Exam 14: Biomolecules: Carbohydrates

Instructions: Draw structures for the products you would expect to obtain from reaction of $\beta$ -D-galactopyranose with the listed reagents. Be sure to include all relevant stereochemistry. $\beta$ -D-galactopyranose -Draw: NaBH₄ in H₂O

Instructions: Choose a structure from the list provided below that best fits the description given. There is only one correct answer for each question. -A non-reducing disaccharide

Instructions: From the sugars below, choose the one that best fits each of the following description(s). There is only one correct answer for each question. -a sugar which yields a single alditol upon reduction.

Instructions: From the sugars below, choose the one that best fits each of the following description(s). There is only one correct answer for each question. -a D-sugar.

Instructions: Refer to the sugars below to answer the following question(s). Choose the sugar that best fits each description. There is only one correct answer for each question, but sugars may be used more than once. Indicate each answer by the corresponding letter. -Refer to instructions. _____ a dextrorotary hexose and ______ a levorototary tetrose.

Instructions: Refer to the monosaccharides below to answer the following question(s). -Refer to instructions. Assign R or S configuration to each chirality center in sorbose.

Instructions: Choose a structure from the list provided below that best fits the description given. There is only one correct answer for each question. -A reducing monosaccharide

Instructions: Draw structures for the products you would expect to obtain from reaction of $\beta$ -D-galactopyranose with the listed reagents. Be sure to include all relevant stereochemistry. $\beta$ -D-galactopyranose -Draw: CH₃I, Ag₂O

Instructions: Refer to the monosaccharides below to answer the following question(s). -Refer to instructions. Provide the complete name for the $\alpha$ -anomer of rhamnose in its pyranose form.

The monosaccharide shown below is

Instructions: Refer to the equilibrium below to answer the following question(s). -Refer to instructions. Classify ribose by carbonyl type and number of carbons.

How many D-ketotetroses could exist?

What is the relationship between D-erythrose and D-threose?

Instructions: Consider the reaction below to answer the following question(s). -Refer to instructions. Place a triangle around the anomeric carbon in compound Q.

If the following compound undergoes oxidation in the presence of the appropriate enzyme, draw the structure of the likely product.

Which of the following could not form a pyranose?

Using the following structure of D-talose as a guide, draw the structure for $\alpha$ -D-talopyranose. Label each ring substituent as axial or equatorial.

Instructions: Refer to D-idose below to answer the following question(s). -Refer to instructions. The Fischer projection for D-idose (above) corresponds to which pyranose below?

Instructions: Consider the reaction below to answer the following question(s). -Refer to instructions. Compound Z is:

Instructions: Refer to the monosaccharides below to answer the following question(s). Classify each sugar by type; for example, glucose is an aldohexose. a. Sorbose b. Rhamnose c. Erythrulose d. Xylulose -Refer to instructions. Sorbose is ____________________.