Fructose and glucose both contain six carbon atoms. Why do the cyclic forms of fructose have a five-membered ring instead of the six-membered ring found in the cyclic forms of glucose? Draw the skeletal structures.

5. Which of these 4 major clades of living organisms (Bacteria, Plants, Animals, and Fungi) produces the following organic compounds? Organic compound Clade(s) Protein Starch Glycogen Cellulose Chitin Peptidoglycan RNA Phospholipid

Consider the following statements about polysaccharides. 1. Starch (amylose or amylopectin) uses a-glycosidic bonds to connect monosaccharides while glycogen uses B-glycosidic bonds. II. Cellulose is more branched than amylopectin. III. Glycogen has more glucose units than amylopectin. Select all the correct statements. Select "None" if none of them are correct. Il only II and III I and II I only Ill only I and III None O I, II, and III

HO HO ܦܐܐ ܒܐܠܥܐ HO HO OH OH HO- OH HO HO- OH Barley grain is used in the production of beer. This grain contains many polysaccharides which are hydrolyzed into sugars for yeast fermentation. Beta-glucans are polymers of glucose units. Many of these polysaccharides have a lot of branching. Identify the glycosidic linkages in this beta-glucan polysaccharide. OH OH OH HO Question 1.b of 45 HO OH A) a-1,4-linkages B) B-1,4-linkages C) a mix of a-1,3 and a-1,4-linkages D) a mix of B-1,3 and ß-1,4-linkages E) a mix of a-1,3 and ß-1,4-linkages Submit +