Biomolecules

A linear octasaccharide (molar mass = 1024 g mol-1) on complete hydrolysis produces three monosaccharides: ribose, 2-deoxyribose and glucose. The amount of 2-deoxyribose formed is 58.26 % (w/w) of the total amount of the monosaccharides produced in the hydrolyzed products. The number of ribose unit(s) present in one molecule of octasaccharide is . Use: Molar mass (in g mol-1): ribose = 150, 2-deoxyribose = 134, glucose = 180; Atomic mass (in amu): H = 1, O = 16

For a double strand DNA, one strand is given below: [figure] The amount of energy required to split the double strand DNA into two single strands is kcal mol-1. [Given: Average energy per H-bond for A-T base pair = 1.0 kcal mol-1, G-C base pair = 1.5 kcal mol-1, and A-U base pair = 1.25 kcal mol-1. Ignore electrostatic repulsion between the phosphate groups.]