Question

21. Which of the following is not a function of carbohydrates? A) They are catalytic components of enzymes B) They play key roles in processes that take place on the surface of cells C) They are major energy sources D) They are used in structural roles Section: 11.1 22. Carbohydrates are A) aldehydes with two or more hydroxyl groups C) acids with two or more hydroxyl groups E) A and B B) ketones with two or more hydroxyl groups D) amines with two or more hydroxyl groups Section 111 23. How many carbon atoms are in the simplest carbohydrates? A)2 B) 3 C)4 DS E ) 6 Section 111 24. The simplest aldotriose is: A) threose B) dihydroxyacetone ribose D) glyceraldehyde E) sucrose Section 111 25. The simplest ketotriose is A) threose B) dihydroxyacetone ribose D) glyceraldehyde E) sucrose Section 111 26. An aldehyde and alcohol can react to forma A) hemiketal B) hemiacetal C) hemiaketal D) All of the above E) None of the above Section 111 27. Fructose can cyclize to A) pyranose ring B ) furanose ring both A and B D) none of the above Section: 111 28. Which of the following monosaccharides is a ketose? A) fructose B)mannose C) glucose D) galactose Section 111 E) sucrose 29. In a Fischer projection, which chiral carbon determines whether the sugar is the Dorthe L-isomer? A) highest numbered carbon atom B) highest numbered asymmetric carbon atom C) lowest numbered carbon atom D) lowest numbered asymmetric carbon atom Section: 11.1 30. Haworth projection formulas A) are representations of the cyclic form of sugars B) can show the distinction between the a and B-anomers C) both of the above D) neither of the above Section: 11.1

Answer 1

21 Carbohyduates do not uolue enaramatic estyess FALSE b Suface phnemuna TRUE ) Energy sovoae d) Rell wall prouide stustiual Suppesit CX TRUE TRUE X 2:8 a) unetisn aldanydus is not a 22 Caulohydoatu ane Kitore uith tro or more ydreongye yraups LE) BOth A & Po