Question

d) Water insoluble component on starch. 14. Write the chemical reaction of Glucose which suggests that all the six carbon atoms present in it are in a straight chain. 1mk 15. Mention the name or the term for each of the following: 2mk i) The linkage which joins the ά – amino acid in a protein. ii) The water insoluble component of starch which is a branched chain polymer of ά –D –Glucose. iii) Disease caused due to the deficiency of Vitamin B1. iv) A class of carbohydrates that yield two to ten monosaccharide units on hydrolysis. 16. With reference to biomolecules answer the following: 3mk i) Write the labelled chemical equation for the reaction of glucose with bromine water ii) With respect to solubility in water, differentiate globular protein and fibrous proteins. iii) Name the following: The nucleic acid which has a double helix structure. The hormone responsible for the development of secondary male characteristics. 17. Name the following:- 3mk a) The vitamin responsible for blood coagulation b) The linkage that holds the monomeric units in polysaccharides. c) State the function of RNA. d) Differentiate between amylose and amylopectin with respect to solubility. 18 i) Write a chemical equation that indicates that carbonyl group present as an aldehydic group in the molecule of glucose. 3mk ii) Name the vitamins whose deficiency cause rickets and night blindness respectively. iii) Write the products that would be obtained on hydrolysis of nucleoside from DNA. 19. Give scientific reasons for the following: a) Tryptophan is classified as an essential amino acid. 3mk b) DNA is the chemical basis of heredity. c) Product of hydrolysis of sucrose is known as invert sugar. 20.i) What is the effect of denaturation on the structure of proteins? 3mk ii) Why is sucrose a non-reducing sugar? iii) Write two examples of fat soluble vitamins 21. i) Write the open chain structure of D –(+) – Glucose. 3mk ii) Name the products of hydrolysis of sucrose. iii) Write the chemical name of vitamin C and mention the disease caused by its deficiency.​

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