Question
The product(s) resulting from the hydrolysis of maltose is/are
The correct answer is
a mixture of $\alpha$-D-Glucose and $\beta$-D-Glucose
Maltose Hydrolysis: Understanding the Products
Maltose is a disaccharide formed by two units of D-glucose linked by an $\alpha(1 \to 4)$ glycosidic bond.
The hydrolysis of maltose involves breaking this glycosidic bond using water.
Chemical Reaction of Maltose Hydrolysis
The hydrolysis reaction can be represented as:
Maltose + H2O $ \xrightarrow{\text{Enzyme or Acid}} $ 2 D-Glucose
Specifically, the $\alpha(1 \to 4)$ glycosidic bond connecting the two glucose residues is cleaved.
Glucose Anomer Formation
- Upon hydrolysis, two molecules of D-glucose are produced.
- D-glucose exists in solution as an equilibrium mixture of its anomers: $\alpha$-D-Glucose and $\beta$-D-Glucose, along with a small amount of the open-chain form.
- The hydrolysis reaction yields these two D-glucose molecules, which then naturally exist in equilibrium.
- Therefore, the hydrolysis of maltose results in a mixture containing both $\alpha$-D-Glucose and $\beta$-D-Glucose.
This corresponds to option A.
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Important Questions from Structure and Function of Biomolecules
- Match the carbohydrates in Column I with the correct glycosidic linkages involved in Column II.
Column I Column II P. Amylose 1. $\beta$ ($1\to 4$) Q. Sucrose 2. $\alpha$ ($1\to 4$) R. Amylopectin 3. $\alpha 1\to \beta 2$ S. Cellulose 4. $\alpha$ ($1\to 4$), $\alpha$ ($1\to 6$) - Match the biomolecules in Column I with their function given in Column II
Column I Column II P. Lectins 1. Acts as ATP dependent pump to efflux out small molecules Q. P-glycoprotein 2. Targets lysosomal enzymes to their destination R. Digitoxigenin 3. Specific carbohydrate binding proteins S. Mannose 6-phosphate 4. Inhibits Na$^+$-K$^+$ pump - Which one of the following coenzymes is utilised by alanine racemase for the conversion of L-Alanine to D-Alanine?
- Correctly match the following Monosaccharides with their respective Epimers.
Monosaccharide Epimer P. D-mannose 1. C-3 epimer of D-glucose Q. D-allose 2. C-4 epimer of D-glucose R. D-galactose 3. C-4 epimer of D-mannose S. D-talose 4. C-2 epimer of D-glucose 5. C-5 epimer of D-glucose - Which of the following show(s) optical activity at 100 mM concentration in water?
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