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Biomolecules

Question

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The melting points and solubility of water of amino acids are generally higher than that of the corresponding halo acids. Explain.

Solution

Amino acids are dipolar in nature (⁺NH₃-CHR-COO^-) and have strong dipolar interaction. Amino acids have amino (basic) group and carboxylic (acidic) group. A proton which comes from carboxylic group is accepted by amino group. Thus amino acid exists in the form of Zwitter ion.

Due to this ionic form, amino acids become crystalline solids and due to this salt like structure, show higher melting point.

Some More Questions From Biomolecules Chapter

Where does the water present in the egg go after the boiling the egg?

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When RNA is hydrolysed, there is no relationship among the quantities of different bases obtained. What does this fact suggest about the structure of RNA?

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Name the anomers of glucose.

State two characteristics of monosaccharides.

Name a carbohydrate containing five carbon atoms per molecule.

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