chap 15 carbohydrates

chap 15 carbohydrates - Chapter 15 Carbohydrates 15.1...

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Chapter 15 Carbohydrates 15.1 Multiple - Choice Questions 1) A carbohydrate that gives two molecules when it is completely hydrolyzed is known as a A) monosaccharide. B) disaccharide. C) polysaccharide. D) starch. E) trisaccharide. Answer: B 2) Which group of carbohydrates cannot be hydrolyzed to give smaller molecules? A) monosaccharides B) disaccharides C) trisaccharides D) oligosaccharides E) polysaccharides Answer: A 3) A monosaccharide that consists of 5 carbon atoms, one of which is in a ketone group, is classified as a(n) A) aldotetrose. B) aldopentose. C) aldohexose. D) ketotetrose. E) ketopentose. Answer: E 4) A monosaccharide that contains 4 carbon atoms, one of which is in an aldehyde group, is classified as a(n) A) aldopentose. B) aldohexose. C) ketopentose. D) aldotetrose. E) ketotetrose. Answer: D 5) Ribulose has the following structural formula. To what carbohydrate class does ribulose belong? CH2OH C = O H - C - OH H - C - OH CH2OH A) aldotetrose B) aldopentose C) ketotetrose D) ketopentose E) ketohexose Answer: D Page 198 6) The reduction of monosaccharides produces A) sugar alcohols. B) disaccharides. C) trisaccharides. D) sugar acids. E) polysaccharides. Answer: A 7) In the L - isomer of a Fischer projection of a monosaccharide, the - OH group furthest from the carbonyl is written A) on the left of the top chiral carbon. B) on the right of the top chiral carbon.
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C) on the left of the middle chiral carbon. D) on the left of the bottom chiral carbon. E) on the right of the bottom chiral carbon. Answer: D 8) One difference between D - glucose and L - glucose is A) the open - chain form of L - glucose does not exist. B) it is not possible to make L - glucose. C) L - glucose has a 5 - membered ring , and D - glucose has a 6 - membered ring. D) only D - glucose is found in disaccharides and polysaccharides. E) L - glucose cannot form a closed structure. Answer: D 9) The sugar also known as dextrose and blood sugar is A) glucose. B) galactose. C) fructose. D) lactose.
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chap 15 carbohydrates - Chapter 15 Carbohydrates 15.1...

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