QUIZ 1. Which is not considered a polysaccharide but is instead a disaccharide? a. Cellulose b. Chitin c. Maltose d. Glycogen Answer: c. Each of these is a polysaccharide made from different connections of glucose to each other with the exception of Maltose, which is also made from glucose but is a disaccharide. 2. Which six-carbon simple carbohydrate forms a five-membered ring? a. Fructose b. Galactose c. Glucose d. Ribose Answer: a. Fructose is a six-carbon sugar that is made into a fivemembered ring because of the location of its carbonyl group, which is a ketone and is not an aldehyde. Both galactose and glucose are sixmembered rings and ribose is a five-carbon sugar. 3. The product of a reaction of an aldehyde with an equivalent number of alcohol units is called what? a. Acetal b. Hemi-acetal c. Ketal d. Ketose Answer: b. A hemiacetal is a molecule that represents the reaction between an aldehyde and an equivalent number of alcohol molecules. The structure can be complex but is basically RCHOROH.
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