Write any two reactions of glucose which cannot be explained by the open chain structure of glucose molecule.

Solution

The following two reactions of glucose cannot be explained by the open chain structure of glucose.

(i) Despite having the aldehyde group glucose does not give 2, 4-DNP test, Schiff’s test and it does not form the hydrogen sulphite addition product with NaHSO₃.

(ii) The pentaacetate of glucose does not react with hydroxylamine indicating the absence of free- CHO group.

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Biomolecules

Write any two reactions of glucose which cannot be explained by the open chain structure of glucose molecule.

Some More Questions From Biomolecules Chapter

What are the expected products of hydrolysed of lactose?

How do you explain the absence of aldehyde group in the penta acetate of D-glucose?

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

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

Why cannot vitamin C be stored in our body?

What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?

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?

What is a biomoiecule?

Define carbohydrates.

Give one example each of (i) Reducing sugar and (ii) Non-reducing sugar.

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