Names of compounds (Note that there are 6 that are not used in question 1 but in

Question

Names of compounds (Note that there are 6 that are not used in question 1 but instead in question 2) SucroseJ Cellulose Chitin D. D-glucose (ring form)E D-glucose (straight chain form) B Amylose A disaccharide with a (14) ghooside bond D An L-ketopentose (straight-chain form) Product of oxidation of glucose H Product of reduction of glucoseF G Maltose A 2. Using the leftover names from the list above, fill in the blanks below. 6 points (a) The polymer of glucose that is the most common organic molecule found in nature:-cellulose (b) Disaccharide composed of glucose and galactose:--Lactose (c) Polysaccharide of glucose units with only a(14) glycoside bonds: Amylose- (d) Polysaccharide of glucose units with a(14) and (16) glycoside bonds found in liver and muscle of animals:--Glycogen (e) Nitrogen containing monosaccharide unit found in blood groups: N-acetyl glucosamine () Polysaccharide composing the exoskeleton of insects-Chitin 3. Of the structures on page one, which would not be a reducing sugar? 3 points J (Sucrose); Also F and H (Products of reduction and oxidation of glucose) 4. Below is the structure of D-ribose. Draw its enantiomer and also draw one of its epimers. 4 points Ho CHO CHO Ho CHO CH2 OH CH2OH CH2OH CH2OH epimers H20H enantiomer

Explanation / Answer

a) Cellulose, a naturally occuring polymer,made up of large chain of glucose molecules linked together, is the most common naturally occring organic molecule.It composes most of the plant structures.

b)Lactose.

c)Amylose is a linear chain polymer of glucose units with only alpha(1--->4) glycosidic bonds.

d)Amylopectin and glycogen have the given dual inkages but amylopectin is found in plants and glycogen in animal liver and skeleton muscles. So answer is Glycogen.

e)N-Acetylglucosamine is right answer.

f)Chitin - a aminopolysaccharide is found in crustaceans, insects and cell walls of fungi.

Comment if any doubt.

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