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Biology 120 Lab Quiz I -Marcomolecules I

Biology 120 Lab Quiz I -Marcomolecules I - a glucose b...

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Biology 120 Lab Quiz Macromolecules I 1) Which of the following carbohydrates contain glucose? a. starch b. lactose c. sucrose d. maltose e. all of the above 2) Which of the following tests can be used to identify only monosaccharides that are reducing sugars? 3) Which of the following is a non-reducing disaccharide? 4) Benedict's and Barfoed's reagents have a blue color due to the presence of what kind of ions in the solution? 5) Reducing sugars react and cause the formation of what colored precipitate? a. red-brown b. purple c. pink d. blue-green e. black 6) A carbohydrate is tested with Saliwanoff's reagent and produces a dark red color. Which of the following sugars must be present?
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Unformatted text preview: a. glucose b. fructose c. maltose d. lactose e. ribose 7) A carbohydrate is tested with Seliwanoff's reagent and produces a green color, which of the following sugars must be present? a. triose b. tetrose c. pentose d. hexose e. heptose 8) What color indicates a positive test for starch? a. red b. yellow c. green d. black e. white 9) A positive iodine test would be produced by which food? a. corn starch b. table sugar c. table salt d. honey e. none of the above 10) Predict the results (+ or -) for the following tests when glucose is the carboyhydrate being tested: (Answers Included) Test Glucose Benedicts Test + Barfoed's Test + Iodine Test -Seliwanoff's Test -Glucose Test strip + Answers: 1) e 2) b 3) e 4) b 5) a 6) b 7) c 8) d 9) a 10) Answers already written in....
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