Chapter 11 Carbohydrates 心 8 When the carbohydrate portion is attached to a serine or threonine residue in a glycoprotein,it is referred to as a(n) glycoprotein. Ans:O-linked Section:11.3 9 The influenza virus recognizes residues of glycoproteins present on cell surface. Ans:sialic acid Section:11.4 10 In C-type lectins,a acts as a bridge between the carbohydrate and the protein Ans:calcium ion Section:11.4 Multiple Choice Questions 1 Carbohydrates are A)polyhydroxy aldehydes. B) polyhydroxy ketones. C) polyhydroxy acids. D) polyhydroxy alcohols. E) a and b. Ans:E Section:Introduction 2 The simplest carbohydrates are A) D-and L-glyceraldehyde. B) dihydroxyacetone and D-and L-glyceraldehyde. C) dihydroxyacetone and glycerate. D) All of the above. E) None of the above Ans:B Section:11.1 3 An aldehyde and alcohol can react to form a A) hemiaketal. D) All of the above. B) hemiketal E) None of the above. C) hemiacetal. Ans:C Section:11.1 4 Fructose can cyclize to (a) A) pyranose ring. B) furanose ring. C) both pyranose and furanose ring forms. D) All of the above. E)None of the above. Ans:C Section:11.1 5 The nutritional storage form(s)of glucose in plants. A)glycogen B)amylose C)amylopectin D)b and c E)All of the above Ans:D Section:11.2Chapter 11 Carbohydrates 3 8 When the carbohydrate portion is attached to a serine or threonine residue in a glycoprotein, it is referred to as a(n)_______________ glycoprotein. Ans: O-linked Section: 11.3 9 The influenza virus recognizes _______________ residues of glycoproteins present on cell surface. Ans: sialic acid Section: 11.4 10 In C-type lectins, a _______________ acts as a bridge between the carbohydrate and the protein. Ans: calcium ion Section: 11.4 Multiple Choice Questions 1 Carbohydrates are A) polyhydroxy aldehydes. B) polyhydroxy ketones. C) polyhydroxy acids. D) polyhydroxy alcohols. E) a and b. Ans: E Section: Introduction 2 The simplest carbohydrates are A) D- and L-glyceraldehyde. B) dihydroxyacetone and D- and L-glyceraldehyde. C) dihydroxyacetone and glycerate. D) All of the above. E) None of the above. Ans: B Section: 11.1 3 An aldehyde and alcohol can react to form a A) hemiaketal. D) All of the above. B) hemiketal. E) None of the above. C) hemiacetal. Ans: C Section: 11.1 4 Fructose can cyclize to (a) A) pyranose ring. B) furanose ring. C) both pyranose and furanose ring forms. D) All of the above. E) None of the above. Ans: C Section: 11.1 5 The nutritional storage form(s) of glucose in plants. A) glycogen B) amylose C) amylopectin D) b and c E) All of the above Ans: D Section: 11.2