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Where does the water present in the egg go after boiling the egg?
When an egg is boiled in water, the water present in egg is used in denaturation of protein probably through H-bonding.
Why cannot vitamin C be stored in our body?
Because it is soluble in water and readily excreted in urine and cannot be stored in our body.
Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.
(i) Despite having aldehyde group, glucose does not give Schiff test and 2.,4-DNP test. (ii)Glucose does not react with sodium hydrogen bisulphite to form addition product. (ii)The pentaacetate of glucose does not react with hydroxyl amine showing the absence of free -CHO group.
What are essential and non-essential amino acids? Give two examples of each type.
The amino acids which can be made by our bodies and are not required in our diet are called non-essential amino acids. For example, glycine and alanine. The amino acids which cannot be made by our bodies and must be supplied in our diet are called essential amino acids. For example, valine and leucine.
What happens when D-glucose is treated with the following reagents? (i) HI (i) Bromine water (iii) HNO3
(i) when glucose is treated with HI, it forms n-hexane. (i) when glucose is treated with Bromine water, gluconic acid is formed. (iii) when glucose is treated with nitric acid, Saccharic acid is formed.