotation but on hydrolysis it gives dextrorotatory glucose and laevorotatory fructose. Since the laevorotation of fructose $\left( { - 92.4^\circ } \right)$ is quite dextrorotation of Glucose $\left( { + 52.5^\circ } \right)$ , The mixture obtained is Laevorotatory. Thus Hydrolysis of sucrose brings a few changes within the sign of rotation, from dextro $\left( + \right)$ to laevo $\left( - \right)$ and therefore the product is known as Invert sugar.
These two monosaccharide are held together by a glycosidic linkage between $C - 1$ of $\alpha - D - $ glucose and $C - 2$ of $\beta - D$ Fructose since the reducing groups of glucose and fructose are involved in glycosidic bond formation.
Therefore, option A is correct.

Additional Information:
One of the common disaccharides sucrose which on hydrolysis gives an equimolar mixture of $D\left( + \right)$ Glucose and $D\left( - \right)$ fructose.
 ${C_{12}}{H_{22}}{O_{11}} + {H_2}O \to {C_6}{H_{12}}O{_6} + {C_6}{H_{12}}{O_6}$
In nature, sucrose is present in many plants, and especially their roots, fruits and nectars, because it is how to store energy, primarily from photosynthesis. Many mammals, birds, insects and bacteria accumulate and prey on the sucrose in plants and for a few it’s their main food source.
Sucrose may be present sugar, but with the arrival of industrialization, it’s been increasingly refined and consumed to altogether sorts of processed food.


Note:
The invert sugar which is formed due to inversion of sugar is sweeter than sucrose , glucose , galactose and lactose but less sweet than fructose .