Question:
Which of the glycosidic linkage between galactose and glucose is present in lactose ?
Which of the glycosidic linkage between galactose and glucose is present in lactose ?
Show Hint
In Lactose, the glucose unit has a free anomeric carbon at C-1, making it a {reducing sugar}.
Updated On: Feb 12, 2026
- C-1 of galactose and C-4 of glucose
- C-1 of galactose and C-6 of glucose
- C-1 of glucose and C-4 of galactose
- C-1 of glucose and C-6 of galactose
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Lactose is a disaccharide composed of $\beta$-D-galactose and $\beta$-D-glucose.
Step 2: The linkage is formed between the anomeric carbon (C-1) of the galactose unit and the C-4 hydroxyl group of the glucose unit.
Step 3: This is specifically a $\beta$-1,4-glycosidic linkage.
Step 2: The linkage is formed between the anomeric carbon (C-1) of the galactose unit and the C-4 hydroxyl group of the glucose unit.
Step 3: This is specifically a $\beta$-1,4-glycosidic linkage.
Was this answer helpful?
0
0
Top Questions on Biomolecules
- How will you confirm the presence of five –OH groups in a glucose molecule, which are attached to different carbon atoms?
- CBSE CLASS XII - 2026
- Chemistry
- Biomolecules
- What are hormones? Give examples.
- TN Board - 2026
- Chemistry
- Biomolecules
- How do antiseptics differ from disinfectants?
- TN Board - 2026
- Chemistry
- Biomolecules
- α-D-(+) Glucose and β-D-(+) Glucose are:
- TN Board - 2026
- Chemistry
- Biomolecules
- Drugs that bind to the receptor site and inhibit its natural function are called .
- TN Board - 2026
- Chemistry
- Biomolecules
View More Questions
Questions Asked in JEE Main exam
- Figure shows the circuit that contains three resistances (\(9\,\Omega\) each) and two inductors (\(4\,\text{mH}\) each). The reading of ammeter at the moment switch \(K\) is turned ON, is _________ A.
- JEE Main - 2026
- Electromagnetic induction
In the following \(p\text{–}V\) diagram, the equation of state along the curved path is given by \[ (V-2)^2 = 4ap, \] where \(a\) is a constant. The total work done in the closed path is:
- JEE Main - 2026
- Thermodynamics
- Let \[ A=\{z\in\mathbb{C}:|z-2|\le 4\} \quad\text{and}\quad B=\{z\in\mathbb{C}:|z-2|+|z+2|=5\}. \] Then the maximum value of \(|z_1-z_2|\), where \(z_1\in A\) and \(z_2\in B\), is:
- JEE Main - 2026
- Miscellaneous
- The value of \[ \int_{-\pi/6}^{\pi/6} \left( \frac{\pi + 4x^{11}}{1 - \sin\left(|x| + \frac{\pi}{6}\right)} \right) dx \] is equal to
- JEE Main - 2026
- Some Properties of Definite Integrals
- Let O be the vertex of the parabola \(x^2=4y\) and Q be any point on it. Let the locus of the point P, which divides the line segment OQ internally in the ratio 2:3 be the conic C. Then the equation of the chord of C, which is bisected at the point (1, 2), is:
- JEE Main - 2026
- Conic sections
View More Questions